Layers of the Earth
What is the top layer of earth?
What is crust
How many types of rocks are there?
What is three
True or False: Bedrock is full of nutrients
False
True or False: The topsoil has very little nutrients
False
Which layer of earth is the thinnest?
What are common types of rocks in Vermont?
Slate, marble, granite, and more
Granite is what type of rock?
Igneous
What are two facts about the bedrock layer?
- Made up of big rocks
- No nutrients
True or False: The mantle is made of magma
True
How is igneous rock formed?
When magma cools and hardens
What are two facts about the subsoil layer?
-Only large plant roots reach subsoil
-Tight and compacted
Why is the parent rock layer called "parent rock"?
Because all upper upper layers are developed from the parent rock
What is the hottest layer of the earth?
What is the inner core
How is metamorphic rock formed?
When sedimentary and igneous rock are put under heat and pressure
What is the texture of the subsoil like?
Rocky, but with dirt and mud
What are two facts about the topsoil layer?
-Farmers mix topsoil and subsoil together
-Lots of living organisms
-Compost makes it darker
-Lots of nutrients
Why is the inner core solid?
Because there is high pressure and the temperature is high
What are the two ways sedimentary rock is formed?
1. When sediments fall and then are compacted at high pressure
2. When igneous rock erodes, breaks up, and is then compacted
How does the subsoil receive nutrients
Rain pushes nutrients down from the topsoil as it drains through the layers
What are two facts about the humus layer?
-Darkest soil color
-It is the thinnest layer, at 2" thick
-We stand and walk on it
-Made up of leaves, plants, bugs, compost, other organic matter