grade 6 , con 4 , lesson 2

When you touch a piece of ice, heat transfers from your........... to the.....

• ice-hand

• ice - the body

• hand-ice

• ice - air

Heat transfers from

• a cold object to an object that has the same temperature

• a hot object to an object that has the same temperature

• a cold object to a hot object

• a hot object to a cold object

Temperature is a measure of the energy of molecules of a substance.

• kinetic

• potential

• light

• chemical

When the molecules of a substance gain thermal energy, their total kinetic energy............ and the temperature of the substance....

• decreases - decreases

• increases - increases

• decreases - increases

• increases - decreases

Melting process is the change of substance from.............tate to..............state.

• solid-liquid

• liquid-gas

• gas - liquid

• liquid - solid

Evaporation process is the change of substance from...........state to........... state

• solid-liquid

• liquid-gas

• gas - liquid

• liquid - solid

The transformation of gas into liquid is called.............and the reverse process is called....

• melting - evaporation

• evaporation - melting

• evaporation - condensation

• condensation - evaporation

Heat flows from a hotter substance to a colder substance

• True

• False

Molecules of solids move faster than molecules of liquids

• True

• False

By increasing the thermal energy of the molecules of matter the force is that hold this molecules increases

• True

• False