Name a common gas.

Tiny living things that are everywhere around us. We can only see them with a very powerful microscope. They come in different shapes such as rods, spirals, and spheres. Bacteria are important in an ecosystem to break down dead and decaying

A living thing that is no longer found alive anywhere on Earth today.

Tiny droplets of condensed water vapor floating high above the ground.

Name a renewable resource.

When a liquid turns into a gas.

What happens when two or more substances are combined?

The action of the earth turning or spinning around its center. If you stand in one place and turn all the way around, you have rotated. The earth rotates (spins) once every 24 hours.

Water in gas form.

The cycle of the water evaporating and condensing on earth. It has been happening for millions of years.

Living things that break down dead and decaying organisms. The most common decomposers are bacteria and fungi.

Name a common liquid.

Name a common solid.