Energy Transfers
What type of energy is transferred when you touch a hot stove?
What is thermal (heat) energy?
Which type of energy is stored in a stretched rubber band?
What is (elastic) potential energy?
This transfers heat by movement of fluids or gases
What is convection?
What does the law of conservation of energy state?
What is energy cannot be created or destroyed, only transformed?
When a person stands in front of a fan, how is energy being transferred?
Energy is transferred through convection and mechanical energy
Reason: as the fan moves air (mechanical energy), and the moving air helps to cool the person by transferring heat away through convection.
When a ball is dropped from a height, what type of energy transfer occurs as it falls?
What is potential energy to kinetic energy?
The energy of a moving car is an example of what type of energy?
What is kinetic energy?
Partial: Mechanical
If you heat a metal spoon in hot water, what is the energy transfer happening?
What is thermal energy transfer by conduction, as heat from the hot water is transferred to the metal spoon through direct contact, causing the spoon to heat up.
Partial: conduction. Question is asking for type of energy transfer.
When a roller coaster goes up a hill, where is the potential energy at its highest?
What is at the top of the hill?
Which type of energy is transferred when an electric stove is used to cook food?
What is electrical energy to thermal energy?
Reason: the electric stove uses electrical energy to generate heat (thermal energy) that cooks the food.
If you push a cart and it starts moving, what type of energy is transferred to the cart?
What is kinetic (mechanical) energy?
What type of energy is involved when a rock is heated by the sun?
What is (radiation) thermal energy?
What happens to the thermal energy when a cold object touches a warm object?
What is thermal energy transfers from the warmer object to the cooler object?
If a car moves down a hill, what happens to its potential energy?
What is it decreases and converted into kinetic energy?
Partial: Mechanical. As the question is asking for specifics
Why does an ice cube melt faster in a warm room compared to a cold one?
What is because thermal energy transfers from the warm air to the cold ice cube?
Reason: the temperature difference between the ice cube and the room causes heat to transfer from the warmer surroundings to the colder ice, causing it to melt faster.
When a candle burns, the energy from the flame transfers in the form of light and heat. Which form of energy does the candle transform into?
What is chemical energy to light and thermal energy?
Partial: Thermal energy. Question is asking for type of transformation.
When you hear music coming from a speaker, which type of energy are you detecting?
What is sound energy?
If a hot potato is placed in a bowl of cooler soup, what is the direction of thermal energy flow?
What is from the potato to the soup?
Reason: heat flows naturally from the hotter object (the potato) to the cooler one (the soup) until both reach thermal equilibrium.
If energy is lost as heat in a system, where did it go?
What is transferred to its surrounding?
Reason: as heat energy that is lost from a system usually flows to the surrounding environment, following the law of conservation of energy.
In a swimming pool, which energy transfer is responsible for heating the water when exposed to the sun?
Radiation from the sun to the water
Reason: the sun emits electromagnetic radiation, which is absorbed by the water, causing it to heat up.
When a microwave oven heats food, what type of energy is being transferred?
What is electromagnetic energy (microwave/radiant) to thermal energy?
Partial: Thermal energy. Question is asking for transfer itself.
What energy transformation occurs in a battery-powered flashlight when it is turned on?
What is chemical energy to electrical energy?
Reason: Battery has stored chemical energy. Next it is converted into electrical energy, which then powers the light bulb, producing light energy.
Explain how thermal energy is transferred when sunlight warms the air.
Thermal energy is transferred through radiation from the sun to the Earth's surface, and then to the air.
Partial: radiation
Zero: convection, as is not the main source
Explain why a light bulb produces heat even though its primary function is to emit light.
What is because not all the electrical energy is converted into light; some is lost as heat.
Reason: some of the electrical energy is converted to heat instead of light.
How do solar panels turn sunlight into energy?
Solar panels change sunlight into electricity using special cells, as solar panels use photovoltaic cells to capture sunlight and convert it into electricity.