Properties of Rocks
What tool can we use to learn about a rock's luster?
What is the rock cycle?
The rock cycle is a process where overtime minerals become rocks and are continually changed into igneous, sedimentary, or metamorphic rocks.
What are the three categories of rocks?
Igneous, Sedimentary, and Metamorphic
Where are most rocks formed?
a) in caves
b) in the ocean
c) on mountains
d) underground
d) underground because of the heat and pressure
What is the test called where we scrape a mineral across a marble plate?
The streak test
What two things do minerals need to become rocks?
Heat and pressure
The word meta- in metamorphic means what?
Meta means to change from one thing to another.
Give an example of a type of mineral that we see in our everyday lives.
concrete, jewels (diamonds, rubies), copper (pennies), silver, gold
What physical property can be observed when we scratch a mineral with our fingernail?
Hardness
Name a landform that has been created because of the rock cycle, weathering, and erosion.
Examples: the Grand Canyon, islands, lakes, etc.
What natural disaster could result in the formation of igneous rock?
a) hurricane
b) volcanic eruption
c) flooding
b) volcanic eruption
What is the difference between a rock and a mineral?
Minerals are made up of ONE specific matter, but rocks are made up of more than one mineral/matter.
What is cleavage?
Cleavage is when a rock or mineral always breaks in some sort of pattern.
Sedimentary rock layers are formed when smaller rocks like sand are under pressure over a long period of time.
True, sedimentary rocks form when small layers are formed and new layers form over top.
What type of rock is known to have fossils in its layers?
Sedimentary Rocks
True or false:
Fossils found in bottom layers of rock are older than fossils found in the top layer of rocks.
True, normally the layers of rock tell us when plants and animals died.
True or false:
A mineral will always be the same color as its streak in the streak test.
False, some minerals will have a different streak color than the color they look on the outside.
What is another word for the hot lava that eventually cools to become igneous rock?
Compare the similarities and differences between igneous rocks, sedimentary rocks, and metamorphic rocks.
What natural disasters or changes can cause a shift in the rock layers revealing fossils?
Earthquakes, changes in the tectonic plates, weathering and erosion, flooding, etc.