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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?
Heat was transferred by conduction, resulting in an increase in kinetic energy.
The metal in the door expands when it becomes warm due to an increase in kinetic energy, and contracts when it's cooler.
chemical → electrical → light
Floor particles increase in warm weather increasing the kinetic energy making it expand. Trimming it gave it room to expand.
moves; changes
conserved
The kinetic energy of the food particles increased, causing the food temperature to rise.
The Law of Conservation of Energy applies to these transformations.
Baking cookies in the oven is an example of how energy is (1) ____________.
Heat was transferred by conduction, resulting in an increase in kinetic energy.
The metal in the door expands when it becomes warm due to an increase in kinetic energy, and contracts when it's cooler.
chemical → electrical → light
Floor particles increase in warm weather increasing the kinetic energy making it expand. Trimming it gave it room to expand.
moves; changes
conserved
The kinetic energy of the food particles increased, causing the food temperature to rise.
The Law of Conservation of Energy applies to these transformations.
Thermal energy either ____________ from one object to another as it is transferred or _______________ into a different form as it is transformed.
Heat was transferred by conduction, resulting in an increase in kinetic energy.
The metal in the door expands when it becomes warm due to an increase in kinetic energy, and contracts when it's cooler.
chemical → electrical → light
Floor particles increase in warm weather increasing the kinetic energy making it expand. Trimming it gave it room to expand.
moves; changes
conserved
The kinetic energy of the food particles increased, causing the food temperature to rise.
The Law of Conservation of Energy applies to these transformations.
A student likes to attend football games, no matter how cold the weather becomes. She activates a hand warmer and tucks it into the glove she is wearing. She holds her hands together to warm them. Which best describes how her hands were warmed?
Heat was transferred by conduction, resulting in an increase in kinetic energy.
The metal in the door expands when it becomes warm due to an increase in kinetic energy, and contracts when it's cooler.
chemical → electrical → light
Floor particles increase in warm weather increasing the kinetic energy making it expand. Trimming it gave it room to expand.
moves; changes
conserved
The kinetic energy of the food particles increased, causing the food temperature to rise.
The Law of Conservation of Energy applies to these transformations.
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?
Heat was transferred by conduction, resulting in an increase in kinetic energy.
The metal in the door expands when it becomes warm due to an increase in kinetic energy, and contracts when it's cooler.
chemical → electrical → light
Floor particles increase in warm weather increasing the kinetic energy making it expand. Trimming it gave it room to expand.
moves; changes
conserved
The kinetic energy of the food particles increased, causing the food temperature to rise.
The Law of Conservation of Energy applies to these transformations.
A home had a wooden floor put down in cool weather. As the weather warmed, the floor started to buckle. The floor was fixed by trimming the edges so there was space between the flooring and the wall. Why did this help to make the floor flat again?
Heat was transferred by conduction, resulting in an increase in kinetic energy.
The metal in the door expands when it becomes warm due to an increase in kinetic energy, and contracts when it's cooler.
chemical → electrical → light
Floor particles increase in warm weather increasing the kinetic energy making it expand. Trimming it gave it room to expand.
moves; changes
conserved
The kinetic energy of the food particles increased, causing the food temperature to rise.
The Law of Conservation of Energy applies to these transformations.
A student gets ready to go to school one day, and he finds out that his car's battery is dead. The headlights will not come on, and the car won’t start. What transformations usually happen when the battery is active and the headlights come on?
Heat was transferred by conduction, resulting in an increase in kinetic energy.
The metal in the door expands when it becomes warm due to an increase in kinetic energy, and contracts when it's cooler.
chemical → electrical → light
Floor particles increase in warm weather increasing the kinetic energy making it expand. Trimming it gave it room to expand.
moves; changes
conserved
The kinetic energy of the food particles increased, causing the food temperature to rise.
The Law of Conservation of Energy applies to these transformations.
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?
Heat was transferred by conduction, resulting in an increase in kinetic energy.
The metal in the door expands when it becomes warm due to an increase in kinetic energy, and contracts when it's cooler.
chemical → electrical → light
Floor particles increase in warm weather increasing the kinetic energy making it expand. Trimming it gave it room to expand.
moves; changes
conserved
The kinetic energy of the food particles increased, causing the food temperature to rise.
The Law of Conservation of Energy applies to these transformations.
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