5th Grade Ch 5.1-5.3

Front

What percentage of the earth's water is in the oceans?

Back

97% of the earth's water is in the oceans.

Front

What is a water molecule made up of?

Back

A water molecule is made up of two hydrogen atoms and one oxygen atom (H2O).

Front

What do all living things need to survive?

Back

All living things need water to survive.

Front

What fraction of the earth's surface is covered by water?

Back

3/4 of the earth's surface is covered by water.

Front

What are tiny, floating plants and animals in the ocean called?

Back

They are called plankton.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O.

Front

Why is water important for living organisms?

Back

Water is essential for life as it is involved in many biological processes, including digestion, respiration, and temperature regulation.

Front

What is the state of water at 0 degrees Celsius?

Back

At 0 degrees Celsius, water freezes and becomes ice.

Front

What is the process called when water changes from liquid to gas?

Back

The process is called evaporation.

Front

What is the main source of water on Earth?

Back

The main source of water on Earth is the oceans.