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Thermal Energy
Test Description: Science test review
Instructions: Answer all questions to get your test result.
1) Energy _________ between two objects when a thing is in contact with another thing.
A
is destoyed
B
decreases
C
is transferred
D
is created
2) The state in which a system is stable and the temperatures are the same.
A
equilibrium
B
temperature
C
average
D
collision
3) When a thing gains or loses energy _______
A
energy is given to another object
B
energy is created and destroyed between the two things.
C
the energy is lost between all the molecules of the thing.
D
the energy gained or lost is divided among all the molecules of the thing.
4) When a thing gets hotter the molecules ____________
A
the molecules are moving slower and have less kinetic energy.
B
the molecules are becoming stable and reaching an equilibrium.
C
the molecules are transfered out of the system into another system.
D
the molecules are moving faster and have more kinetic energy.
5) When you put an ice cube in a cup of hot soup, where does the transfer of energy occur?
A
Energy from the soup causes the molecules of the ice cube to slow down.
B
Energy is transferred from the hot soup to the cold ice cube.
C
The energy from the ice cube causes the soup to warm up.
D
Energy is transferred from the cold ice cube to the hot soup.
6) If you have a cup of hot tea and a warm bathtub, which one will cool down faster and why?
A
The warm bathtub will cool down slower because it has fewer molecules than the tea.
B
The warm bathtub will cool down faster because it has more molecules than the tea.
C
The hot tea will cool down faster because it has fewer molecules than the bathtub.
D
The warm bathtub will cool down faster because it has fewer molecules than the tea.
7) When an ice cube is heated up, what happens to the speed of the molecules?
A
Molecules remain the same speed.
B
Molecules slow down and form a solid thing.
C
Molecules move slower when they are warmer and get closer together.
D
Molecules move faster when they are warm up and spread apart.
8) What is the definition of temperature?
A
The amount of total kinetic energy of a thing.
B
The total speed of the molecules of a thing.
C
The average kinetic energy of the molecules of a thing.
D
How hot or cold something is.
9) When a thing gets colder the molecules ___________
A
slow down and get further apart.
B
speed up and get further apart.
C
speed up and get closer together.
D
slow down and get closer together.
10) When two things are in contact, their molecules collide and _________
A
kinetic energy is created.
B
kinetic energy transfers from slower to faster moving molecules.
C
kinetic energy is destroyed.
D
kinetic energy transfers from faster to slower moving molecules.
11) Which of the following objects with the same temperature have more total kinetic energy (thermal energy)? bathtub of hot water, a cup of hot cocoa, or a bucket of hot water
A
The bathtub because it has more molecules.
B
The hot cocoa because it has more molecules.
C
The bucket because is has more molecules.
D
They all have the same amount of total kinetic energy.
12) What is the meaning of transfer?
A
To create energy and then destroy it.
B
To stay in the same place and not move.
C
To reach a stable state such as an equilibrium.
D
To move from one place to another or from one object to another
13) What does kinetic energy mean?
A
what is used to determine the size of an object
B
when an object changes from a gas to a liquid
C
the speed of the molecules
D
energy that is used for electricity
14) The liquid water molecules speed up so fast that they change phases, it turns into _______
A
plasma
B
a solid
C
a gas
D
a liquid
15) What happens to the phase of an ice cube when it is warmed up?
A
When air molecules are warmed up from the sun, they move faster and change from a liquid to a gas..
B
When air molecules are warmed up from the sun, the molecules begin to slow down.
C
When air molecules are warmed up from the sun, they move fast enough ice can change from a solid to a liquid.
D
When air molecules are warmed up from the sun, the liquid turns into a solid.
*select an answer for all questions
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