Questions
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?
What is the energy of the molecules in the ground increases.
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. Use the information in the diagram to answer the question.
After a while, which of the two top containers will be cooler, and why?
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.
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. Use the information in the diagram to answer the question.
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 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.
Daniela put an apple on top of an ice pack in her lunch bag. By lunchtime the temperature of her apple had decreased. What happened to the molecules in the apple when the temperature of the apple decreased?
What is the energy of the molecules in the apple decreased.
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. Use the information in the diagram to answer the question.
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, because the energy that transferred to it was spread out over more molecules.
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. Use the information in the diagram to answer the question.
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.
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?
What is the energy of the water molecules increases.
A worker is getting ready to install solar panels on a roof. She will start by placing the solar panels in two stacks. The diagram above shows the solar panels before they touch each other. Use the information in the diagram to answer the question.
After a while, which of the two top solar panels will be cooler, and why?
The larger top panel will be cooler than the smaller top panel, because the energy that transferred to it was spread out over more molecules.
An artist is using wooden cubes to build a statue. Yesterday, she placed one wooden cube on the statue, and today she is going to put an identical wooden cube on top of it. Both cubes are the same size and have the same number of molecules. The diagram above shows the cubes now, before they are touching. Use the information in the diagram to answer the question.
How does the temperature of the top cube compare with the temperature of the bottom cube now, and what will happen when the cubes have been touching for a while?
Before the cubes touch, the bottom cube is hotter than the top cube. Once the cubes are touching, the bottom cube will transfer kinetic energy to the molecules in the cooler top cube until both cubes reach the same temperature, which will be in between their starting temperatures.
Maja puts a hockey puck onto ice. After a while the temperature of the hockey puck decreases. What happens to the molecules of the hockey puck when the temperature of the puck decreases?
What is the energy of the molecules in the hockey puck decreases.
Aditya is stacking some cups. The diagram above shows the cups before they touch each other. Use the information in the diagram to answer the question.
After the cups have been touching for a while, which of the two bottom cups will be cooler, and why?
The larger bottom cup will be cooler than the smaller bottom cup, because the energy that transferred to it was spread out over more molecules.
A chocolate maker is going to stack two bars of chocolate. The bars of chocolate are the same size and have the same number of molecules. The diagram above shows the chocolate bars now, before they touch each other. Use the information in the diagram to answer the question.
How does the temperature of the top chocolate bar compare with the temperature of the bottom chocolate bar now, and what will happen after the bars have been touching for a while?
Before the bars touch, the top bar is hotter than the bottom bar. Once the bars are touching, the top bar will transfer kinetic energy to the molecules in the cooler bottom bar until both bars reach the same temperature, which will be in between their starting temperatures.