Heat Transfer Basics (Lesson 4)
What is heat?
👉 The transfer of thermal energy
Which type of heat transfer does NOT need matter?
👉 Radiation
What is an energy resource?
👉 A source of energy used by humans
Which type of energy can be replaced naturally?
👉 Renewable energy
What happens to objects in direct sunlight in space?
👉 They become very hot
In which direction does heat always move?
👉 From warmer objects to cooler objects
Which type of heat transfer involves particles bumping into each other?
👉 Conduction
What is a fuel?
👉 A material that is burned to produce energy
Which type of energy will run out?
👉 Nonrenewable energy
What happens to objects not in sunlight in space?
👉 They become very cold
What happens when two objects reach the same temperature?
👉 Heat transfer stops
Which type of heat transfer happens in liquids and gases?
👉 Convection
What are fossil fuels made from?
👉 Remains of ancient plants and animals
Give one example of renewable energy
👉 Solar, wind, or water
What type of heat transfer mostly occurs in space?
👉 Radiation
What type of heat transfer happens in solids?
👉 Conduction
What is a convection current?
👉 Movement of warm rising and cool sinking particles
Name one fossil fuel
👉 Coal, oil, or natural gas
Why should we conserve energy?
👉 To protect Earth
Why is heat control important in space?
👉 To keep astronauts and equipment safe
Why are metals good conductors?
👉 They transfer heat quickly
Give an example of radiation
👉 Heat from the sun or a fire
Why are fossil fuels harmful?
👉 They cause pollution
What is one way to save energy?
👉 Turn off lights, reduce waste, use less water
Give one example of heat control on Earth
👉 Fans, refrigerators, car cooling systems