Unit 2- Earth’s Surface Study Guide
What Are Rocks?
Tentative Test Date:
Rock- a hard, nonliving object from the ground
Tip- Rock and road begin with the same sound.
A road may be made from bits of rock.
Weathering- what happens when wind and water break down rock
into smaller pieces
Tip-Wind and rain are kinds of weather. Weather changes rock.
Weathering is when weather changes rock.
*Read these important ideas. Do your best to remember them.
1.
Rocks are hard, nonliving things from the ground.
2.
Rocks are different sizes, shapes, and colors.
3.
Weathering changes rock.
4.
Weathering takes place when wind and rain hit rock.
5.
Wind and rain break down rock into smaller pieces.
6.
Rocks are made up of minerals.
7.
Rocks form in different ways.
8.
People use rocks to build things and to make art.
What Is Soil?
Soil-small pieces of rock and once-living things
Another word for soil is dirt.
Tip- Soil may make clothes look dirty.
Sand- tiny pieces of rock
Tip - Sand and sea begin with the same sound.
You often find sand where the sea meets land.
Humus- material in soil made of once-living things
Tip-Humus and human sound almost the same.
Humans are living things. Humus is made of once-living things.
Clay- material in soil. Wet clay is sticky. Dry clay is smooth.
Tip-Clay and stay end with the same sound.
Wet clay will stay on your hands because it is sticky.
*Read these important ideas. Do your best to remember them.
1.
Soil is bits of rock and once-living things.
2.
Once-living things are called humus.
3.
Humus is dark and holds water well.
4.
Soil with a lot of humus is good for growing plants.
5.
Soil with a lot of sand does not hold water well.
6.
Sandy soil is not good for growing most plants.
7.
Soil with a lot of clay holds water well.
8.
Many plants do not grow well in clay.