Lessons 3 and 4 Mystery Science Birth of Rocks

What is erosion?

• The process of rocks breaking into smaller pieces

• The movement of tiny rock bits from one place to another by water, wind, ice, or gravity

• The process of sediment settling on a surface

• The remains of a plant or animal that lived a long time ago

Which process involves water freezing and expanding to break rocks apart?

• Root wedging

• Weathering

• Ice wedging

• Deposition

What is a canyon?

• A high area of land with very steep sides

• A deep hole in the ground formed over a long time by moving water

• A habitat covered in water and filled with many trees

• A type of rock formed when sediments settle and press together

How does root wedging occur?

• By water freezing and expanding

• By plant roots growing and breaking rocks apart

• By sediment settling on a surface

• By rocks rolling down a mountain

Why are rocks at the bottom of a mountain smoother?

• They are formed by sediment settling and pressing together

• They have been burned for energy

• They have rolled down the sides and become smoother

• They are covered in water

What is the difference between weathering and erosion?

• Weathering involves breaking rocks into smaller pieces, while erosion involves moving those pieces

• Weathering involves moving rocks, while erosion involves breaking them

• Both involve the movement of rocks

• Both involve the breaking of rocks

Which of the following is the dark layer of rock located between the fossils in colossal canyon?

• Sedimentary rock

• Coal

• Sediment

• Aquatic

What is the process of sediment falling and settling on a surface called?

• Erosion

• Weathering

• Deposition

• Ice wedging

How does a swamp differ from a canyon?

• A swamp is a high area of land, while a canyon is underwater

• A swamp is covered in water and filled with trees, while a canyon is a deep hole formed by water

• A swamp is formed by moving water, while a canyon is filled with trees

• A swamp is a type of rock, while a canyon is a habitat

What is sedimentary rock?

• A dark rock made from fossil plants

• A type of rock formed when sediments settle and press together over a long time

• The remains of a plant or animal

• A habitat covered in water