Physical Science Released Test - 2009

Which element has the same number of valence electrons as krypton (Kr)? A neon (Ne) B fluorine (F) C chlorine (Cl) D selenium (Se)

A neon (Ne)

A teacher wants to demonstrate a chemical reaction to her students. Which activity would best demonstrate a chemical reaction? A placing a metal in an acid to create a gas B measuring the densities of liquid water and ice C melting a solid piece of aluminum D filling a balloon with helium gas

A placing a metal in an acid to create a gas

This diagram represents a closed circuit. How much current flows through this circuit? A 0.5 A B 2 A C 18 A D 72 A

B 2 A

This graph represents the velocity of an object over time. What is the average acceleration of the object during the first 4 seconds? A 1 m/s/s B 2 m/s/s C 4 m/s/s D 8 m/s/s

B 2 m/s/s

A student moves a box across the floor by exerting 23.3 N of force and doing 47.2 J of work on the box. How far does the student move the box? A 0.49 m B 2.03 m C 23.9 m D 1,099.8 m

B 2.03 m

A car is traveling at a constant speed of 12 m/s. When the driver accelerates, the car reaches a speed of 26 m/s in 6 s. What is the average acceleration of the car? A 2 m/s/s B 2.3 m/s/s C 4.3 m/s/s D 84 m/s/s

B 2.3 m/s/s

This graph shows temperature vs. energy data for a substance What is the melting point of this substance? A 0°C B 20°C C 50°C D 90°C

B 20°C

A flashlight bulb connected to a 6-V battery draws a 0.5-A current. What is the power used by the flashlight bulb? A 1.25 W B 3 W C 6.5 W D 12 W

B 3 W

Which describes an atom with an atomic number of 9? A 10 protons, 9 neutrons B 9 protons, 10 neutrons C 4 protons, 5 neutrons D 3 protons, 3 neutrons

B 9 protons, 10 neutrons

A student applies a force to a box with a mass of 30 kg. If the student applies the same force to a box with a mass of 15 kg, which best describes the effect on the acceleration of the 15-kg box? A It is half the acceleration of the 30-kg box. B It is double the acceleration of the 30-kg box. C It is the same as the acceleration of the 30-kg box. D It is triple the acceleration of the 30-kg box.

B It is double the acceleration of the 30-kg box.

Which statement best explains why there could be a force of attraction between two electrically charged objects? A because they have like charges B because they have unlike charges C because they have the same number of protons D because they have the same number of electrons

B because they have unlike charges

How is this reaction classified? CaO + H2O --> Ca(OH)2 + heat A endothermic B exothermic C decomposition D double replacement

B exothermic

What is one problem with using nuclear fission as an energy source? A finding radioactive elements that have longer half-lives B finding ways of storing radioactive wastes C finding compounds to cool heated water D finding nonradioactive elements for nuclear reactors

B finding ways of storing radioactive wastes

Which best represents how electrons are arranged in the energy levels of a carbon atom? A first energy level = 1 electron second energy level = 5 electrons B first energy level = 2 electrons second energy level = 4 electrons C first energy level = 3 electrons second energy level = 3 electrons D first energy level = 4 electrons second energy level = 2 electrons

B first energy level = 2 electrons second energy level = 4 electrons

How much potential energy does a 55-kg person gain when she walks to the top of a hill 20 m tall? A 75 J B 539 J C 1,100 J D 10,780 J

D 10,780 J

This diagram shows three horizontal forces acting on an object. F Neglecting friction, what is the magnitude of force, F, if the object remains at rest? A 6 N B 8 N C 14 N D 22 N

D 22 N

A sound wave has a frequency of 247 Hz and a wavelength of 1.4 m. What is the speed of the sound wave in air? A 176.4 m/s B 245.6 m/s C 248.4 m/s D 345.8 m/s

D 345.8 m/s

A series circuit has a current of 3 A. The circuit contains a 12- resistor. What is the voltage of the circuit? A 0.25 V B 4 V C 15 V D 36 V

D 36 V

A ball with a mass of 5 kg is dropped from a resting position 10 m above the ground. What is the potential energy of the ball just before it is dropped? A 0 J B 49 J C 98 J D 490 J

D 490 J

A large rock has a mass of 750 kg. What is its weight? A 76.5 N B 740.2 N C 759.8 N D 7,350 N

D 7,350 N

If 15 N of force are applied to a cart to move it a distance of 5 m, how much work is done on the cart? A 0.33 J B 3 J C 15 J D 75 J

D 75 J

This diagram shows two copper spheres. Sphere 1 is negatively charged, and Sphere 2 is neutral. What will be the result when the two spheres touch? A Sphere 1 will become positively charged. B Sphere 2 will become positively charged. C Both spheres will become negatively charged equal to the initial charge of Sphere 1. D Both spheres will become negatively charged less than the initial charge of Sphere 1.

