Science Final Exam
A physical property of gold is its a. density. c.nonflammability. b.reactivity with powerful acids. d.None of the above
A
A solid becomes a gas through a process called a. sublimation. c. evaporation. b. condensation. d. freezing.
A
A system that receives energy from external sources is called a. open. c. compound. b. closed. d. efficient.
A
Accuracy is judged by a. how close a value is to the true value. b. the precision of the tool used for measurement. c. the reputation of the scientist. d. None of the above
A
An element's atomic number is equal to its number of a. protons. c. valence electrons b. neutrons. d. protons and neutrons.
A
An ionic bond is a bond that forms between a. ions with opposite charges. b. atoms with neutral charges. c. one atom's nucleus and another atom's electrons. d. the electrons of two different atoms.
A
An iron atom has an atomic mass of 56. Its atomic number is 26. How many neutrons does the iron atom have? a. 30 c. 26 b. 56 d. 82
A
As the kinetic energy of the molecules in a substance increases, the a. temperature of the substance increases. b. temperature of the substance decreases. c. potential energy of the substance changes. d. temperature remains the same.
A
As the temperature of a fixed amount of gas at constant volume decreases, its pressure a. decreases. c. increases. b. stays the same. d. None of the above
A
As the temperature of a gas at constant volume decreases, its pressure a. decreases. c. increases. b. stays the same. d. disappears.
A
Average speed can be represented by the mathematical expression a. distance/time. c. time - distance. b. distance × time. d. time + distance.
A
Avogadro's number is defined as the number of particles in a. one mole of a substance. c. one gram of a substance. b. one liter of a substance. d. one kilogram of a substance.
A
Avogadro's number is useful for a. counting atoms. c. locating an atom's electrons. b. counting large objects. d. None of the above
A
Copper atoms are held together by _____ bonds. a. metallic c. ionic b. hydrogen d. covalent
A
Group 17 elements form a. anions. c. metals. b. cations. d. semiconductors.
A
How does the total momentum of two objects before a collision compare with the total momentum after the collision? a. It is the same. c. It is equal to zero b. It is less. d. It is greater.
A
If two objects with different masses and traveling with different velocities collide, what law allows you to predict the motion of the objects after the collision? a. the law of conservation of momentum b. the law of universal gravitation c. Newton's third law d. Newton's second law
A
In which type of bond do atoms share electrons? a. covalent bonds c. ionic bonds b. metallic bonds d. polyatomic bonds
A
Most elements are a. metals. c. metalloids. b. nonmetals. d. semiconductors.
A
On a velocity vs. time graph, what shows the value of the acceleration? a. the slope of the line c. the y-axis b. the x-axis d. the final velocity
A
One pound is equal to how many newtons? a. 4.448 N c. 0.225 N b. 2.2 N d. 12.5 N
A
SI is considered a consistent system because it a. is used worldwide. c. dates back to 1795. b. uses derived units. d. has seven base units.
A
The _____ of an object consists of its speed and direction. a. velocity c. average speed b. instantaneous speed d. displacement
A
The difference between speed and velocity is that velocity includes a. direction. c. time. b. distance. d. weight.
A
The kinetic theory states that the higher the temperature, the faster the a. particles that make up a substance move. b. bonds between atoms break down. c. molecules of gas rush together. d. lighter particles within a substance clump together.
A
The law that states that every object maintains constant velocity unless acted on by an unbalanced force is a. Newton's first law of motion. b. Newton's second law of motion. c. Newton's third law of motion. d. the law of conservation of momentum.
A
The order of elements in the periodic table is based on a. the number of protons in the nucleus. b. the electric charge of the nucleus. c. the number of neutrons in the nucleus. d. atomic mass.
A
The temperature at which a substance changes from a liquid to a solid is the a. freezing point. c. boiling point. b. saturation point. d. condensation point.
A
The tendency of an object at rest to remain at rest is a. inertia. c. free fall. b. momentum. d. acceleration.
A
Two different isotopes of an element have different a. numbers of neutrons. c. atomic numbers. b. numbers of protons. d. numbers of electrons.
A
What is an atom's nucleus made of? a. protons and neutrons c. only neutrons b. only protons d. anodes
A
What is the unbalanced force that slows down a ball rolling across the floor? a. the force of friction c. the force of inertia b. the force of gravity d. the force of momentum
A
When a fixed sample of gas increases in temperature, it must also a. increase in pressure. c. decrease in pressure. b. increase in volume. d. increase in mass.
