Quiz about Phase Change Final Study Guide

Question 1

When you transfer energy into a substance, what happens to the temperature?

Accepted Answer

It increases

Answer

It stays the same

Answer

It decreases

Answer

It becomes negative

Question 2

Is burning a phase change?

Accepted Answer

It is a chemical reaction

Answer

Yes

Answer

Trick question none of these are right

Question 3

What happens to the kinetic energy of a substance when it transfers that energy to another substance?

Accepted Answer

It loses kinetic energy

Answer

It is converted to potential energy

Answer

It stays the same

Answer

It increases its kinetic energy

Question 4

What is kinetic energy?

Accepted Answer

the energy that an object has because it is moving

Answer

a pull between two molecules that is always the same for a substance

Answer

the way molecules in a substance move around relative to each other

Answer

a group of atoms joined together in a particular way

Question 5

Scenario 1: A student wants to test how different amounts of water affect plant growth.

Is this the Independent or Dependent variable?

A student adds different amounts of water to each plant to see how it grows.

Accepted Answer

Independent Variable

Answer

Dependent Variable

Question 6

Scenario 2: A researcher investigates if the temperature of water affects how fast sugar dissolves.

Is this the Independent or Dependent variable?

A researcher records how quickly the sugar dissolves.

Accepted Answer

Dependent Variable

Answer

Independent Variable

Question 7

Scenario 3: A teacher wants to know if study time affects students' test scores.

Is this the Independent or Dependent variable?

The teacher has students study for different amounts of time.

Accepted Answer

Independent Variable

Answer

Dependent Variable

Question 8

Scenario 4: An experiment is conducted to determine whether the type of exercise affects heart rate.

Is this the Independent or Dependent variable? 
The researcher measures the heart rate of each participant.

Accepted Answer

Dependent Variable

Answer

Independent Variable

Question 9

Scenario 5: A student wants to know if sunlight exposure affects the number of flowers a plant produces.

Is this the Independent or Dependent variable? 
A student varies the amount of sunlight given to each plant.

Accepted Answer

Independent Variable

Answer

Dependent Variable

Question 10

Scenario 6: A scientist is testing how fertilizer type impacts crop yield.

Is this the Independent or Dependent variable? 
The scientist measures the crop yield for each type of fertilizer.

Accepted Answer

Dependent Variable

Answer

Independent Variable

Question 11

Scenario 7: A researcher is examining if the amount of sleep affects memory retention.

Is this the Independent or Dependent variable? 
Participants are given different amounts of sleep each night.

Accepted Answer

Independent Variable

Answer

Dependent Variable

Question 12

Scenario 8: A student wonders if the temperature of a classroom impacts student focus.

Is this the Independent or Dependent variable? 
The student observes the focus level of students.

Accepted Answer

Dependent Variable

Answer

Independent Variable

Question 13

Scenario 9: A chef wants to see if cooking time affects the texture of pasta.

Is this the Independent or Dependent variable? 
The chef changes the cooking time for the pasta.

Accepted Answer

Independent Variable

Answer

Dependent Variable

Question 14

Scenario 10: A researcher is interested in whether music volume affects productivity.

Is this the Independent or Dependent variable? 
The researcher changes the volume of the music.

Accepted Answer

Independent Variable

Answer

Dependent Variable

Question 15

What is an independent variable in an experiment?

Accepted Answer

A. The factor that is changed or controlled by the experimenter

Answer

B. The factor that is measured or observed

Answer

C. The variable that remains constant

Answer

D. The conclusion of the experiment

Question 16

What is an dependent variable in an experiment?

Accepted Answer

B. The factor that is measured or observed

Answer

A. The factor that is changed or controlled by the experimenter

Answer

C. The variable that remains constant

Answer

D. The conclusion of the experiment

Question 17

Which of the following best defines a dependent variable?

Accepted Answer

B. It is the result or outcome that is measured

Answer

A. It is what you change in the experiment

Answer

C. It is the control group

Answer

D. It is the variable that is not measured

Question 18

In the vinegar and baking soda lab, which was the independent variable?

Accepted Answer

B. Amount of baking soda

Answer

A. Amount of vinegar

Answer

C. Size of the container

Answer

D. Temperature of vinegar

Question 19

What is a key difference between an independent and a dependent variable?

Accepted Answer

B. The independent variable is changed, while the dependent variable is measured

Answer

A. The independent variable is measured, while the dependent variable is controlled

Answer

C. Both are kept constant during the experiment

Answer

D. The dependent variable is manipulated, while the independent variable is observed

Question 20

Article Question: What happens to chocolate when it's placed near a campfire, and why does it change?

Accepted Answer

It melts because heat makes the molecules move around more.