D Both spheres will become negatively charged less than the initial charge of Sphere 1.

This diagram represents a closed circuit with three light bulbs and a 10-volt battery If Bulb 3 burns out in the circuit, what will most likely happen? A Bulb 1 and Bulb 2 will continue to glow. B Bulb 1 and Bulb 2 will not glow as brightly. C Bulb 1 will glow, but Bulb 2 will not glow. D Bulb 1 and Bulb 2 will not glow.

D Bulb 1 and Bulb 2 will not glow.

Which element is an alkaline earth metal? A Li B O C Ne D Ca

D Ca

Which chemical equation represents a double replacement reaction? A 2Na + CI2 --> 2NaCI B 2KCIO3 --> 2KCI + 3O2 C Zn + 2HCI --> ZnCI2 + H2 D NaOH + HCI --> NaCI + H2O

D NaOH + HCI --> NaCI + H2O

This chart shows the effects of several solutions on litmus paper. Which solutions are most likely acids? A Solutions 1 and 3 B Solutions 2 and 5 C Solutions 3 and 6 D Solutions 4 and 7

D Solutions 4 and 7

Which type of bond is responsible for atoms of pure gold to remain bonded? A covalent B hydrogen C ionic D metallic

D metallic

Which is the lowest point of a transverse wave? A amplitude B crest C period D trough

D trough

This graph represents the motion of a cart. What is the average speed of the cart? A 0.83 m/s B 1.17 m/s C 5 m/s D 65 m/s

A 0.83 m/s

How many protons and neutrons are there in an atom of 11/5 B ? A 5 protons and 6 neutrons B 5 protons and 11 neutrons C 11 protons and 5 neutrons D 11 protons and 6 neutrons

A 5 protons and 6 neutrons

Which is the correctly balanced equation? A CI2 + 2NaI --> 2NaCI + I2 B CI2 + 2NaI --> NaCI + 2I2 C CI2 + NaI --> NaCI + I2 D 2CI2 + NaI --> 2NaCI + I2

A CI2 + 2NaI --> 2NaCI + I2

This graph shows the solubility curves for various ionic compounds. Which compound is most affected by a change in temperature from 30C to 50C? A CsNO3 B NH4Br C CuSO4 D KCI

A CsNO3

An aqueous solution is tested with an electrical conductivity probe. The conductivity probe does not detect an electric current. Which solution was most likely tested? A SO2 solution B NaNO3 solution C MnCl2 solution D Ba(OH)2 solution

A SO2 solution

Which conclusion can be drawn from Rutherford's gold foil experiment? A The atom has a small positive center. B The atom has a small negative center. C The atom has a large positive center. D The atom has a large negative center.

A The atom has a small positive center.

A person places a metal spoon that is at room temperature into a bowl of hot soup. How will the thermal energies of the spoon and the soup be affected? A The spoon will increase in thermal energy, and the soup will decrease in thermal energy. B Both the spoon and the soup will increase in thermal energy. C The spoon will decrease in thermal energy, and the soup will increase in thermal energy. D Both the spoon and the soup will decrease in thermal energy

A The spoon will increase in thermal energy, and the soup will decrease in thermal energy.

If the north poles of two bar magnets are brought together, which is true? A The two north poles will repel each other. B The two north poles will attract each other. C No force will be experienced between the two magnets. D One north pole will become a south pole due to the interaction.

A The two north poles will repel each other.

Which best describes alpha particles? A They are attracted to negative electric fields. B They are composed of beta particles. C They are able to penetrate concrete blocks. D They are products of chemical reactions.

A They are attracted to negative electric fields.

Which statement best describes the atoms of elements that form compounds by covalent bonding? A They share electrons between them. B They have a large difference in atomic mass. C They are in the same period in the periodic table. D They have a large difference in valence electron number

A They share electrons between them.

Which best explains why water dissolves most salts? A Water is polar, and salts form ions in solution. B Water is nonpolar, and salts form ions in solution. C Water has the same density as salts. D Water has a different density than salts.

A Water is polar, and salts form ions in solution.

