Types of Heat Transfer
What type of heat transfer occurs through direct contact between objects?
Conduction
How are particles arranged in a solid?
Tightly packed and fixed in place
What does temperature measure?
How hot or cold something is (average kinetic energy)
What is an insulator?
A material that slows down heat transfer
What is the main source of heat energy for Earth?
The Sun
What type of heat transfer occurs through movement of fluids like air or water?
Convection
What happens to particles when temperature increases?
They move faster.
What is heat?
Heat is the transfer of thermal energy between systems or objects with different temperatures.
Give one example of a good insulator.
Air, wool, foam, plastic
What type of heat transfer warms the Earth from the Sun?
Radiation
What type of heat transfer does not require matter and can travel through space?
Radiation
Which state of matter has particles that are far apart and move freely?
Gas
In which direction does heat always flow?
From warmer to cooler objects
Why are houses insulated in colder climates?
To reduce heat loss
Why do coastal areas have milder temperatures than inland areas?
Water heats and cools more slowly than land.
Why does a metal spoon heat up faster than a wooden spoon in hot soup?
Metal is a better conductor of heat.
Why do substances expand when heated?
Particles move faster and spread out.
Why can a large object have more heat than a small hot object?
It has more particles (more total energy).
Why do winter jackets trap heat effectively?
They trap air, which is a poor conductor.
How do convection currents affect weather?
They move warm and cool air, creating wind and weather patterns.
Why does warm air rise and cool air sink?
Warm air is less dense and cool air is more dense.
How does particle movement differ between solids and liquids?
Solids vibrate in place; liquids move past each other.
What happens to particle motion when heat is removed?
Particles slow down
Why is double-glazed glass effective for insulation?
It traps air between layers, reducing heat transfer.
Why do dark surfaces heat up faster than light surfaces?
They absorb more radiation.