Question 1

Why is condensing water vapor to form liquid water considered a physical change?

Accepted Answer

The water changes its state

Answer

The water changes its identity

Answer

The ice has some new properties

Answer

The vapor floats above the liquid water

Question 2

In order for liquid methanol to form gas and enter the air, what must happen to the methanol?

Accepted Answer

It needs to gain energy

Answer

It must undergo an exothermic change

Answer

It  must increase its presssure

Answer

It needs to condense

Question 3

Which of the following would happen at a lower temperature?

Accepted Answer

Particles in an object move slower

Answer

Particles in an object have more energy

Answer

Gas particles bump into walls more often

Answer

Gas expands

Question 4

Which of the following happens to the particles when a solid becomes a liquid?

Accepted Answer

They spread apart from one another

Answer

The pack closer together

Answer

They create energy

Answer

They move less

Question 5

What is the reverse phase change of melting?

Accepted Answer

Freezing

Answer

Sublimation

Answer

Vaporization

Answer

Fusion

Question 6

Mr. Spitler accidentally drops his favorite pen in a  beaker of water. The pen has a mass of 25 g and the water level in the beaker rises from 175 mL to 198 mL. Determine the density of Mr. Spitler's pen.

Accepted Answer

1.09 g/mL

Answer

0.92 mL/g

Answer

0.92g/mL

Answer

7.92 g/mL

Question 7

What state of matter would be described as having highly energized, charged particles which move extremely fast?

Accepted Answer

Plamsa

Answer

Liquid

Answer

Solid

Answer

Gas

Question 8

Which of the following best describes the motion of particles in a solid?

Accepted Answer

They vibrate and rotate in place

Answer

The move independently of one another

Answer

They slide past one another

Answer

They are able to overcome attraction and move freely

Question 9

Which of the following statements is NOT true?

Accepted Answer

In all states of matter, particles move at the same speed

Answer

Every state of matter is made up of particles

Answer

All particles are made up of atoms and molecules

Answer

In all states of matter the particles are moving

Question 10

Which of the following statements describes a soccer ball under high pressure (fully inflated) compared to a soccer ball under low pressure (deflated)?

Accepted Answer

In the fully inflated soccer ball there are more particles of gas

Answer

In a fully inflated soccer ball the particles of gas have less energy

Answer

In a fully inflated soccer ball the particles of gas only collide with one another

Answer

In a fully inflated soccer ball the force exerted on the inside if the ball is lower

Question 11

Which of the following examples is endothermic?

Accepted Answer

Water boiling in a large pot

Answer

A pond freezing in the winter time

Answer

Gas particles condensing on a cold drink

Answer

Air in a bike tire gaining pressure on a hot day

Question 12

As the temperature decreases from 10 C to 35 C the material ________ heat and its energy ______________ as the material goes through melting to become a liquid.

Accepted Answer

absorbs...increases

Answer

multiplies it...is divided

Answer

Stays the same...decreases

Answer

releases...stays the same

Question 13

What state of matter is present at 40 C?

Accepted Answer

Liquid

Answer

Plasma

Answer

It is a phase change

Answer

Solid

Question 14

What two phase changes are possible at 50 C?

Accepted Answer

Vaporization & Condensation

Answer

Freezing & Melting

Answer

Ionization & Sublimation

Answer

Melting  & Condensation

Question 15

In order for a substance to move from C to D, what has to occur?

Accepted Answer

It must undergo an endothermic change and absorb energy

Answer

It must undergo an exothermic  change and release energy

Answer

It must undergo an exothermic change and absorb energy

Answer

It must undergo an endothermic change and release energy

Question 16

What is the name for a phase change of a solid to a gas?

Accepted Answer

Sublimation

Answer

Deposition

Answer

Condensation

Answer

Ionization

Question 17

Jeremy is learning about balloon animals during his classes at Clown School.  He has always wondered why balloons are able to be twisted into shapes. Which of the following is the best explanation for why this occurs?

Accepted Answer

Particles of gas are able to be compressed

Answer

The volume of a gas is always constant

Answer

Volume is measured in two dimensions

Answer

Force changes how many particles there are in the balloon

Question 18

What is the relationship between the volume and pressure of a gas when temperature is constant?

Accepted Answer

As volume increases pressure decreases

Answer

As volume increase pressure stays the same

Answer

As volume increases pressure increases

Answer

As volume decreases pressure decreases

Question 19

Which of the following experiments could you perform to investigate the effect that temperature has on the volume of gas?

Accepted Answer

Measure the volume of a balloon filled with room temperature air. Place the balloon in a freezer for an hour and then measure its volume again.

Answer

Inflate one balloon to a large volume and another balloon to a small volume. Measure the temperature of the air released from both balloons.

Answer

Stretch a balloon over the top of a beaker filled with baking soda and vinegar and observe how the balloon changes volume.

Answer

Measure the pressure of the air in a tire on a cold day, a warm day, and a hot day

Question 20

SCUBA divers are at risk of developing a life-threatening condition called Decompression Sickness (a.k.a. “the Bends”) if they return to the surface too quickly.  Decompression sickness is caused by bubbles of gas dissolved in the blood stream.  These bubbles expand in the blood stream, increasing in volume, and block the flow of blood throughout the body.  As divers descend farther underwater, the pressure from the weight of all the water above them increases tremendously which compresses the gases in their blood.  How can a diver rising quickly back to the surface cause Decompression Sickness?

Accepted Answer

As a diver rises, the pressure on their body decreases which allows the volume of the gas to increase.

Answer

As a diver rises, the pressure on their body increases which allows the volume of the gas to increase

Answer

As a diver rises, the pressure on their body increases which allows the volume of the gas to decrease.

Answer

As a diver rises, the pressure on their body decreases which allows the volume of the gas to decrease.

Question 21

Which experiment below would result in a scientist creating a graph showing the relationship between temperature and volume like the one seen in the picture?

Accepted Answer

A scientist blows up a balloon inside a freezer and measures its volume. She then takes it outside and puts it in the hot sun for 10 minutes. She measure the volume once every minute and plots her data.

Answer

A scientist uses a pressure gauge to measure the amount of pressure in a tank of nitrogen gas. They expel some of the nitrogen from the tank into a balloon  and measure the pressure again.

Answer

A scientist measures the pressure of an aerosol can at room temperature. Behind the protection of a blast shield, he uses a flame to slowly heat the aerosol can for 10 minutes while measuring the pressure every minute. He plots the data on a graph.

Answer

A scientist measures the temperature of the air on a sunny day and a cloudy day.

Question 22

The relationship between pressure and volume is ___________, which means as one variable increases the other will decrease.

Accepted Answer

Inverse

Answer

Direct

Answer

Variable

Answer

Systematic

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