What is weathering?
The process that breaks rocks into smaller pieces
What's an example of physical weathering?
?
What happens during chemical weathering?
Rocks change into new materials
What is erosion?
The movement of rock pieces from one place to another
Which choice does NOT cause erosion?
gravity
ice
Fossil formation
wind
What is deposition?
When moving rock pieces settle or drop in a new place
Which is an example of deposition?
a river dropping sand to form a delta
acid rain dissolving rock
wind blowing sand off a cliff
a glacier scraping a rock as it moves
What do tectonic plates do?
move very slowly and change the Earth's surface over millions of years
Which idea explains that continents were once joined in a supercontinent called Pangaea?
erosion hypothesis
deposition theory
plate tectonics
continental drift theory
Why is sedimentary rock the best place to find fossils?
It forms gently in layers
