Sedimentary Rocks
Name and explain the first step in the formation of sedimentary rocks.
1. Weathering: rock breaks down into sediment
Igneous rocks can form from __________ or __________.
lava magma
How are metamorphic rocks formed?
extreme heat and pressure
What is physical weathering?
R
What rock makes up Earth's crust, and how much of Earth's crust is it?
igneous rock and about 95%
Name and explain the second step in the formation of sedimentary rock.
2. Erosion: sediment moves to a new location
How will an igneous rock that cools very quickly look?
marble
gneiss
serpentine
What is chemical weathering? Give an example.
What type of rock makes up most of Earth's surface, and about how much of Earth's surface does it make up?
sedimentary and about 75%
Name and explain the third step in the formation of sedimentary rock.
3. Deposition: rock settles or drops off to the new location
What are intrusive igneous rocks?
Rocks that are formed under the earth's crust
What kinds of rocks can turn into metamorphic rocks?
igneous and sedimentary
List three types of erosion.
wind
waves
gravity
What type of rock are you likely to find a lot of fossils in?
limestone
Name and explain the fourth step in the formation of sedimentary rock.
4. Compaction: layers of sediment get pressed together by the weight of the top layers
Rocks that are formed above the earth's surface
What type of weathering is this? Acid rain dissolving rock that can cause erosion.
chemical
List three examples of weathering.
wind, rain, sleet, snow, ice melting, thawing
When a cave collapses, a ____________ is formed.
canyon
Name and explain the final step in the formation of sedimentary rock.
How can an igneous rock turn into a sedimentary rock?
it can be weathered and the sediment can go through the five steps to become a sedimentary rock
Rock is exposed to ice.
physical weathering
Where can igneous rocks form?
on Earth's surface or within the crust
Explain two things that would happen to the rocks in a river that gets eroded over time?
the river banks might become eroded, causing the river to become wider
sedimentary rock can form on the bottom of it over time
sediments can might move and create sedimentary rock in a new location (lake, ocean, etc.)