Science 5: Heat

Energy from the sun reaches earth by _____

• friction

• convection

• reflection

• radiation

A heater in a fish tank is an example of _____.

• conduction

• convection

• radiation

• frequency

Convection take places in ______.

• solid and liquid

• liquid and gases

• solid and gases

• solid, liquid and gases

The particles of water moves faster:

I. means it has high energy and produces colder temperature.

II. means it has high energy and produces hotter temperature.

III. means it has low energy and produces hotter temperature.

IV. means it has low energy and produces colder temperature.

• I

• II

• III

• IV.

What happens when you pour a cold water in a basin with hot water?

• The hot water will become cold water.

• The hot water will become hotter.

• The hot water will become lukewarm.

• The hot water remain its temperature.

Which of the following does not show transfer of heat energy?

I. Ice cubes poured in a hot chocolate drink.

II. A spoon placed in a cup of hot coffee.

III. Ice cream tub placed in a freezer.

IV. A boy getting unusual darkening of his skin after overexposure in the sun.

• I

• II

• III

• IV

A kid pour a 100^oC water in a glass with 100^oC water. What inference can you make?

• Pouring 100^oC water in a glass with 100^oC will make the water very hot.

• There will be no transfer of energy upon pouring the 100^oC water in a glass with 100^oC water.

• There will a transfer of energy upon pouring the 100^oC water in a glass with 100^oC water.

• Pouring 100^oC water in a glass with 100^oC will make the water warm.

Temperature determine how fast or slow particles are moving.

• Fact

• Bluff

Which of the following is a source of heat?

I. Sun and Fire

II. Body

III. Geothermal energy

IV. Electrical appliances

• I and IV

• II and III

• I and III

• I, II, III, and IV

How is heat is transferred in the picture shown?

I. Convection

II. Conduction

III. Radiation

• I

• I and II

• I and III

• II and III