Rocks
Rock Cycle
Weathering
Erosion
Soil

100

How many types of rocks are there?
three

100

What is the rock cycle definition?
A sequence of processes that change rocks over a period of time. It works slowly and never stops!

100

What is weathering?
The breaking down of rock on Earth’s surface into smaller pieces.

100

What is the definition of erosion?
The process of moving sediment.

100

What is the largest part of soil?
Weathered Rock

200

What are the names of the three types of rocks?
Igneous Metamorphic Sedimentary

200

How does a sedimentary rock turn into a metamorphic rock?
Heat and pressure

200

When rain enters cracks in cement, water freezes into ice and what happens?
It expands, cracking the rock.

200

Wind erosion takes places mostly where?
In a desert

200

What is almost 50% of soil?
Sediments

300

This type of rock forms when melted rock cools and hardens
Igneous

300

How does a metamorphic rock turn into an igneous rock?
melting into magma and cooling into rock

300

In what kind of environment would more weathering occur?
A place that has a lot of precipitation and temperature change.

300

What are the three main causes of erosion?
Water(ice), wind, and glaciers

300

What is humus?
remains of decayed plants and animals

400

This type of rock forms from sediment which is carried by water, wind and ice
Sedimentary

400

How does an igneous rock turn into sediments?
weathering and erosion

400

What physical processes cause weathering?
Water, ice, living things, changes in temperature and wind.

400

How can water cause erosion?
It can carry sediment and leave it on a shore or coastline.

400

What three things do the roots draw up through soil?
Nutrients, water, and oxygen

500

This type of rock has changed from another type of rock due to high temperature and pressure.
Metamorphic

500

How do sediments turn into a sedimentary rock?
Compaction and cementation

500

What do large ocean waves do to coastlines?
They can weather coastlines. Waves smash onto a cliff, causing rocks to fall into the sea.

500

What does wind erosion create in deserts?
Sand Dunes

500

What kind of fertilizer is better for the Earth and soil?
Natural Fertilizer