Question 1

VOCAB: 
a measure of how hot or cold something is

Accepted Answer

TEMPERATURE

Question 2

VOCAB:
a group of atoms joined together in a particular way

Accepted Answer

MOLECULE

Question 3

VOCAB:
a number that summarizes a set of data.  This can be computed by adding all the numbers in a list and then dividing by the number of numbers in the list.

Accepted Answer

AVERAGE

Question 4

VOCAB:
to reach a conclusion using evidence and reasoning

Accepted Answer

INFER

Question 5

VOCAB:
the energy that an object has because it is moving

Accepted Answer

KINETIC ENERGY

Question 6

VOCAB:
the moment when 2 objects hit each other

Accepted Answer

COLLISION

Question 7

VOCAB:
set of interacting parts forming a complex whole

Accepted Answer

SYSTEM

Question 8

VOCAB:
when something becomes different over time

Accepted Answer

CHANGE

Question 9

VOCAB:
a balanced state in which a system is stable, such as when two or more samples are at the same temperature

Accepted Answer

EQUILIBRIUM

Question 10

VOCAB:
when something stays mostly the same over time

Accepted Answer

STABILITY

Question 11

VOCAB:
to move from one object to another or one place to another

Accepted Answer

TRANSFER

Question 12

When an object warms up, the kinetic energy of the object:

Accepted Answer

Increases

Question 13

When an object cools down, the kinetic energy of the object:

Accepted Answer

Decreases

Question 14

When an object cools down, the molecules’ movement:

Accepted Answer

Slows down

Question 15

When an object warms up, the molecules’ movement:

Accepted Answer

Speeds up

Question 16

What causes the difference in temperatures?

Accepted Answer

The change in speed/kinetic energy of the molecules

Question 17

How do air conditioners cool the air?

Accepted Answer

By slowing down the speed of molecules inside a building

Question 18

What happens to the energy removed from the air inside a room by an air conditioner?

Accepted Answer

It is pushed outside

Question 19

When a fast moving molecule collides with a slow moving molecule, what happens to the kinetic energy?

Accepted Answer

The kinetic energy is transferred to the slow moving molecule

Question 20

What is the result when energy is transferred from a warm forehead to a cool washcloth?

Accepted Answer

The energy will transfer to the washcloth causing it to increase in temperature

Question 21

Why do molecules change speed?

Accepted Answer

Molecules speed up when they get energy from other molecules and slow down when they give energy to other molecules

Question 22

How do molecules in a substance get energy?

Accepted Answer

They get molecules from other molecules

Question 23

What does this graph tell you about the temperature of Sample A over time?

Accepted Answer

Sample A’s temperature decreases

Question 24

What can you infer about what the temperature graph of Sample B would look like?

Accepted Answer

Sample B’s temperature increases

Question 25

Before coming into contact, the molecules of Sample A has ______________ kinetic energy (Than/as) the molecules of Sample  B.

Accepted Answer

more, than

Question 26

Before coming into contact, the molecules of Sample A has a ________________ temperature (Than/as) the molecules of Sample B.

Accepted Answer

higher, than

Question 27

Once the two substances merge, what will happen to the temperature of both substances?

Accepted Answer

They will even out to be the same

Question 28

What is Newton's Cradle?

Accepted Answer

A toy with spheres hanging from a frame

Question 29

Why do the spheres in the middle of a Newton’s Cradle stay in place?

Accepted Answer

They are blocked by the spheres next to them

Question 30

How do molecules experience a change in kinetic energy during a collision?

Accepted Answer

Energy is transferred from one molecule to the other

Question 31

How is kinetic energy transferred in a a Newton’s Cradle?

Accepted Answer

The energy is transferred from one sphere to another when they collide

Question 32

When 2 substances merge and reach a balanced temperature, they are in:

Accepted Answer

Equilibrium

Question 33

Use the following vocabulary to answer this question: Why does the transfer of energy between two substances stop?
-Equilibrium
-Kinetic Energy
-Collision
-Molecule
-Transfer

Accepted Answer

Through the collision of molecules, the warmer substance will transfer kinetic energy to the cooler one. Once the substances reach equilibrium and have the same average kinetic energy, the energy transfer stops.

Question	Answer
VOCAB: a measure of how hot or cold something is	TEMPERATURE
VOCAB: a group of atoms joined together in a particular way	MOLECULE
VOCAB: a number that summarizes a set of data. This can be computed by adding all the numbers in a list and then dividing by the number of numbers in the list.	AVERAGE
VOCAB: to reach a conclusion using evidence and reasoning	INFER
VOCAB: the energy that an object has because it is moving	KINETIC ENERGY
VOCAB: the moment when 2 objects hit each other	COLLISION
VOCAB: set of interacting parts forming a complex whole	SYSTEM
VOCAB: when something becomes different over time	CHANGE
VOCAB: a balanced state in which a system is stable, such as when two or more samples are at the same temperature	EQUILIBRIUM
VOCAB: when something stays mostly the same over time	STABILITY
VOCAB: to move from one object to another or one place to another	TRANSFER
When an object warms up, the kinetic energy of the object:	Increases
When an object cools down, the kinetic energy of the object:	Decreases
When an object cools down, the molecules’ movement:	Slows down
When an object warms up, the molecules’ movement:	Speeds up
What causes the difference in temperatures?	The change in speed/kinetic energy of the molecules
How do air conditioners cool the air?	By slowing down the speed of molecules inside a building
What happens to the energy removed from the air inside a room by an air conditioner?	It is pushed outside
When a fast moving molecule collides with a slow moving molecule, what happens to the kinetic energy?	The kinetic energy is transferred to the slow moving molecule
What is the result when energy is transferred from a warm forehead to a cool washcloth?	The energy will transfer to the washcloth causing it to increase in temperature
Why do molecules change speed?	Molecules speed up when they get energy from other molecules and slow down when they give energy to other molecules
How do molecules in a substance get energy?	They get molecules from other molecules
What does this graph tell you about the temperature of Sample A over time?	Sample A’s temperature decreases
What can you infer about what the temperature graph of Sample B would look like?	Sample B’s temperature increases
Before coming into contact, the molecules of Sample A has ______________ kinetic energy (Than/as) the molecules of Sample B.	more, than
Before coming into contact, the molecules of Sample A has a ________________ temperature (Than/as) the molecules of Sample B.	higher, than
Once the two substances merge, what will happen to the temperature of both substances?	They will even out to be the same
What is Newton's Cradle?	A toy with spheres hanging from a frame
Why do the spheres in the middle of a Newton’s Cradle stay in place?	They are blocked by the spheres next to them
How do molecules experience a change in kinetic energy during a collision?	Energy is transferred from one molecule to the other
How is kinetic energy transferred in a a Newton’s Cradle?	The energy is transferred from one sphere to another when they collide
When 2 substances merge and reach a balanced temperature, they are in:	Equilibrium
Use the following vocabulary to answer this question: Why does the transfer of energy between two substances stop? -Equilibrium -Kinetic Energy -Collision -Molecule -Transfer	Through the collision of molecules, the warmer substance will transfer kinetic energy to the cooler one. Once the substances reach equilibrium and have the same average kinetic energy, the energy transfer stops.

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SCIENCE CH 2 TEST