physical science

Solids have definite volume and definite shape.

• TRUE

• FALSE

Liquid have definite volume and definite shape.

• false

• true

Gases do not have a definite volume but no shape. 

• true

• false

. Explain what happens when a substance gains or loses energy.

• that it looses energy.

• it gains energy.

• When a substance gains energy its particles move faster and its temperature rises. When a substance is cooled, it loses thermal energy, which causes its particles to move more slowly and its temperature to decrease.  

• When a particle gains energy its particles move faster and its temperature rises. When a substance is cooled, it loses thermal energy, which causes its particles to move more slowly and its temperature to decrease.  

Explain why a substance has the same freezing and melting point.

• because they are the same.

• they have the same mass

• they have the same density.

• they do not have an explanation

Evaporation: The process in which water turns into gas. 

Boiling: When energy is transferred evenly to the whole substance. 

Condensation: When the substance changes from gas to liquid.

• false

• true

Deposition: This is the process in which solid turns into gas

             Sublimation: The process in which a gas turns into solid.

• false

• true

an example of nuclear energy is..

• battery

• pun de cata

• guitar

• energy from the sun.

an example of chemical energy is

• battery

• fio

• guitar

• jiraff

an example of sound energy is

• guitar

• smell

• battery

• sun