A
When energy is transformed, the amount of usable energy a. decreases. c. increases. b. remains constant. d. None of the above
A
When one feels a warm oven, the sensation of warmth is the result of a. energy transfer. c. contraction of molecules. b. potential energy. d. molecular transfer.
A
Which of the following is equal to 5,800,000,000 cm? a. 5.8 × 109 cm c. 5.8 × 108 cm b. 58 × 109 cm d. 58 × 107 cm
A
Which of the following is not true of noble gases? a. They are highly reactive. c. They belong to Group 18. b. They exist as single atoms. d. They are nonmetals.
A
Which statement about the modern model of the atom is not true? a. Electrons can be found between energy levels. b. Electrons can be found only in certain energy levels. c. The precise location of electrons cannot be predicted. d. Electrons are most likely to be found in orbitals.
A
Whose model determined that an atom's positive charge is concentrated in the atom's center? a. Rutherford's c. Democritus's b. Dalton's d. Thomson's
A
_____ is defined as the rate at which work is done. a. Power c. Speed b. Joule d. Mechanical advantage
A
A carbon atom can bond to four other atoms because it has a. four different cations. c. two inner energy levels. b. four valence electrons. d. no protons in its nucleus.
B
A chemical property of copper is its a. density. c. color. b. reactivity. d. melting point.
B
A dog running at a speed of 12 m/s has 1,080 J of kinetic energy. What is the mass of the dog? a. 7.5 kg c. 30 kg b. 15 kg d. 45 kg
B
A force of 240.0 N causes an object to accelerate at 3.2 m/s2. What is the mass of the object? a. 0.013 kg c. 240 kg b. 75 kg d. 768 kg
B
A group of atoms that acts as a unit is called a(n) a. mixture. c. element. b. molecule. d. compound.
B
A man pushes a crate along a factory floor by exerting a force of 55 N. If the crate moves a distance of 4.0 m, how much work does the man perform? a. 165 N c. zero b. 220 N d. 145 J
B
A mole is an SI base unit that describes the a. mass of a substance. c. volume of a substance. b. amount of a substance. d. electric charge of a substance.
B
A pair of tweezers is a. a first-class lever. b. a compound machine made of two third-class levers. c. a compound machine made of two second-class levers. d. a kind of wedge.
B
A subatomic particle that has a negative charge is called a(n) a. molecule. c. element. b. electron. d. compound.
B
A wheelbarrow is an example of a a. first-class lever. c. third-class lever. b. second-class lever. d. fourth-class lever.
B
According to modern atomic theory, it is nearly impossible to determine an electron's exact a. color. c. charge b. position. d. mass.
B
All matter is made of atoms and molecules that are a. always fixed in position. c. moving in the same direction. b. always in motion. d. moving slowly.
B
An astronaut with a mass of 91 kg is 0.30 m above the moon's surface. The astronaut's potential energy is 46 J. Calculate the free-fall acceleration on the moon. a. 0.15 m/s2 c. 6.6 m/s2 b. 1.7 m/s2 d. 9.8 m/s2
B
An atom's mass number equals the number of a. protons plus the number of electrons. b. protons plus the number of neutrons. c. protons. d. neutrons.
B
An internal combustion engine uses what kind of energy to do work? a. radiation c.solar b. heat d.electrical
B
An object has a kinetic energy of 810 J after falling a certain distance. If the mass of the object is 20 kg, what is the speed of the object at this time? a. 10 m/s c. 8 m/s b. 9 m/s d. 7 m/s
B
An object that changes position relative to a reference point is a. stationary. c. moving at constant speed. b. in motion. d. moving at constant velocity.
B
Carbon and other nonmetals are found in which area of the periodic table? a. on the left-most side b. on the right side c. in the middle column of the periodic table d. in the bottom rows
B
Convert 300 K to the Celsius scale. a. 0°C c. 73°C b. 27°C d. 573°C
B
Displacement must always indicate a. velocity. c. speed. b. direction. d. time.
B
Energy from the sun reaches Earth by a. conduction and radiation. c. conduction and convection. b. radiation only. d. conduction only.
B
Fe2O3 is named iron (III) oxide because it contains a. three oxygen atoms. c. three iron atoms. b. Fe3+ ions. d. O3+ ions.
