Weathering and Erosion
What layer is the darkest and richest with humus?
Horizon A
An igneous rock with large crystals most likely formed from molten rock that cooled
Slowly far below the surface of the Earth
How old is the earth?
4.6 billion years old
What can prevent floods?
building retention ponds
What is the main cause of mass movement?
gravity
Rocks get broken down into smaller pieces or changed because of wind, water, and other elements by a process called
Weathering
How are rocks classified?
Igneous sedimentary rock and metamorphic
What is the term for putting rocks in order of age based on location?
relative dating
What causes eutrophication?
detergents and fertilizers
When a large block of material moves downslope this is called?
landslide
Sediments are moved from one place to another by water wind humans gravity and animals by a process called
Erosion
Gravel and pebbles cemented together form what type of rock?
Sedimentary
A scientist determined that a fossil is 425 million years old this is an example of
Absolute Dating
When rivers reach a large body of water what forms because of the sediment being deposited?
delta
What is the term for water falling to the ground from clouds?
precipitation
What is an example of chemical weathering
Acid rain eating away limestone
All rocks are made up of?
Minerals
Which era do humans live in?
Cenozoic
What is the term for a curve or bend in a river?
meander
What mineral property is the least useful?
color
Soil is formed by
Broken down rocks and minerals
What are we testing for when we rub a mineral against ceramic tile?
Streak
What era is known as the age of the dinosaurs?
Mesozoic
What is the term for a small river that flows into a larger one?
tributary
Coal is made from?
dead plants and organisms