Rocks
Rock that forms when magma or lava cool and crystalize.
Igneous Rock
What does a sedimentary rock start off as?
sediment (sand, silt, minerals and other parts of soil)
Erodes rock under ground
groundwater
The three categories all rocks can be put into.
igneous, sedimentary, and metamorphic?
What are rock layers called?
strata
Molten rock that often flows under ground
magma
What is the most common cause of erosion?
by water
These two things are required for a metamorphic rock to form.
heat and pressure
A rock that was sediment, then went under pressure, then was melted down and crystalized or cooled inside a volcano is this type of rock.
igneous rock
What are the decayed remains of once living creatures?
Humus
The walls of the Grand Canyon are composed mostly of what kind of rock?
Sedimentary
What are some characteristics of a crystal?
only one mineral, sharp geometric shape, sharp edges and smooth sides
Inorganic crystalline substances found naturally in nature, building blocks of rocks
minerals
Weathering where rocks get broken down but they still have the same basic make up
physical weathering
Single layer of rock, less than 1 inch
lamination
One type of Igneous rock
Granite
Limestone
One type of metamorphic rock?
marble
Weathering where the composition of the rock changes
Chemical weathering
Which layer of soil is rich in humus?
top soil
Have you reached 3000 points?
Find a book full of flaps, over on top of a pile. On one of the pages it discusses a River called the_________. Who can tell me what we learned about this river? Come on girls! You know this one. Don't start to quiver.
An igneous rock that contains iron is exposed to water. The iron rusts and the rock crumbles. Is this chemical or physical weathering?
Chemical
What type of rock is laid down by water or some other agent?
sedimentary rock
These types of rocks can become sediment by weathering.
any type of rock
What is an example of physical weathering?
water freezing in rock cracks and breaking the rocks apart, wind constantly blowing a rock until it smoothes and shrinks