B
Free-fall acceleration near Earth's surface a. depends on an object's weight. c. depends on an object's mass. b. is the same for all objects. d. None of the above
B
Heat always moves from an object of _____ temperature to an object of _____ temperature. a. moderate, high c. lower, higher b. higher, lower d. zero, high
B
Helium is used in balloons because it is a. reactive with rubber. c. flammable. b. lighter than air. d.a colored gas.
B
How does the density of an object that sinks into a fluid compare to the density of the fluid? a. The object that sinks is less dense than the fluid. b. The object that sinks is more dense than the fluid. c. The object that sinks is as dense as the fluid. d. The density of the object is not related to the density of the fluid.
B
How much power is required to do 180 J of work in 2.4 s? a. 7.5 W c. 178 W b. 75 W d. 430 W
B
How much power is required to lift a 30.0 N chair 0.20 m in 2.0 s? a. 1.0 W c. 12 W b. 3.0 W d. 15 W
B
If the net force acting on a stationary object is zero, then the object will a. accelerate in the direction of the strongest force. b. remain at rest. c. begin moving backwards. d. decelerate at a steady rate of speed.
B
Lead has a density of 11.3 g/cm3 and a mass of 282.5 g. What is its volume? a. 2.5 cm3 c. 250 cm3 b. 25 cm3 d. 2500 cm3
B
Often atoms join so that each atom will have a. an even number of electrons. b. an outermost energy level that is full of electrons. c. an equal number of protons and electrons. d. more electrons than either protons or neutrons.
B
On a speed-time graph, a line with a negative slope indicates that the object is a. speeding up. c. not moving. b. slowing down. d. traveling at a constant speed.
B
Scientific theories can be changed or replaced when a. new technology is invented. b. new discoveries are made. c. scientists decide to work on different problems. d. scientists make models of events or objects.
B
Solar panels gather _____ energy from the sun. a. kinetic c. potential b. radiated d. mechanical
B
Temperature is a measure of the average _____ energy of an object's particles. a. mechanical c. potential b. kinetic d. light
B
The anion formed from an oxygen atom is called a(n) a. oxygen ion. c. carbon dioxide. b. oxide ion. d. nitrous oxide.
B
The average speed of a runner who runs 500.0 m in 1.6 min is a. 0.19 m/s. c. 96 m/s. b. 5.2 m/s. d. 312 m/s.
B
The brakes on a car exert a frictional force of 6,000 N in getting the car to stop. If the work done by the brakes is 120,000 J in coming to a stop, how many meters does the car travel after the driver applies the brakes? a. 6 m c. 12 m b. 20 m d. 40 m
B
The energy transferred between objects with different temperatures is a. absolute zero. c. potential. b. heat. d. cold.
B
The law that states that the unbalanced force acting on an object equals the object's mass times its acceleration is a. Newton's first law of motion. b. Newton's second law of motion. c. Newton's third law of motion. d. the law of conservation of momentum.
B
The mass of a 20 L sample of gas with a density of 0.04 mg/L is a. 0.08 mg. c. 8 mg. b. 0.8 mg. d. 80 mg.
B
The smallest unit of an element that maintains the properties of that element is a(n) a. molecule. c.substance. b. atom. d.compound.
B
The transfer of energy as heat caused by the collision of molecules is called a. convection. c. contact. b. conduction. d. radiation.
B
The transfer of energy to a body by the application of a force that causes the body to move in the direction of the force is called a. power. c. distance. b. work. d. mechanical advantage
B
Valence electrons determine an atom's a. mass. c. electric charge. b. chemical properties. d. period.
B
What happens to the particles of a substance when it condenses? a. Particles speed up and spread out. b. Particles slow down and clump together. c. Particles stick together and stop moving. d. Particles vibrate as they lose energy.
B
What is the amount of nickel, which has an average atomic mass of 58.7 u, present in 525 g nickel? a. 28.0 mol c. 525 mol b. 8.90 mol d. 58.7 mol
B
What is the momentum of a 255 g apple falling at 16.0 m/s? a. 4.08 m/s2 downward c. 15.9 m/s2 downward b. 4.08 kg • m/s downward d. 15.9 kg • m/s downward
B
When gravitational forces and air resistance equalize on an object that is falling toward Earth and the object stops accelerating, what is the velocity of an object called? a. resultant velocity c. instantaneous velocity b. terminal velocity d. average velocity
B
Which of the following is an element? a. salt c. nylon b. iron d. sand
B
Which of the following is an example of a third-class lever? a. a nutcracker c. a crow bar b. a hand-held boat paddle d. a screw
B
Which of the following is not a potential sign of chemical change? a. release of gas c. change of color b. evaporation of water d. production of gas
B
Which of these properties is shared by solids, liquids, and gases? a. They expand to fill their containers. b. Their particles are in constant motion. c. They are easily compressible. d. They are fluids.
