Grade 3
What is soil?
Soil is the upper layer of
the earth’s surface and is
a mix of organic material,
broken rock and minerals
Name 3 reasons soil is important.
Answers may vary
What is air?
Air surrounds the earth and is made up of invisible gases.
What is water?
Water is a clear, colourless, odourless, and tasteless liquid.
What is a built source of water?
Man made source of water. EX: well
What is soil made of?
Soil is made up of
non-living things, like rock,
minerals, air, and water,
and organic material, like
dead (decaying) plants.
What is bedrock? Why are animals not found here?
Solid rock. No space
What are the gases called that make up air?
The gases that make up air are called
nitrogen and oxygen.
Why is water important for people?
Water helps the human body work properly and
stay healthy. Water also increases our energy.
What are pesticides?
Used to kill pests
What are the five soil horizons in order (top to bottom)?
humus, topsoil, subsoil, parent material, bedrock
What are the three soil parciles?
Sand, silt, clay
Why do humans need air?
Air gives oxygen to humans. Oxygen gives us energy to move and run around. Humans breathe in air through the nose and mouth. Our lungs bring fresh air into our bodies and push out stale air.
Why is water important for animals?
Water is a place to live for many living things, like fish and plants. Many animals need to drink water to survive.
How can we protect our water? How can we protect our air?
-Don't throw trash in water
- Walk or bike when possible
What is organic material?
Decaying plant and animal remains.
What is the biggest soil partcile?
Sand
Why do plants need air?
Plants breathe through their leaves. The plants and trees help to clean our air.
In the water cycle, water forms clouds as...
condensation
What are three things harmful to soil?
Salt, pesticides, erosion
What would you find in subsoil?
Clay, iron, and organic matter.
What is the smallest soil particle?
Clay
What is wind?
Wind is a source of energy. The wind is very powerful. Wind energy is created when wind blows on wind turbines.
In the water cycle, water goes up from ponds and bodies of water as...
evaporation
Evaporation is when water...
turns from a liquid to a gas