🔥 Heat – Transfer of Heat Flash Cards
1️⃣ What is Heat Transfer?
The process by which heat energy moves from a hotter body to a colder body.
2️⃣ What are the three modes of heat transfer?
Conduction, Convection, and Radiation.
3️⃣ Define Conduction.
Transfer of heat through solids without movement of particles.
4️⃣ Define Convection.
Transfer of heat by actual movement of particles in liquids or gases.
5️⃣ Define Radiation.
Transfer of heat without any medium, directly through space.
6️⃣ What are Conductors?
Substances that allow heat to pass through easily. e.g. metals.
7️⃣ What are Insulators?
Substances that do not allow heat to pass easily. e.g. wood, plastic.
8️⃣ State one application of conduction.
Metal pan handles are made of wood or plastic to prevent burns.
9️⃣ What causes Land Breeze?
At night, land cools faster; cool air from land moves towards the sea.
🔟 What causes Sea Breeze?
During the day, land heats faster; cool air from sea moves towards land.
1️⃣1️⃣ Why do black objects get hotter?
They absorb more heat and radiate it quickly than shiny objects.
1️⃣2️⃣ Why do shiny objects remain cool?
They reflect most of the heat falling on them.
1️⃣3️⃣ What is a Thermos Flask?
A container designed to reduce heat loss by conduction, convection, and radiation.
1️⃣4️⃣ How does a Thermos Flask prevent conduction?
It uses insulating materials like cork and plastic supports.
1️⃣5️⃣ How does it prevent radiation?
By having silvered inner surfaces that reflect heat back.