B
Which unit is used to measure the height of a bookcase? a. kelvin c. kilogram b. meter d. mole
B
_____ does not involve the movement of matter. a. Conduction c. Heat b. Radiation d. Convection
B
A compound differs from a mixture because it a. always remains frozen even at high temperatures. b. is formed from two cations. c. is held together by chemical bonds. d. can form only in the presence of heat energy.
C
A dropped racquetball will not return to its original position because a. potential energy is inefficient. b. the mechanical energy is stored up for later bounces. c. some of the mechanical energy is converted to nonmechanical energy. d. energy is not conserved.
C
A first-class lever has the a. fulcrum at one end and the output force between the fulcrum and the input force. b. fulcrum at one end and the input force between the fulcrum and the output force. c. fulcrum in the middle. d. input force in the middle.
C
A force is continuously applied to an object, causing it to accelerate. After a period of time, however, the object stops accelerating. What conclusion can be drawn? a. The mass of the object has increased. b. Gravity on the object has increased. c. The object is experiencing some kind of friction. d. The momentum of the object has reached a maximum.
C
A unified atomic mass unit is equal to a. one-half the mass of a hydrogen atom. b. one-fourth the mass of a lithium atom. c. one-twelfth the mass of a carbon-12 atom. d. one-fifteenth the mass of a nitrogen-15 atom.
C
Acceleration is defined as the change in velocity divided by a. speed. c. time. b. final velocity. d. distance.
C
An ionic compound of calcium and chlorine would be named a. calcium chlorine. c. calcium chloride. b. calcium chlorite. d. chlorine calcium.
C
An object's momentum is determined by the object's a. weight and velocity. c. mass and velocity. b. mass and acceleration. d. weight and acceleration.
C
As the volume of a fixed amount of gas at constant temperature decreases, its pressure a. decreases. b. stays the same. c. increases. d. Insufficient data to answer question
C
As you move from up to down in a column of the periodic table, elements have a. fewer protons. c. a higher atomic number. b. a lower atomic number. d. a higher group number.
C
Atoms have no electric charge because they a. have an equal number of charged and noncharged particles. b. have neutrons in their nuclei. c. have an equal number of electrons and protons. d. have an equal number of neutrons and protons.
C
Atoms of elements that are in the same group have the same number of a. protons. c. valence electrons. b. neutrons. d. protons and neutrons.
C
Atoms that gain or lose electrons are called a. metals. c. ions. b. nonmetals. d. isotopes.
C
Covalent bonds are formed between a. ions. c. nonmetal atoms. b. metal atoms. d. compounds.
C
How many atoms are in a single molecule of Fe2O3? a. 2 c. 5 b. 3 d. 6
C
How many significant figures are in 7.357? a. three c.four b. one d.five
C
If the atomic mass of carbon is 12 u, 1 mole of pure carbon will have a mass of a. 6 g. c. 12 g. b. 6 mol. d. 12 mol.
C
If you are given the mass of an object in pounds, the time in seconds, and the distance in feet, what must you do before you can calculate the momentum in SI units? a. convert the mass to kilograms c. Both (a) and (b) b. convert the distance to meters d. None of the above
C
Most scientific questions are developed from a. research. c. observations. b. investigation. d. forming a hypothesis.
C
One newton is the force that can give a mass of 1 kg an acceleration of a. 1 m/s. c. 1 m/s2. b. 9.8 m/s. d. 9.8 m/s2.
C
Semiconductors are elements that a. have large atomic masses but small atomic numbers. b. do not form compounds. c. can conduct heat and electricity under certain conditions. d. are extremely hard.
C
Sodium has one electron in its outer shell and chlorine has seven electrons in its outer shell. The atoms will form a(n) _____ bond by _____ their electrons. a. covalent, transferring c. ionic, transferring b. covalent, sharing d. ionic, sharing
C
The SI unit for speed is a. mph. c. m/s. b. ft/s2. d. Δv / t.
C
The kind of energy associated with atomic bonds is a. nuclear energy. c. chemical energy. b. light energy. d. kinetic energy.
C
The law of conservation of mass states that mass cannot be a. burned. c.created or destroyed. b.changed in form. d.heated or cooled.