Answer

It burns because its molecules react with oxygen.

Answer

It freezes because the fire removes energy.

Answer

It evaporates because the temperature is too high.

Question 21

Article Question: What is the difference between burning and melting?

Accepted Answer

Melting is a phase change, and burning is a chemical reaction.

Answer

Melting turns something into gas, and burning turns it into liquid.

Answer

Burning is a phase change, and melting is a chemical reaction.

Answer

Both burning and melting are chemical reactions.

Question 22

What is a molecule?

Accepted Answer

a group of atoms joined together in a particular way

Answer

the energy that an object has because it is moving

Answer

a pull between two molecules that is always the same for a substance

Answer

the way molecules in a substance move around relative to each other

Question 23

What is phase?

Accepted Answer

a noticeably different form or state of the same substance

Answer

the way molecules in a substance move around relative to each other

Answer

a pull between two molecules that is always the same for a substance

Answer

the energy that an object has because it is moving

Question 24

What does it mean to refute something?

Accepted Answer

to provide evidence that goes against a claim

Answer

the energy that an object has because it is moving

Answer

a pull between two molecules that is always the same for a substance

Answer

the way molecules in a substance move around relative to each other

Question 25

What is scale?

Accepted Answer

the relative size of things

Answer

a pull between two molecules that is always the same for a substance

Answer

the energy that an object has because it is moving

Answer

the way molecules in a substance move around relative to each other

Question 26

A solid holds its shape and does not take 
the shape of its container.

Accepted Answer

True

Answer

False

Question 27

What state of matter is this?

Accepted Answer

Soild

Answer

Gas

Answer

Liquid

Question 28

What state of matter is this?

Accepted Answer

Liquid

Answer

Gas

Answer

Soild

Question 29

What state of matter is this?

Accepted Answer

Gas

Answer

Liquid

Answer

Soild

Question 30

What is freedom of movement?

Accepted Answer

the way molecules in a substance move around relative to each other

Answer

the energy that an object has because it is moving

Answer

a group of atoms joined together in a particular way

Answer

a pull between two molecules that is always the same for a substance

Question 31

Article Question: What planet does Titan orbit around?

Accepted Answer

Saturn

Answer

Jupiter

Answer

Earth

Answer

Mars

Question 32

Article Question: How far is Titan from the sun?

Accepted Answer

866 million miles

Answer

93 million miles

Answer

500 million miles

Answer

1 billion miles

Question 33

Article Question: What is the thick, hazy atmosphere on Titan made of?

Accepted Answer

Methane gas

Answer

Water vapor

Answer

Oxygen

Answer

Carbon dioxide

Question 34

Article Question: What fills the lakes and seas on Titan?

Accepted Answer

Tar-like substances like methane and ethane

Answer

Water

Answer

Liquid oxygen

Answer

Carbon dioxide ice

Question 35

Article Question: Who was Robert Boyle, and what did he discover about air?

Accepted Answer

An English scientist who discovered that air is matter.

Answer

A French scientist who discovered gravity.

Answer

An Italian explorer who found new continents.

Answer

A German philosopher who studied the stars.

Question 36

Article Question: What two things did Boyle study to understand air?

Accepted Answer

Volume and pressure

Answer

Temperature and distance

Answer

Speed and direction

Answer

Weight and color

Question 37

Article Question: What happens to the pressure of a gas when the volume goes up?

Accepted Answer

Pressure goes down

Answer

Pressure stays the same

Answer

Pressure goes up

Answer

Pressure disappears

Question 38

Article Question: What tool did Boyle use to conduct his air pressure experiments?

Accepted Answer

A J-shaped glass tube

Answer

A thermometer

Answer

A scale

Answer

A beaker

Question 39

Article Question: What are the three phases of water?

Accepted Answer

Liquid, Gas, Solid

Answer

Liquid, Solid, Plasma

Answer

Gas, Vapor, Ice

Answer

Ice, Steam, Liquid

Question 40

Article Question: How do water molecules behave in the liquid phase compared to the solid phase?

Accepted Answer

They move freely in the liquid phase but are locked in place in the solid phase

Answer

They are locked in place in both phases

Answer

They flow past each other in both phases

Answer

They fly apart in both phases

Question 41

Article Question: What causes a flash flood in a desert, like Antelope Canyon?

Accepted Answer

Quick rainfall on dry, hard ground

Answer

Underground rivers

Answer

Intense windstorms

Answer

Overflow from nearby lakes

Question 42

Article Question: What happens to water vapor when it cools in the atmosphere?

Accepted Answer

It turns into liquid droplets

Answer

It becomes solid ice

Answer

It evaporates into thin air

Answer

It stays as a gas

Question 43

Article Question: Why do the walls of glacier caves in Iceland sparkle in the light?

