CL.3 BK.3-2-Properties of Heat

What happens to heat when an object is heated?

• Heat energy decreases the motion of particles in the object.

• Heat energy has no effect on the particles in the object.

• Heat energy increases the motion of particles in the object.

• Heat energy causes particles to move slower in the object.

Which materials transfer heat quickly?

• Wood and plastic

• Metals such as copper and aluminum.

• Glass and ceramics

• Rubber and fabric

What are metals considered in terms of heat transfer?

• Metals are considered good conductors of heat.

• Metals are poor conductors of heat.

• Metals do not conduct heat well.

• Metals are insulators of heat.

How do non-metals transfer heat?

• Non-metals do not transfer heat at all.

• Non-metals transfer heat through convection.

• Non-metals transfer heat through conduction.

• Non-metals transfer heat through radiation.

Why do we use poor conductors of heat for holding hot objects?

• They are aesthetically pleasing and enhance the look of the object.

• We use poor conductors of heat to prevent burns and ensure a safer grip when holding hot objects.

• They are lightweight, making them easier to carry.

• They conduct heat well, making it easier to hold hot objects.

What happens to materials when they are heated?

• Materials contract and become denser when heated.

• Heating materials has no effect on their properties.

• Materials dissolve completely when heated.

• Materials expand and may change state or properties when heated.

What do materials do when they are cooled?

• Materials expand when they are cooled.

• Materials remain the same size when they are cooled.

• Materials contract when they are cooled.

• Materials become lighter when they are cooled.

How does the liquid in a thermometer respond to temperature changes?

• The liquid remains the same regardless of temperature changes.

• The liquid freezes when heated and melts when cooled.

• The liquid expands with heat and contracts with cold.

• The liquid evaporates at high temperatures and condenses at low temperatures.

What is the main purpose of a thermometer?

• To measure temperature.

• To measure pressure.

• To measure humidity.

• To measure speed.

Can air conduct heat?

• Heat cannot travel through air.

• Yes, air can conduct heat.

• No, air cannot conduct heat.

• Air is an insulator and does not conduct heat.