C
The law that states that for every action force there is an equal and opposite reaction force is a. Newton's first law of motion. b. Newton's second law of motion. c. Newton's third law of motion. d. the law of conservation of momentum.
C
The name dinitrogen tetroxide tells you that this compound contains a. 2 N atoms and 2 O atoms. c. 2 N atoms and 4 O atoms. b. 4 N atoms and 2 O atoms. d. 4 N atoms and 4 O atoms.
C
The temperature at which all molecular motion stops is a. 0°C. c. 0 K. b. 0°F. d. All of the above
C
The total amount of energy (both usable and unusable) in any process a. increases. c. remains constant. b. decreases. d. varies.
C
What are the two families of simple machines? a. wedge and compound c. inclined plane and lever b. first class and second class d. pulley and screw
C
What is Mendeleev is known for? a. creating today's atomic model c. publishing the first periodic table b. discovering protons d. discovering Mendelevium
C
What is the kinetic energy of a 1.40 kg discus with a speed of 22.5 m/s? a. 15.8 J c. 354 J b. 31.5 J d. 709 J
C
What is the mass number of an element that has 19 protons, 19 electrons, and 20 neutrons? a. 19 c. 39 b. 20 d. 58
C
What law is illustrated by the equation P1V1 = P2V2 a. Charles's law c. Gay-Lussac's law b. Boyle's law d. Archimedes' principle
C
When a fixed sample of gas increases in volume, it must also a. decrease in pressure. c. Either (a) or (b) b. increase in temperature. d. Both (a) and (b)
C
When ice melts to form liquid, energy is a. created. c. released. b. destroyed. d. absorbed.
C
When nickel combines with fluorine to form nickel (III) fluoride, the charge of the nickel ion is a. Ni1+. c. Ni3+. b. Ni2+. d. Ni4+.
C
Which of the following causes a chemical change? a. moving c.burning b. shattering d. melting
C
Which of the following is made of at least two different types of atoms? a. element c. compound b. molecule d. matter
C
Which of the following statements about work and energy is not true? a. When work is done, energy is transferred or transformed. b. Energy may be defined as the ability to do work. c. Work and energy are always equal. d. Work and energy have the same units.
C
Which of the following temperatures is impossible to measure? a. -85°F c. -20 K b. -50°C d. 545°F
C
Which type of graph best shows data that are parts of a whole? a. bar graph c. pie chart b. line graph d. All of the above
C
Which unit is used to measure the mass of a computer? a. kelvin c. kilogram b. meter d. mole
C
Why does the volume of a gas decrease when the pressure increases? a. Gas particles slow down when the pressure is increased. b. Gas particles bond when the pressure is increased. c. Gas particles are pushed together when the pressure is increased. d. Gas particles become smaller when the pressure is increased.
C
You have 6.50 mol of chromium, which has a molar mass of approximately 52 g/mol. What is the mass in grams of this amount of chromium? a. 3.38 g c. 338 g b. 33.8 g d. 3.38 kg
C
(5.2 × 106) × (5.0 × 103) = a. 2.6 × 108 c. 2.6 × 109 b. 2.6 × 103 d. 2.6 × 1010
D
A gas becomes a liquid through a process called a. melting c. evaporation. b. freezing. d. condensation.
D
A molecule of water (H2O) is made from _____ combining two hydrogen atoms and one oxygen atom. a. physically c. thermally b. ionically d. chemically
D
A substance changes from a liquid to a gas during evaporation because a. energy is lost. c. energy is created. b. energy is released. d. energy is absorbed.
D
According to the law of conservation of energy a. energy is not absorbed or released in changes of state. b. energy is not transferred during changes of state. c. energy is not created or destroyed in changes of state. d. a substance has the same energy before and after a change of state.
D
An electron jumps to a new energy level when a. the atom becomes charged. b. the atom becomes unstable. c. the electron's location is pinpointed. d. the atom gains or loses energy.
D
An object is in motion when a. you observe the object move. b. the object's speed increases. c. the object's displacement is greater than the distance traveled. d. the object changes position relative to a stationary reference point.
D
As a dropped penny falls toward the ground, _____ energy is converted to _____ energy. a. thermal, potential c. kinetic, heat b. kinetic, vibrational d. potential, kinetic
D
Atoms and ions are held together by a. nuclear bonds. c. physical bonds. b. stick bonds. d. chemical bonds.
