guru lokhith class 7 water

Water has the chemical formula __________.

• H2O

• O2

• CO2

• O3

Water exists in three states: solid, liquid, and __________.

• GAS

• LIQUID

• WATER

• AIR

The process by which water changes from liquid to gas is called __________.

• ASSIMILATION

• EVAPORATION

• CONDENSATION

• COOLING

__________ is the main source of water on Earth.

• RIVER

• LAKE

• OCEAN

• RAIN

The percentage of Earth's surface covered by water is about __________%.

• 34%

• 99%

• 71%

• 64%

Oceans contain freshwater

• TRUE

• FALSE

Water is a universal solvent

• TRUE

• FALSE

Plants lose water through a process called transpiration.

• TRUE

• FALSE

Boiling water at high altitudes takes longer than at sea level.

• TRUE

• FALSE

Frozen water is denser than liquid water.

• TRUE

• FALSE