Lesson 09 – Wonderful Worms!

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Read About Worms


Read the vocabulary terms to understand the reading better.

Fertilizer is a chemical or natural substance added to soil or land to help it grow.

Nutrients are the things that plants or animals need to grow and to stay healthy.

Soil is a mixture of minerals and organisms that cover most of the earth’s surface and is where plants grow.

Castings are a natural manure produced by worms.

Wonderful Worms!

The next time you see a worm, say “Thank you!” Why? Worms help soil and plants in many ways.

Worm Castings

Worm waste is called castings. What is so great about worm castings? They are great fertilizer for plants.

Worms eat soil because it contains pieces of things that were living. (There are a lot of nutrients in dead things.) The castings that worms leave behind are full of nutrients. The nutrients in castings mix easily with water. Plant roots can take in the nutrients that are mixed in that water.

Worms sometimes come out of the ground. They can bite grass and drag it underground to eat. Worms help put more living things into the soil.

Worm Tunnels

Worms make tunnels as they move through soil. The tunnels fill with air.

Worm tunnels bring more air to different parts of the soil. Plant roots need air, so worm tunnels are good for plants.

Worm tunnels can also help water drain through soil. Water can run quickly through worm tunnels. The tunnels help to bring water deep into the soil. This is especially helpful to plants growing in soil that drains slowly.

Now you know why gardeners are happy to find worms in garden soil. The worms make the soil better for growing plants.

To learn more about worms, watch the video by SciShow Kids on Youtube.

Now Show What You Know!

Complete some questions about the reading selection by clicking “Begin Questions” below.