Types of Rocks
Minerals
Properties
Land Changes
More Rocks
100
Which rocks are formed by intense heat and pressure?
Metamorphic rocks.
100
What are rocks made up of?
A mixture of more than 1 mineral.
100
What are the 5 physical properties of minerals?
Color, streak color, luster, hardness, and cleavage.
100
An earthquake which leaves a crack in the Earth is an example of fast __________.
Weathering.
200
Which rocks are formed by layers that are cemented over time?
Sedimentary rocks.
200
Which mineral is the hardest on Earth?
Diamond
200
You have dragged a mineral across a tile and observed the dust left behind. You have just tested the physical property called _________.
Streak color
200
The landform shown below was most likely weathered and eroded by ________.
Wind and sediments.
300
Which rocks are formed by cooling magma or lava?
Igneous rocks.
300
Why is pyrite called "fool's gold", and how can you tell it apart from real gold?
It has the appearance and luster of gold, but leaves a greenish-black streak, crumbles easily, etc.
300
The way a mineral's surface reflects light is also known as its _______.
Luster.
300
If an igneous rock is broken by weathering, it turns into ___________.
Sediments
300
Which type of rock can sometimes have evidence of trapped air bubbles?
Igneous rocks.
400
In which type of rock are you most likely to find fossils or plant and animal remains?
Sedimentary rocks.
400
You are testing minerals. You are able to scratch your mineral with a glass plate (hardness: 5.5), but unable to scratch it with your fingernail (hardness: 2.5). What can you conclude about your mineral?
Your mineral has a hardness greater than 2.5, but less than 5.5. Your mineral is somewhere in between.
400
What is a physical property?
Something that can be observed using our senses.
400
What is called when sediments are dropped off in a new location?
Deposition
400
Which type of rock can be identified by it's different-colored, ribbon-like layers?
Metamorphic rocks.
500
Which type of rock most commonly contains crystals?
Metamorphic rock.
500
What is the name of the scale used to measure the hardness of minerals?
Moh's Scale
500
A mineral's cleavage can be described as _______.
The uniformity and predictability of its breakage.
500
What is the difference between physical weathering and erosion?
Weathering breaks rocks down into sediments, while erosion carries sediments to a new location.
500
Obsidian and pumice are examples of which type of rock?
Igneous rocks