HEAT FORM 2

What is meant by temperature?

• A form of energy

• Degree of hotness

• Quantity of matter

• Ability to do work

Which situation involves radiation of heat?

• Boiling water in a kettle

• Melting metal in a furnace

• Warming up in front of a fireplace

• Forming dew drops on a leaf

Diagram above shows 4 containers of the same size but made of different materials and filled with hot water.The volume and temperature are the same.

Arrange the containers in ascending order based on the amount of heat loss.

• P,Q,R.S

• P,R,Q,S

• S,Q,R,P

• S,P,R,Q

Which surface is the best heat absorber?

• Grey surface

• Red surface

• White surface

• Black surface

Which of the following uses the principle of expansion of matter?

• Air conditioner

• Mercury in thermometer

• The handle of a pan is made of plastic

• Wall of houses are painted white

A stainless steel chair feels colder to the touch than a wooden chair. Which statement describes the situation?

• Stainless steel is harder than wood.

• Stainless steel reflects heat better than wood.

• Stainless steel conducts heat better than wood.

• Stainless steel radiates heat better than wood.

Diagram above shows air holes J,K,L,M,N,O,P and Q in a building.

Which of the following shows the correct flow of hot air and cold air through air holes?

• Hot air : K,L,P,O

  Cold air : J,MQ,N

• Hot air : J,M,Q,N

  Cold air : K,L,P,O

• Hot air : N,O,P,Q

  Cold air : J,K,L,M

• Hot air : J,K,L,M

  Cold air : N,O,P,Q

Diagram shows an apparatus set-up to study the rate of heat flow. Thumbtack K,L,M and N are made of copper.

Which thumbtack will fall first?

• K

• L

• M

• N

How does heat move?

• From insulators to conductors

• In all direction at once

• From hotter to colder region

• From colder to hotter region

When two objects that are in contact can exchange heat energy and have achieved the same temperature, the objects said to be in ______________________