Physical Science Unit 2

If 100 grams of vinegar and 5 grams of baking soda are poured in a container, a small amount of gas will be produced. What will the final mass of the products be if the gas is trapped in the container?

105 grams

Which model illustrates a compound? (refer to model)

2nd picture with one black dot and one white dot adjoined together

A 20-N force acts on a 5-kg object at rest. How fast will the object accelerate on a frictionless surface?

4m/s squared

A rock rolls down a hill. The speed of the rock as it rolls is graphed below. (refer to the graph) Approximately how much faster is the rock rolling at six seconds than it is at four seconds?

50 cm/sec

Which set of elements below is the MOST similar in chemical behavior? (picture of a Periodic Table of the Elements)

Be, Ca, Ra

The law that states that atoms do not appear or disappear in chemical reactions, is the Law of _______________.

Conservation of Matter

As the loudness of a sound wave increases, which will also increase?

amplitude

Aluminum is an element. Which of the following BEST describes the smallest particle of aluminum that retains all the properties of aluminum?

an atom

If a book sitting on a flat table starts to move horizontally, it is MOST likely moving because

an unbalanced force is being applied

Four significantly different household appliances (blender, mixer, toaster, and food processor) are plugged into four outlets along a counter. Turning on or off one or more of the appliances does not affect the performance of the other appliances because the four appliances

are connected in parallel

Which of the following would best complete the concept map above? (refer to diagram on study guide)

atoms

Which statement BEST describes an atom?

atoms are the smallest particles of matter that are still elements

In a classroom demonstration, a teacher pours sulfuric acid on some granulated sugar in a beaker. Smoke rises and a strong smell is released. This demonstration is an example of what kind of change?

chemical

Scientists are studying how substance A and substance B react. When substance A and B are mixed, a substance different from A and B floats to the top of the solution. This is evidence that a (n) ____________.

chemical change occurred

A metal container on the stove gets hot by

conduction of heat energy

The diagram above shows light about to interact with "medium A." If "medium A" has the same optical properties as the air that the light is currently traveling in the light will__________. (refer to the diagram)

continue in a straight line

If a force of 6 newtons to the right and a force of 6 newtons to the left are acting upon a ball, the ball will

continue with the same velocity

The gravity of the Sun is 179 times that of the gravity of the Moon. Which of the following is the main reason that the Moon has a stronger gravitational effect on Earth's oceans and tides than does the Sun?

distance plays a greater role in gravitational force than mass

Calcium carbonate (CaCO3) is considered a compound because it is made up of two or more ____________.

elements

Atoms in _________ are free to move, colliding frequently.

gases

During a 4th of July celebration, scientists were measuring sound waves as the fireworks exploded. Which illustration indicates that the fireworks were becoming louder? (refer to illustration)

illustration where waveheight was steadily increasing

Which simple machine increases the distance over which a load travels and reduces the needed force?

inclined plane

The charts below show sound waves from a musical instrument. In which way is the sound wave in Chart 1 different from the sound wave in Chart 2? (refer to charts)

it has a lower frequency

Which of the following explains the reason that star appear to twinkle to the human eye?

light emitted by the stars bends as it travels through the atmosphere

The graph below shows four distance vs. time curves. Which line on the graph shows both an increase in speed and positive acceleration? (refer to the graph)

line 1

Elias is examining an unknown substance discovered within a meteorite called "compound X". He is using an electron microscope to examine the particles of the substance. The particles of compound X appear to be weakly attracted to each other and are able to slide past one another freely. Compound X is MOST likely a ___________.

liquid

Blood flows through the body in a network of arteries and veins. This physical flow is driven by which type of energy?

mechanical

In a gasoline-powered car, chemical energy from gasoline is transformed to make the car move. The motion of the car is what form of energy?

mechanical energy

Which of these materials transfers heat energy quickest?

metal

The MAJORITY of the elements found on the Periodic Table of the Elements are

metals

A student sets up this electrical circuit. The student then realizes that turning off one light turns off all the lights. In order to make it possible for each light to be turned on and off separately, the student should convert the circuit into (refer to picture)

parallel circuit

Mercury and gold are both metals. Unlike gold, mercury cannot be used to make jewelry because it is a liquid at room temperature. The difference in the state of matter of the two metals is an example of which type of property?

physical

Look at the drawing below of a bouncing ball. Which correctly identifies the sequence of the types of energy shown in the drawing? (refer to the picture)

potential, kinetic, kinetic, potential

Kara sees a purple car. She perceives the cart to be the color purple because

purple light is being reflected by the car

After two different elements are heated together, the product has different chemical properties. This is evidence that the two elements have _________.

reacted chemically

The spectrum of visible light can be seen in a rainbow because white light is

refracted and dispersed

When one form of energy is converted into other forms of energy, the total amount of energy

remains constant throughout the conversion

LIGHT information is transferred into ELECTRICAL information at which of the following structures in the eye?

rods and cones

When placed at equal distances apart, the greatest gravitational attraction will be between two

school buses (the biggest of all the items with the most mass)

The speed of sound is generally greatest in

solids and lowest in gases.

Which type of wave displaces its medium in the direction of its propagation?

sound

As energy is transformed in a system, the total amount of energy in the system

stays the same

Some students were on a tour exploring the inside of a cave. While the students were in the cave, they realized they heard an echo every time that they spoke. Which MOST likely caused the echo to occur?

the reflection of the sound waves

Definite evidence for a chemical reaction occurring would be a change in ___________.

the substances present

The drawing shows a waterfall flowing into a pool of water. (refer to picture)

the water has potential energy at the top of the waterfall and increasing kinetic energy as it falls

Which statement BEST describes the motion of the molecules of a solid object?

they vibrate in place within a fixed volume

A water wave that occurs in an ocean is an example of which type of wave?

transverse

When a rigid object is submerged in a fluid (completely or partially), there exists a (n) _________ on the object that is equal to the weight of the fluid that is displaced by the object.

upward force

A house uses a roof to carry away large amounts of rain efficiently. A roof composed of two attached inclined planes forms what type of simple machine?

wedge

The diagram illustrates the interaction of waves with the ocean floor. Which zone shows waves with the longest wavelength? (refer to diagram)

zone 1