D
Calculate the gravitational potential energy relative to the ground when an 82 kg person climbs to the top of a 2.0 m stepladder. a. 164 J c. 402 J b. 3.3 × 102 J d. 1.6 × 103 J
D
Elements that have one valence electron tend to a. be highly reactive. c. become charged. b. form ions. d. All of the above
D
Express the following as an equation: One newton is the force that can give an object with a mass of 1 kg an acceleration of 1 m/s2. a. 1 N = 1 kg ÷ 1 m/s2 c. 1 N = 1 m/s2 ÷ 1 kg b. 1 N × 1 kg = 1 m/s2 d. 1 N = 1 kg × 1 m/s2
D
Gravitational potential energy depends on a. the mass of the object. c. the acceleration due to gravity. b. the height of the object. d. All of the above
D
How do you know that potassium, an alkali metal, is highly reactive? a. It conducts heat. c. It is a soft and shiny metal. b. It conducts electricity. d. It has one valence electron.
D
How much does a 59.0 kg woman weigh on Earth? a. 6.02 N c. 145 lb b. 59.0 lb d. 578 N
D
How much effect do commonly found isotopes have on the average atomic mass of an element? a. less than rarely found isotopes c. same as rarely found isotopes b. no effect on atomic mass d. more than rarely found isotopes
D
Mendeleev left gaps in his periodic table because a. the table was too small. c. the table was too full. b. protons belonged there. d. no known elements fit there.
D
Molar mass is defined as a. the number of particles in one mole of a substance. b. the SI base unit that describes the amount of a substance. c. the amount of a substance necessary to have a positive charge. d. the mass in grams of one mole of a substance.
D
Moving from 0 m/s to 25 m/s in 8.0 s equals an average acceleration of a. 0.32 m/s. c. 3.1 m/s. b. 0.32 m/s2. d. 3.1 m/s2.
D
Scientific methods a. are a general description of scientific thinking. b. are used to find and evaluate possible answers to problems. c. use critical thinking to solve scientific problems. d. All of the above
D
Speeding up, slowing down, and changing direction is best described as a. velocity. c. displacement. b. distance. d. acceleration.
D
The Fahrenheit temperature scale is defined by which of the following temperatures? a. Water boils at 100 degrees and freezes at 32 degrees. b. Water boils at 212 degrees and freezes at 32 degrees. c. Water evaporates at 212 degrees and freezes at 0 degrees. d. Liquid water turns to a gas at 100 degrees and to a solid at 0 degrees.
D
The change of a substance from a solid directly to a gas is called a. condensation. c. melting. b. evaporation. d. sublimation.
D
The chemical symbol for sulfuric acid is H2SO4. How many atoms are contained in each molecule of sulfuric acid? a. 3 c. 6 b. 5 d. 7
D
The combination of all of the forces acting on an object is called the a. total force. c. super force. b. union of forces. d. net force.
D
The force of gravity, the electromagnetic force, the strong nuclear force, and the weak nuclear force are considered a. centripetal forces. c. resultant forces. b. frames of reference. d. fundamental forces.
D
The force with which gravity pulls on a quantity of matter is referred to as a. mass. c. volume. b. length. d. weight.
D
The kinetic theory helps to explain the differences between a. temperatures of objects. c. types of motion. b. particles of matter. d. states of matter.
D
The name for the compound with the formula Cr2O3 would be written as a. chromium(I) oxide. c. chromium oxygen. b. chromium(II) oxide. d. chromium(III) oxide.
D
What are the units of power? a. watts c. joules per second b. horsepower d. All of the above
D
What are the units of work? a. J c. kg • m2/s2 b. N • m d. All of the above
D
Which item below contains insulation material? a. stainless steel fork c. brass nail b. aluminum pie pan d. plastic foam cup
D
Which of the following elements is an alkali metal? a. calcium c. mercury b. magnesium d. sodium
D
Which of the following is not a pure substance? a. element c. compound b. molecule d. mixture
D
Which of the following is the name of a temperature scale? a. Celsius c. Kelvin b. Fahrenheit d. All of the above
D
Which statement illustrates Newton's first law? a. A stone will not move unless something pushes or pulls it. b. A ball rolling across the floor eventually slows down. c. As a car comes to a stop, the passengers continue to move forward. d. All of the above
D
_____ is a measure of the ability to do work. a. Photosynthesis c. Respiration b. Power d. Energy
D
Cu
copper
The particles can slide past each other, but are still packed together.
liquid
The particles have broken down and become ionized.
plasma
Fe2O3
rust
The particles are in a rigid, fixed structure
solid
C12H22011
table sugar
H20
water
