Rocks & Fossils
How are sedimentary rocks formed?
Rocks are broken down through weathering and settle in layers upon layers
What is weathering?
When rocks are broken down into smaller pieces called sediments
What is erosion?
Rocks and sediments are carried away by wind or water
What is deposition?
When sediments are settled or deposited in a new location
What is a nonrenewable resource?
a resource that cannot be made again within our lifetime
What is the only type of rock that is made of sedimentary, igneous, and metamorphic rocks together?
Metamorphic
True or false: weathering happens before erosion
True!
What are the two main agents of erosion?
wind and water
slow down or stop
conserve, use alternative energy resources
What is formed after time when an organism dies and is quickly covered by sediments?
What is frost wedging?
Water falls between cracks in a rock then freezes, causing the rock to crack even more
What is most likely to be removed from your yard by erosion? A. Your car B. Your creek C. Dirt next to the porch D. A rock
C. Dirt next to the porch
True or false: deposition happens before erosion
False!
Which of the following uses alternative energy as fuel (select all that apply):
A. wind turbine
B. solar panels
C. nuclear power plant
A (wind turbine) and B (solar panels)
How are igneous rocks formed?
Magma from the earth's mantle is cooled
True or false: rocks dissolving or decaying is an example of weathering
True
What is the best way to stop erosion from happening in your yard?
Plant more plants!
What is created when wind deposits large amount of sand in one area?
sand dunes
Plants and animals would be considered a:
A. renewable resource
B. nonrenewable resource
C. alternative resource
A. renewable resource
The rock cycle can be best described as:
A. a process in which rocks turn into organisms
B. a process in which organisms are turned into rocks
C. a process in which heat and pressure change the properties of rocks and sediments
C. a process in which heat and pressure change the properties of rocks and sediments
True or false: trees growing through rocks and sidewalks is an example of weathering
True
A. cover the field with a tarp
B. water the dirt more often
C. stop the rain
D. plant grass
D. plant grass
What is is called when sediments are carried by the flow of water and are deposited at the mouth of a river?
a delta
Geothermal energy and solar energy are considered:
A. renewable resources
B. nonrenewable resources
C. alternative energy
C. alternative energy