WorksheetsThermal Energy Heat Transfer 2023
Total questions: 51
Worksheet time: 1hrs 9mins
In some places, hot water from underground can shoot up into the air through a hole in the ground. When this happens, the ground surrounding the water increases in temperature. What happens to the molecules in the ground when the temperature of the ground increases?
More heat molecules combine with the molecules in the ground.
The energy of the molecules in the ground decreases.
The energy of the molecules in the ground increases.
The cold energy of the molecules in the ground decreases.
A chef needs to increase the temperature of a food dish. She thinks she can do this by stacking another dish on top of it. She has three dishes to choose from for the top dish: A, B, and C.
Which one of these dishes would make the food dish the warmest when placed on top of it? As part of your answer, explain how the energy and temperature of both the top dish and the food dish will change when the food dish warms up, and why.
Use the information in the diagram to answer the question.
How does the temperature of the outer layer compare with the temperature of the inner layer before the layers touch? What will happen after the layers have been touching for a while?
Before the layers touch, the outer layer is hotter than the inner layer. Once the layers are touching, the outer layer will transfer kinetic energy to the molecules in the cooler inner layer until both layers reach the same temperature, which will be in between their starting temperatures.
Before the layers touch, the outer layer is hotter than the inner layer. Once the layers are touching, the cooler inner layer will gain kinetic energy until the molecules of both layers have an energy of 90, because hotter things increase the temperature of cooler things.
Joseph puts a piece of toast on a plate. The toast is hot from the toaster. When he puts the toast on the plate, the energy of the plate increases. What must be true of the energy of the toast?
Its energy stays the same while the energy of the plate increases.
Its energy decreases while the energy of the plate increases.
Its energy increases while the energy of the plate increases.
It is impossible to know without data on the number of molecules in each object.
Engineers design computers to cool down quickly so they do not break. What happens to the molecules in a computer when the temperature of the computer decreases?
The energy of the molecules in the computer increases.
The energy of the molecules in the computer decreases.
The cold energy of the molecules in the computer increases.
The cold energy of the molecules in the computer increases.
Select all that is true about the picture below. Object A has two molecules and Object B has 3 molecules. Select all that is true about the picture below.
Object A has a Total Kinetic energy of 4KJ
Object A and B are NOT in equilibrium
Object A and B are in equilibrium.
Object B is hotter than Object A
Object B has more thermal energy than Object A
Nistu is cooking rice in a pot. When she leaves the pot on the stove for a while, the temperature of the rice increases. What happens to the molecules of the rice when the temperature of the rice increases?
The energy of the molecules in the rice increases.
The cold energy of the molecules in the rice decreases.
The energy of the molecules in the rice decreases.
More heat molecules combine with the molecules in the rice.
The diagram above shows the pipes now, before they have touched. Use the information in the diagram to answer the question.
How does the temperature of the front pipe compare with the temperature of the back pipe before the pipes touch? What will happen after the pipes have been touching for a while?
Before the pipes touch, the two pipes are different temperatures. Once the pipes are touching, the kinetic energy and cold energy will transfer between the molecules in the two pipes until both pipes reach the same temperature, which will be in between their starting temperatures.
Before the pipes touch, the front pipe is hotter than the back pipe. Once the pipes are touching, the front pipe will transfer kinetic energy to the molecules in the cooler back pipe until both pipes reach the same temperature, which will be in between their starting temperatures.
Before the pipes touch, the front pipe is hotter than the back pipe. Once the pipes are touching, the cooler back pipe will gain kinetic energy until the molecules in both pipes have an energy of 100, because hotter things increase the temperature of cooler things.
The way the heat is moving inside the hot coffee is called...
convection
radiation
insulation
conduction
Which process is indicated by the letter X?
Which process is indicated by the letter Y ?
Which process is indicated by the letter Z?
How is temperature related to heat?
Heat causes a change in the temperature of an object.
Temperature and heat are two different ways to measure the same thing.
What has more thermal energy?
A lake that has ice on the surface
A mug of hot coffee
Which unit of measurement are commonly used to measure heat?
joule
degree Celsius
Which unit of measurement are commonly used to measure temperature?
joule
degree Celsius
Thermal energy is the __________ _________ energy of moving particles
total potential
average potential
average kinetic
total kinetic
Temperature is the __________ _________ energy of moving particles
average potential
average kinetic
total potential
total kinetic
Which choice has the least thermal energy?
bathtub full of warm water
all the water in Earth's oceans
swimming pool full of cool water
cup of hot cocoa
Liang is warming a pot of soup on the stove. How is the motion of the particles in the soup different after the temperature of the soup increases?
They move less freely.
They move faster on average.
They have less average energy.
They vibrate and are close together.
A student is using the tool below to study a sample of matter. What property of matter is the student measuring?
mass
density
temperature
volume
Lin cooked a pot of soup, then put half the soup in the freezer for a while. Now the soup in the pot is hot, and the soup in the freezer is cold. What is the difference between the molecules of the soup in the pot and the molecules of the soup in the freezer?
The molecules of the soup in the pot are moving and the molecules of the soup in the freezer are not moving.
The molecules of the soup in the pot are moving faster than the molecules of the soup in the freezer.
There is no difference because all of the soup is made of the same type of molecules.
The molecules of the soup in the freezer are smaller than the molecules of the soup in the pot.
The thermal energy of an object changes when heat is transferred
True
False
the ability to make things move or change
energy
equilibrium
a balanced state in which a system is stable, such as when two or more samples are at the same temp
molecule
a group of atoms joined together in a particular way
kinetic energy
the energy that an object has because it is moving
thermal energy
the total kinetic energy of all the molecules that make up a sample
Use the information in the diagram to answer the question.
After the gears have been touching for a while, which of the two bottom gears will be cooler, and why?
The smaller bottom gear will be cooler than the larger bottom gear, because less energy has to transfer for the molecules to reach the same temperature as the molecules of the top gear.
The larger bottom gear will be cooler than the smaller bottom gear, because the energy that transferred to it was spread out over more molecules.
The larger bottom gear will be cooler than the smaller bottom gear. It started with more total energy, so less energy had to transfer for both gears in Set B to reach the same total energy.
Both gears will be the same temperature, because both of the top gears had the same amount of energy to transfer and the molecules in the bottom gears start with the same energy.
A chef takes four pans from different parts of her kitchen and puts them in two stacks. The diagram above shows the pans before they touch each other. Use the information in the diagram to answer the question.
After the pans have been touching for a while, which of the two bottom pans will be cooler, and why?
The smaller bottom pan will be cooler than the larger bottom pan, because less energy has to transfer for the molecules to reach the same temperature as the molecules of the top pan.
The larger bottom pan will be cooler than the smaller bottom pan. It started with more total energy, so less energy had to transfer for both pans to reach the same total energy.
The larger bottom pan will be cooler than the smaller bottom pan, because the energy that transferred to it will have spread out over more molecules.
