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