grade 6 , con 5 , lesson 1 & 2

The average temperature is almost.......... the final temperature of the mixture of two substances with different temperatures at the thermal equilibrium.

• more than

• less than

• equal to

• double

If you pour a cup of water with temperature 30°C to another cup of water with temperature 80°C, the average temperature of the mixture may be........

• 80°C

• 30°C

• 55°C

• 110°C

The final temperature of two mixed substances with different temperatures is less than that of the .......substance and greater than that of the .......substance

• hotter cooler

• cooler-hotter

• bigger - smaller

• smaller - bigger

After mixing two substances with different temperatures, the molecules of the cooler substance will........

• move faster.

• not be affected.

• move slower.

• stop moving.

Any matter has thermal energy, because......

• its molecules always move.

• it has fixed shape.

• its molecules don't move

• it has fixed volume.

If heat transfers to a lower temperature object, its molecules will.........

• stop moving.

• move slower.

• move faster.

• not be affected.

Heat transfers from .......object to ........object.

• cooler-hotter

• hotter-cooler

• bigger smaller

• smaller bigger

The handle of an electric iron is made of.........

• iron.

• thermal insulator material.

• metal.

• thermal conductor material.

All the following are properties of heat, except........

• it is an essential component of life on Earth.

• it cannot be lost but it is only transferred.

• it flows from a cooler object to a hotter object.

• it flows from a hotter object to a cooler object.

If you stand on hot sand in barefeet, you will feel the hotness of the sand because..............

• heat transfers from your legs to sand.

• heat transfers from sand to your legs.

• your legs are hotter than sand.

• your legs and sand have the same temperature.