Rocks
Minerals
Soil
Changes
100
What are all rocks made of?
All rocks are made of minerals.
100
How do scientists find out how hard a mineral is?
They find hardness by rubbing one mineral against another. The harder mineral will SCRATCH the softer one.
100
What is soil?
A material that covers most of Earth's land.
100
What is weathering?
Weathering is the wearing away of rocks and soil.
200
How are rocks and minerals different?
Rocks are MADE of minerals. Minerals are not made of rocks.
200
What is texture?
Texture is the feel of a rock or mineral.
200
What is humus?
Humus is small bits of plant and animal matter found in soil.
200
What is erosion?
Erosion is when rock or soil is moved from one place to another.
300
Are rocks and minerals shaped the same? Explain.
No! Minerals are shaped like crystals, but rocks are not!
300
What would make a rock's texture rough?
The larger the minerals in the rock, the rougher the rock will feel.
300
Why is humus good for plants?
Humus is good for plants because it provides food or nutrients for plants.
300
What do you think happens to small pieces of rock after rivers carry them away?
The small rocks are deposited or dropped where the river flows into the ocean.
400
What would you see if you closely examined a rock with a microscope?
You would see crystals of minerals.
400
List the four properties used to classify rocks.
The four ways to classify rocks are by hardness, texture, luster, and color.
400
Why is loam the best soil for plants to grow in?
It is made of sand, silt, clay, and other materials that are good for plant growth.
400
What elements of nature can cause weathering?
Water and wind can cause weathering.
500
Why are rocks so different from one another?
The minerals in them have different properties.
500
If quartz scratches copper, then what does that mean about their hardness.
That means that quartz is harder that copper.
500
What is the smallest particle of soil called?
Clay
M
e
n
u