This diagram represents a balloon that is moving in one direction while escaping air is moving in the opposite direction. What causes the balloon to move? A action-reaction forces B electrical forces C friction D gravitational potential energy

A action-reaction forces

Which circuit has the most current flowing through it? a. 15 W -> V=12V b. 9 W -> V=15V C 15 W -> V=9V D 18 W -> V=12V

C 15 W -> V=9V

How many neutrons are in an atom of Pu-246? A 94 B 150 C 152 D 246

C 152

This is an unbalanced equation representing a chemical reaction. HgO --> Hg + O2 Which equation is the correctly balanced chemical equation for this reaction? A HgO --> Hg + 2O2 B 2HgO --> Hg + O2 C 2HgO --> 2Hg + O2 D 2HgO --> Hg + 2O2

C 2HgO --> 2Hg + O2

A 100-kg student kicks a 1.5-kg ball with a force of 450 N. What force does the ball apply on the student? A 4.5 N B 300 N C 450 N D 675 N

C 450 N

An object has a mass of 12.8 kg and a velocity of 8.4 m s. What is the kinetic energy of the object? A 53.8 J B 107.5 J C 451.6 J D 903.2 J

C 451.6 J

This graph shows the motion of a car. What distance has the car traveled in 10 s? A 0 m B 8 m C 50 m D 100 m

C 50 m

An atom has 29 protons, 29 electrons, and 35 neutrons. What is the mass number of the atom? A 29 B 35 C 64 D 93

C 64

Which pair of elements has the most physical and chemical properties in common? A Ge and Se B K and Kr C Al and Ga D Ba and Bi

C Al and Ga

This chart lists the densities of various gemstones Opal - 2.20 Diamond - 3.01 Garnet - 3.15 Topaz - 3.50 A gemstone has a mass of 6.24 g and a volume of 1.98 cm^3 What is the identity of the gemstone? A Opal B Diamond C Garnet D Topaz

C Garnet

What happens to the kinetic energy and gravitational potential energy of a ball during free fall? A Gravitational potential energy and kinetic energy both increase. B Gravitational potential energy and kinetic energy both decrease. C Gravitational potential energy decreases, and kinetic energy increases. D Gravitational potential energy increases, and kinetic energy decreases.

C Gravitational potential energy decreases, and kinetic energy increases.

This chart represents the melting points and boiling points of some substances. Which substance is a gas at 45C? A Ethanol B Hexane C Methane D Methanol

C Methane

Which chemical formula represents magnesium phosphate? A MgPO4 B Mg2PO4 C Mg3(PO4)2 D Mg2(PO4)3

C Mg3(PO4)2

Which is true of infrared waves? A They have shorter wavelengths than X-rays. B They give off more energy than gamma rays. C They have longer wavelengths than ultraviolet waves. D They have higher frequencies than visible light waves.

C They have longer wavelengths than ultraviolet waves.

Which situation provides the best evidence that a chemical reaction is taking place? A. A metal strip bends when heated. B A solution freezes in the freezer. C Two solutions mixed in a beaker produce a solid. D A chemical completely dissolves in water and the temperature of the solution remains constant.

C Two solutions mixed in a beaker produce a solid.

A metal spoon is used to stir a pot of boiling water. The person holding the metal spoon feels the spoon get hot. Which best describes the transfer of heat in the spoon? A radiation B electrical C conduction D convection

C conduction

Which accounts for most of the mass of an atom? A electrons B protons C neutrons and protons D electrons and neutrons

C neutrons and protons

What type of chemical reaction is represented by this equation? 2Li (s) + 2H2O (l) -> 2LiOH (aq) + H2 (g) A decomposition B double replacement C single replacement D synthesis

C single replacement

How could 3 magnets be arranged end-to-end so that there will be no attraction between them? a. N-S S-N N-S b. S-N N-S N-S c. N-S N-S S-N d. S-N S-N S-N

a. N-S S-N N-S

Which one of these scientists described a model of the atom that included energy levels? a. Dalton b. Bohr c. Newton d. Thomson

b. Bohr

A student builds an electromagnet using a variable power source and 40 turns of wire. The electromagnet is used to pick up metal paper clips. The student changes the voltage and counts the number of paper clips that are picked up. Which table could be the data the student collected? a. Voltage - 3, 6, 9, 12 Number of Paper Clips - 24, 12, 8, 6 b. Voltage - 3, 6, 9, 12 Number of Paper Clips - 27, 24, 21, 18 c. Voltage - 3, 6, 9, 12 Number of Paper Clips - 10, 20, 20, 10 d. Voltage - 3, 6, 9, 12 Number of Paper Clips - 9, 18, 27, 36

d. Voltage - 3, 6, 9, 12 Number of Paper Clips - 9, 18, 27, 36