Weathering happens when rocks break apart and change.
100
What is a natural resource?
A natural resource is a useful thing that comes from nature. Rocks are a natural resource. Wood is a natural resource.
100
What does it mean to reduce?
Reduce means to use less.
200
True or False: There is more water than land on Earth,
True.
200
Do rocks feel rough or smooth?
Some rocks feel rough and some rocks feel smooth.
200
What causes weathering?
Water and ice can cause weathering. (Weathering can take a long time!)
200
Is air a natural resource?
Yes.
200
What does it mean to reuse?
Reuse means to use things again.
300
What is a hill? What is a cliff?
A hill is where the land gets higher. A cliff is land that is very steep.
300
There are three different types of soil. What are they?
Sand, clay, and humus.
300
In what ways can weathering change a rock?
Weathering can change the shape, size, and color of rocks.
300
Why are cars and trucks harmful to the air? How can people help keep the air clean?
Cars and trucks are harmful to the air because they give off harmful materials. People can help keep the air clean by walking or riding bikes instead of driving.
300
What does it mean to recycle?
Recycle means to make old things into new things.
400
What is a plain?
A plain is flat land.
400
What is sand?
Sand is tiny pieces of broken rock.
400
What causes erosion?
Erosion happens when wind or water moves rocks and soil.
400
Why are water and land natural resources? How do people use water and land?
People use water for drinking, bathing, and cooking, etc. People use land to grow food in the soil. People also build things with wood from trees, etc.
400
What kinds of things can you recycle?
Paper, plastic, glass, cans.
500
What is the difference between a lake and a river?
A lake is water that has land all around it. A river is water that flows through the land.
500
What kind of soil is made of parts of living things that died?
Humus.
500
True or False. Tree roots breaking the sidewalk as they grow is an example of erosion.
False. Tree roots breaking the sidewalk as they grow is an example of weathering. Weathering happens when rocks break apart and change.
500
What are gold, silver, and copper examples of?
Minerals. Minerals are nonliving things. Minerals are found in rocks and soil.
500
You found an old shoe box, an old milk jug, and an old soup can. Instead of throwing these items away, how could you use these items?