Living Things Change Environments
What does a bird build for shelter?
A nest.
What is pollution?
Harmful materials in air, land, or water.
What are the 3 Rs?
Reduce, Reuse, Recycle.
What may happen to plants and animals if their environment is harmed?
They may die or move away.
What is a fossil?
The remains or trace of something that lived long ago.
What do worms do to dead leaves?
They break them down.
What happens when people clear land?
Trees and plants are removed.
What does reduce mean?
To use less of something.
What can pollution make unsafe to drink?
Water.
What do scientists study to learn about past living things?
Fossils.
What are some resources living things need to survive?
Food, water, air, sunlight, space, or shelter.
Why can cutting down trees be harmful?
Animals lose homes and soil can wash away.
What does reuse mean?
To use something again.
What happens when living things need the same resources?
They compete.
What does extinct mean?
No members of a species are alive today.
What happens when plants grow larger in an area?
They compete for water, sunlight, and space.
What plant from Japan spread quickly in the United States?
Kudzu.
What does recycle mean?
To turn old things into new things.
What happens when trees block sunlight from smaller plants?
The smaller plants may die.
What does endangered mean?
A species has very few members left.
Name three decomposers mentioned in the lesson.
Bacteria, worms, and fungi.
Why can introducing new organisms be harmful?
They may use up resources that native organisms need.
Besides practicing the 3 Rs, what is another way people can help the environment?
Plant trees.
What new change happens when a big tree falls in a forest?
More sunlight reaches the forest floor, allowing new plants to grow.
What can fossils tell us about?
Living things and environments from long ago.