How do we use air?
What is soil?
How do people use rocks and minerals?
What covers Earth?
Other questions.
100
Air is a natural resource. True or False?
True
100
It is the loose top layer of Earth.
What is soil?
100
What is a mineral?
It is a nonliving thing found in nature.
100
What is a natural resource?
Something from Earth that people use such as air, land and water.
100
Why is it important to keep air clean?
Clean air helps plants grow and stay green. It helps animals and people have healthy lungs. Clean air helps keep buildings and statutes clean.
200
What three things need air to stay alive?
People, plants, and animals
200
What is soil made of?
Bits of minerals and rock, rotting plants, and rotting animals
200
Different rocks have different minerals in them. True or false?
True. That is why they are different colors.
200
Ocean water is not salty. True or false?
False. Ocean water is salty, fresh water is not salty.
200
What is the color of garnet?
Red
300
This happens when harmful things get into the air.
What is air pollution?
300
What is humus?
bits of rotting plants and animals
300
These are very large rocks. What are they called?
What is a boulder?
300
How is lake water different from ocean water?
Lake water is fresh water ad ocean water is salty.
300
Limestone, sandstone, and granite are hard rocks. True or false?
True.
400
What causes air pollution?
Dust and smoke from cars, fires, factories, and cigarettes are several examples.
400
How do animals help soil?
They help by digging in it and breaking it into small pieces. This keeps air in the soil. It makes space for water to get into the soil, too.
400
Talc, graphite, and gold: Hard or soft minerals?
Soft minerals. People use them for powder, pencils, and medals.
400
Earth's land and air are natural resources. People use soil for what?
To grow plants. They use trees to make paper, furniture, and buildings. People use air to breathe.
400
You learned three kinds of soil: topsoil, clay soil, and sandy soil. Which one of the three soil is best for growing plants?
Topsoil. The color is black or brown and it is the best soil to grow plants.
500
If you find bits of dirt on a windowsill, what do you know about the air?
The air is dirty, has dust, and is harmful to our lungs. It makes our lungs unhealthy and can make us sick.
500
What causes soil to go away?
Water and wind can take soil away. One way to save soil is to grow plants. The plant roots help hold soil in place.
500
What do people use hard rocks for?
Buildings, statutes, and bridges.
500
How are water and land resources different?
People use water to swim and play. They wash, clean, and drink water. With land, people use soil to grow plants. Trees make paper, furniture, and buildings. People use rocks to make statues and buildings. They melt sand to make glass.
500
What are four things that are made from plants? There are many answers..
Cotton to make clothes, seeds of plants like oats and rice, tables from trees, and carrots/potatoes from the roots of plants.
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