Rocks
Which of these is not a type of rock: Igneous, Sedimentary, Cement, or Metamorphic?
Cement
All rocks are made of one or more of this: ______
Minerals
List these in order from smallest to largest: silt, gravel, boulder, sand, gravel, clay
clay → silt → sand → gravel → cobble → boulder
Which would most likely contain the most humus: bedrock, top-soil, sub-soil, or sand?
Top-soil
True or False: Rocks change over time.
True
Which type of rock: Cooled, hardened, molten rock
Igneous
Name two of the elements that can establish the age of rocks
Uranium, potassium, or carbon
How are sediments moved?
By wind and water
What is the theory that rigid fragments of Earth’s surface move relative to one another?
Plate tectonics
True or False: Rocks are not necessarily formed at their current location
True
Which type of rock: Form from weathered pre-existing rocks
Sedimentary
Why can uranium, potassium, and carbon date rocks?
They are radioactive and they change over time
How are sediments formed?
By physical and chemical weathering
Underground caves are produced by the action of: glaciers, wind, acid rain, or plant roots?
Acid rain
True or False: Fossils form quickly after a material gets stuck in a rock.
False: It takes a long time for fossils to form.
Which type of rock: A rock that has changed due to heat and pressure
Metamorphic
Where are most fossils found? In which type of rock?
Sedimentary
Where do most sedimentary rocks form?
On the surface of the Earth and underwater.
What is a half-life?
The amount of time it takes for an element to decay.
True or False. All rock has existed since the formation of the Earth.
False
What is the continuous series of changes that rocks undergo?
Rock Cycle
What information do fossils give us?
Fossils tell us about the past environment and climate.
How do rivers transform sediments?
River water levels fall and rise, paths change over time, floods and droughts happen which affect the power and velocity of the river's flow.
What processes do scientists use to support the idea that the Earth's land mass can move?
Fossils, rock types, shapes of the continents, and GPS
True or False: Rocks are minerals are the same thing.
False. Rocks are composed of minerals which are naturally existing chemical compounds.