Accepted Answer

The solid ice reflects light due to its rigid structure

Answer

The ice is transparent

Answer

Water vapor reflects light

Answer

The ice is covered in reflective minerals

Question 44

Article Question: How does the ice in glaciers change when it comes into contact with volcanic rock?

Accepted Answer

It melts into liquid water

Answer

It turns into vapor

Answer

It freezes even harder

Answer

It stays as solid ice

Question 45

Article Question: What phase change happens at Niagara Falls during cold winters?

Accepted Answer

Liquid to solid

Answer

Gas to liquid

Answer

Liquid to vapor

Answer

Solid to gas

Question 46

Article Question: How does water in geysers like Old Faithful change phase before an eruption?

Accepted Answer

Liquid water is heated and turns into gas

Answer

Liquid water evaporates directly into vapor

Answer

Water vapor turns into liquid

Answer

Solid ice melts into liquid water

Question 47

Article Question: What allows the water in Old Faithful to erupt every 90 minutes?

Accepted Answer

A buildup of water vapor that forces liquid water upward

Answer

Pressure from underground rivers

Answer

Continuous rainfall in the area

Answer

Movement of tectonic plates

Question 48

Article Question: Why does rainwater flow across the desert floor instead of soaking in during a flash flood?

Accepted Answer

The ground is too dry and hard to absorb the water quickly

Answer

The ground is too sandy to retain water

Answer

The water evaporates too fast

Answer

The water runs uphill

Question 49

Article Question: What is combustion, and what conditions are needed for it to happen?

Accepted Answer

Combustion happens when materials reach a certain temperature and react with oxygen.

Answer

Combustion happens when materials reach a low temperature and react with water.

Answer

Combustion happens when materials cool down and react with carbon dioxide.

Answer

Combustion happens when materials melt and freeze at the same time.

Question 50

Article Question: What is liquid oxygen, and why is it rare in everyday life?

Accepted Answer

Liquid oxygen is blue and can be made by scientists, but it's rare because it requires very cold temperatures to exist.

Answer

Liquid oxygen is a common liquid found in stores.

Answer

Liquid oxygen forms naturally in puddles on the ground.

Answer

Liquid oxygen is the same as water but in a different form.

Question 51

Article Question: Why is it harder to find liquid oxygen than liquid water?

Accepted Answer

Oxygen molecules are not attracted to each other very strongly, so it's harder to turn them into a liquid.

Answer

Water evaporates faster than oxygen.

Answer

Oxygen molecules are smaller than water molecules.

Answer

Oxygen is only found in gas form.

Question 52

Article Question: What process do scientists use to produce liquid oxygen from air?

Accepted Answer

Scientists lower the temperature of air in different tanks to separate gases and produce liquid oxygen.

Answer

Scientists increase the temperature of air to turn it into liquid.

Answer

Scientists mix air with chemicals to create liquid oxygen.

Answer

Scientists combine oxygen with nitrogen to produce liquid oxygen.

Question 53

Article Question: What other gases, like oxygen, are hard to condense into liquids, and why?

Accepted Answer

Hydrogen and methane, because they also have weak molecular attraction.

Answer

Nitrogen and carbon dioxide, because they are too heavy.

Answer

Water vapor and helium, because they are both light gases.

Answer

Nitrogen and oxygen, because they have very strong attraction.

Question 54

Article Question: Why does liquid water on Mars evaporate so quickly?

Accepted Answer

The air pressure on Mars is low, so water evaporates at a lower temperature.

Answer

The temperature on Mars is always very hot.

Answer

Mars has a lot of water, so it evaporates fast.

Answer

There is no sunlight on Mars to keep the water from evaporating.

Question 55

Article Question: Why does water on Mars evaporate at a lower temperature than on Earth?

Accepted Answer

The air pressure on Mars is lower, so water molecules escape more easily.

Answer

The gravity on Mars is stronger, so water evaporates faster.

Answer

Mars has more sunlight, which makes the water boil faster.

Answer

The water on Mars is different from the water on Earth.

Question 56

Article Question: How does a pressure cooker use air pressure to cook food faster?

Accepted Answer

It traps steam inside, raising the pressure and the temperature of the water.

Answer

It lets steam out to lower the temperature of the water.

Answer

It increases the amount of air pressure inside to cool the water down.

Answer

It uses a fan to make the water boil faster.

Question 57

Article Question: Why do scientists look for water when searching for life on Mars?

Accepted Answer

Water is a sign that there may have been or still is life on Mars.

Answer

Water is the most common element in the universe.

Answer

Scientists think Mars will eventually become like Earth.

Answer

Water creates more sunlight for plants to grow.

Phase Change Final Study Guide

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