Show:
fire
soil
rocks
minerals
weathering and eroison
100
What does fire rock mean?
Igneous
100
what is the best soil for plants?
loam
100
What are rocks made of?
minerals
100
what is the minerals streak?
it is the color of the powder left behind on something.
100
what is weathering?
it is the breaking down of rocks into smaller pieces.
200
True or False? Igenous rocks come from volcanoes?
True
200
what is soil made of?
broken down plants and animals
200
what are rocks?
a nonliving material that has one or has one or more minerals
200
what is the hardest mineral?
diamond.
200
what is erosion?
the movement of weathered rock
300
Name 2 types of igneous rocks.
granite basalt pumice obsidian
300
what are the three layers of soil?
topsoil,subsoil,and bedrock
300
what are igneous rocks?
they are rocks made from volcanos
300
what is the softest mineral?
talc
300
how is erosion caused?
water caries broken down rocks away
400
How do igneous rocks form?
From volcanoes
400
how is soil formed?
weathering
400
what are metamorphic rocks?
a rock that hasbeen changed by heating and squeezed
400
what is the minerals luster?
how light bounces off of it.
400
how is weathering caused?
by wind and water hitting rocks
500
what is basalts color?
black
500
why is soil important?
helps plants grow and animals live there.
500
what are sedamintry rocks
rocks that have been pressed together
500
what is a mineral?
a solid,nonliving substance found in nature.
500
Name 2 ways to prevent erosion.
plant trees terracing barriers