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In photosynthesis, solar energy undergoes a _______________ when it changes from light energy to chemical energy. When the sun warms Earth’s surface, thermal energy is ___________________ to land and water.
The Law of Conservation of Energy applies to these transformations.
The kinetic energy of the food particles increased, causing the food temperature to rise.
moves; changes
conserved
liquid; gas
The metal in the door expands when it becomes warm due to an increase in kinetic energy, and contracts when it's cooler.
transformation; transferred
They show that heat flows from something warmer to something cooler.
Thermal energy either ____________ from one object to another as it is transferred or _______________ into a different form as it is transformed.
The Law of Conservation of Energy applies to these transformations.
The kinetic energy of the food particles increased, causing the food temperature to rise.
moves; changes
conserved
liquid; gas
The metal in the door expands when it becomes warm due to an increase in kinetic energy, and contracts when it's cooler.
transformation; transferred
They show that heat flows from something warmer to something cooler.
When you cook dinner, you heat your dinner on a hot stove. When you place a piece of cool metal in the sun, it is heated by the sun’s energy. Why is heat the correct term to use in these examples?
The Law of Conservation of Energy applies to these transformations.
The kinetic energy of the food particles increased, causing the food temperature to rise.
moves; changes
conserved
liquid; gas
The metal in the door expands when it becomes warm due to an increase in kinetic energy, and contracts when it's cooler.
transformation; transferred
They show that heat flows from something warmer to something cooler.
Two boys place meat and vegetables from the refrigerator onto the hot grill. When the food is cooked and taken off the grill, it is at a much higher temperature than it was before it was cooked. Which statements are true about the food?
The Law of Conservation of Energy applies to these transformations.
The kinetic energy of the food particles increased, causing the food temperature to rise.
moves; changes
conserved
liquid; gas
The metal in the door expands when it becomes warm due to an increase in kinetic energy, and contracts when it's cooler.
transformation; transferred
They show that heat flows from something warmer to something cooler.
Baking cookies in the oven is an example of how energy is (1) ____________.
The Law of Conservation of Energy applies to these transformations.
The kinetic energy of the food particles increased, causing the food temperature to rise.
moves; changes
conserved
liquid; gas
The metal in the door expands when it becomes warm due to an increase in kinetic energy, and contracts when it's cooler.
transformation; transferred
They show that heat flows from something warmer to something cooler.
The contents of the bucket were in a (1) _______________ state. If the contents were heated up enough, they would change to a (2) ________________ state.
The Law of Conservation of Energy applies to these transformations.
The kinetic energy of the food particles increased, causing the food temperature to rise.
moves; changes
conserved
liquid; gas
The metal in the door expands when it becomes warm due to an increase in kinetic energy, and contracts when it's cooler.
transformation; transferred
They show that heat flows from something warmer to something cooler.
You gather logs, twigs, and leaves to build a campfire. As you sit by the fire, the logs burn bright in the darkness, and you feel the heat coming toward you. Which of these statements are true about the amount of energy transformed in the camp fire?
The Law of Conservation of Energy applies to these transformations.
The kinetic energy of the food particles increased, causing the food temperature to rise.
moves; changes
conserved
liquid; gas
The metal in the door expands when it becomes warm due to an increase in kinetic energy, and contracts when it's cooler.
transformation; transferred
They show that heat flows from something warmer to something cooler.
The front door is made of steel. When it is warm outside, the door is difficult to open or close. When it is cool, the door does not stick. Which statement explains why this happens?
The Law of Conservation of Energy applies to these transformations.
The kinetic energy of the food particles increased, causing the food temperature to rise.
moves; changes
conserved
liquid; gas
The metal in the door expands when it becomes warm due to an increase in kinetic energy, and contracts when it's cooler.
transformation; transferred
They show that heat flows from something warmer to something cooler.
Check it!