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WorksheetsTE CJ Reteach 2023
Total questions: 29
Worksheet time: 58mins
Why do molecules change speed?
Molecules change speed when they are at equilibrium
Molecules speed up when they get energy from other molecules
Sample A is hotter then sample B
Molecules slow down when they give energy to other molecules
A 65 degree sample makes contact with a 35 degree sample, how will the systems react?
The red will get hotter along with the black
The red will get hotter with energy from the black until they are equal
The black will get colder with energy from red until they equal
The black will share energy with the red forever
Why does the transfer of energy between two colliding things stop?
Molecules stop transferring energy when colliding systems reach equilibrium
When the two non-colliding things get equally hot molecules make energy
Molecules make more kinetic energy until it is balanced
The molecules of a system destroy energy when the system is balanced
When two things are in contact, kinetic energy transfers...
from slow-moving molecules to faster-moving molecules.
from fast-moving molecules to slower-moving molecules.
between the two things.
nowhere and disappears
Absolute zero is...
when the temperature is 0 degrees Celsius
when there are no molecules
all of the choices
when molecules have zero molecular movement.
Even though they both are at the same temperature, which one has more thermal energy? The tea pot or the tea cup?
Lava is hot liquid rock. When lava flows over solid ground, the solid ground beneath it increases in temperature. What happens to the molecules in the solid ground when the temperature is increasing?
More heat molecules combine with the molecules in the ground.
The cold energy of the molecules in the ground decreases.
The energy of the molecules in the ground decreases.
The energy of the molecules in the ground increases.
What is the average amount of energy for these molecules?
10
80
8
800
Claude is in the kitchen cooking and is going to stack one pan on top of another pan. The two pans are the same size and have the same number of molecules. The diagram above shows the pans now, before they touch each other.
How does the temperature of the top pan compare with the temperature of the bottom pan now, and what will happen after the pans have been touching for a while?
Before the pans touch, the bottom pan is hotter than the top pan. Once the pans are touching, the bottom pan will transfer kinetic energy to the molecules in the cooler top pan until both pans reach the same temperature, which will be in between their starting temperatures.
Before the pans touch, the bottom pan is hotter than the top pan. Once the pans are touching, the cooler top pan will gain kinetic energy until the molecules in both pans have an energy of 70, because hotter things increase the temperature of cooler things.
Before the pans touch, the bottom pan is cooler than the top pan. Once the pans are touching, the top pan will transfer kinetic energy to the molecules in the cooler bottom pan until both pans reach the same temperature, which will be in between their starting temperatures.
Before the pans touch, the two pans are different temperatures. Once the pans are touching, both kinetic energy and cold energy will transfer between the molecules in the two pans until both pans reach the same temperature, which will be in between their starting temperatures.
An architect is stacking pieces of plastic to make two columns in a model building. The diagram above shows the pieces of plastic before they touch each other.
After they have been touching for a while, which of the two top plastic pieces will be cooler, and why?
The larger top plastic piece will be cooler than the smaller top plastic piece. It started with more total energy, so less energy had to transfer for both pieces in the stack to reach the same total energy.
The larger top plastic piece will be cooler than the smaller top plastic piece, because the energy that transferred to it was spread out over more molecules.
Both pieces will be the same temperature, because both of the bottom pieces had the same amount of energy to transfer and the molecules in the top plastic start with the same energy.
The smaller top plastic piece will be cooler than the larger top plastic piece, because less energy has to transfer for the molecules to reach the same temperature as the molecules of the bottom plastic.
Jason put an apple on top of an ice pack in his lunch bag. By lunchtime the temperature of his apple had decreased. What happened to the molecules in the apple when the temperature of the apple decreased?
The energy of the molecules in the apple decreased.
The cold energy of the molecules in the apple increased.
The apple lost heat molecules.
The energy of the molecules in the apple increased.
Aki is playing cards and is about to put one card on top of another. Both cards are the same size and have the same number of molecules. The diagram above shows the cards now, before they touch each other.
How does the temperature of the top card compare with the temperature of the bottom card before the cards touch, and what will happen after the cards have been touching for a while?
Before the cards touch, the top card is cooler than the bottom card. Once the cards are touching, the bottom card will transfer kinetic energy to the molecules in the cooler top card until both cards reach the same temperature, which will be in between their starting temperatures.
Before the cards touch, the top card is hotter than the bottom card. Once the cards are touching, the cooler bottom card will gain kinetic energy until both cards’ molecules have an energy of 28, because hotter things increase the temperature of cooler things.
Before the cards touch, the top card is hotter than the bottom card. Once the cards are touching, the top card will transfer kinetic energy to the molecules in the cooler bottom card until both cards reach the same temperature, which will be in between their starting temperatures.
Before the cards touch, the two cards are different temperatures. Once the cards are touching, both kinetic energy and cold energy will transfer between the molecules in the two cards until both cards reach the same temperature, which will be in between their starting temperatures.
Geothermal power plants send water through pipes deep underground where it is hot. This causes the temperature of the water to increase.
What happens to the molecules of the water when the temperature of the water increases?
The energy of the water molecules decreases.
The energy of the water molecules increases.
The cold energy of the water molecules decreases.
More heat molecules combine with the water molecules.
Kekoa made a pot of applesauce, then put it into containers to store it. The containers are placed in two separate stacks. The diagram above shows the containers of applesauce before they touch each other.
After a while, which of the two top containers will be cooler, and why?
The smaller top container will be cooler than the larger top container, because less energy has to transfer for the molecules to reach the same temperature as the molecules of the bottom container.
Both top containers will be the same temperature, because both of the bottom containers have the same amount of energy to transfer and the molecules in the top containers started with the same energy.
The larger top container will be cooler than the smaller top container. It started with more total energy, so less energy has to transfer for both containers in the stack to reach the same total energy.
The larger top container will be cooler than the smaller top container, because the energy that transferred to it is spread out over more molecules.
Average
a number that summarizes a set of data and by adding all the numbers in a list and then dividing by the quantity of numbers.
tiny organisms that are made of a single cell
the ability to make things move or change
Kinetic Energy
the ability to make things move or change
energy that moves
to move from one object to another or one place to another
System
a set of interacting parts forming a complex whole
a small part that is meant to show what the whole is like
when something stays mostly the same over time
transfer
energy that moves
to move from one object to another or one place to another
the ability to make things move or change
collision
when something stays mostly the same over time
a group of atoms joined together in a particular way
the moment when two objects hit each other
stability
a building in which livestock, especially horses, are kept.
when something stays mostly the same over time
the strength to stand or endure
molecule
anything that has mass and takes up space (volume)
a group of atoms joined together in a particular way
tiny particles called protons, neutrons and electrons.
thermal energy
The total energy of all the particles of an object measured with temperature.
the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.
the energy that it possesses due to its motion.
temperature
the amount of movement that atoms store
The transfer of energy from one form to another
A measure of the average speed of the molecules of a substance.
Infer
to state your opinion
to reach a conclusion using evidence and reasoning
to write your answers
Equilibrium
a balanced state in which a system is stable, such as when two samples are at the same temperature
when two things exchange molecules
when two things are balanced and weigh the same
change
when something becomes different over time
when something reaches equilibrium
when something stops growing
When two samples come in contact the energy will flow
from the cold one to the warmer one.
from the warmer one to the cooler one.
energy does not move.
The molecules of a system will transfer energy until the system reaches a stable state known as . . .
change
equilibrium
thermal energy
Energy can't be created or destroyed.
true
false
