What is the kind of rock formed when molten lava cools and hardens
igenous
100
If you used words like, coarse, fine or medium to describe a rock, which property are you describing?
texture
100
What are the 4 layers of the earth called?
crust, inner core, outer core, mantle
100
Acid rain is an example of what?
Chemical weathering
100
About how many tons does the earth weigh?
6.6 sextillion tons
200
When you add enough heat and pressure to a sedimentary rock it will eventually become what?
Metamorphic rock
200
Why would someone do a streak test?
To discover the true colour of a mineral
200
Another name for the cracks in a volcano is.....?
fissures
200
What is frost wedging?
It is a type of weathering where water freezes and expands in the cracks of a rock and causes the rocks to break down into sediments.
200
What is measured as a 10 on Moh's hardness scale?
Diamond
300
What is the difference between a rock and a mineral?
Minerals are one pure substance, rocks are made up of at least two minerals. A mineral can become a rock but a rock can't become a mineral.
300
List 4 words used to describe the lustre of a rock or mineral.
Shiny, dull, metallic, non-metallic, pearl
300
In a volcano the main valve where magma flows is called the.....?
central vent
300
Wind is an example of weathering but it is also an example of erosion. Why is it an example of both?
It is an example of weathering when it breaks off sediments of rock after repeatedly hitting against the side of a rock. It is an example of erosion when it carries the sediments and pieces of rock away.
300
The metamorphic rock marble is formed from the sedimentary rock ____________.
limestone
400
What do you call plants and animals that are preserved in rocks?
fossils
400
What kind of test would you use a fingernail, a penny, a nail or an emery file for?
hardness test
400
The outer layer of the earth, made of rock is called....?
crust
400
Explain how ice (glaciers) are an example of erosion.
Glaciers slowly and gradually move and are so heavy that they carry the rocks underneath them with them.
400
What tune is the rock cycle song to?
Row Row Row your boat
500
Pumice is an example of what kind of rock?
igneous
500
The way a rock breaks is called the ________?
Cleavage
500
The opening of a volcano where magma explodes and becomes lava is called...?
crater
500
Explain how plants are an example of weathering
The roots of plants can grow in between rocks and in their cracks, as they get stronger they break the rocks and break off sediments.