If a mineral is softer than a paper clip, what else could scratch it?
An aluminum nail and your fingernail
100
Rocks are made out of two or more _____________.
minerals
100
What type of rock forms when molten rock is cooled beneath Earth's surface?
Igneous Rock
100
What process can erode hillsides the fastest?
landslides
100
What type of weathering occurs when roots of trees and bushes reach down into cracks in rocks? Physical or Chemical?
Physical Weathering
200
A mystery metal has a hardness of 3 and is gray. Which metal could it be?
Metal Color Density Hardness
______________________________
aluminum white 3 2
Silver gray 11 3
Zinc gray 7 2
Silver
200
Sandstone is an example of what kind of rock.
Sedimentary
200
What type of rock is characterized by having layers?
Sedimentary rock
200
A _________ can create new rock in a short amount of time. In a few years that new rock can become a mountain.
volcano
200
What is a fan-shaped dposit at the mouth of a river?
delta
300
How do we know that marble is made of calcite?
It will fizz and bubble
300
When sandstone gets pushed into Earth's crust, it changes into quartzite. What kind of rock is quartzite?
Metamorphic
300
How does a rock change into a metamorphic rock?
It is exposed to high heat and pressure underground.
300
__________ last only a few seconds and can change landforms faster than any other natural event.
Earthquakes
300
How was the Grand Canyon formed?
A river removed rock and soil.
400
What describes the way light reflects off a mineral's surface?
Luster
400
What happens when water gets into cracks in rocks?
It can freeze and break the rock along the crack.
400
Describe how sedimentary rocks are formed.
Small pieces of sediments are pressed together and become hard.
400
_________ occur when rocks and soil slide downhill.
Landslides
400
How are deltas, a large amount of sand and mud near the ocean, formed?
The sediments are moved from the land by rivers.
500
When you rub a mineral on a tile it can leave some mineral powder. This is called what?
Streak
500
When minerals in rocks are changed by carbon dioxide gas or salt, what occurs?
Chemical weathering
500
Which type of rocks can contain fossils of shells or plants?
Sedimentary rocks.
500
____________ moves the sand from the mountains to the beach.