Ch.2 4th ABC Book

What are fossils?

• Remains of ancient plants and animals

• Pieces of modern buildings

• Types of rocks

• Forms of water

Who studies fossils?

• Geologists

• Paleontologists

• Biologists

• Chemists

What is sediment?

• Large rocks

• Sand and tiny pieces of soil

• Water and air

• Metal and glass

How do fossils help scientists?

• They tell scientists about the history of Earth

• They make plants grow faster

• They create new animals

• They change the weather

What can fossils tell scientists about the environment?

• If it was wet or dry, hot or cold

• How many trees were there

• The color of the sky

• The taste of the water

What can fossils tell scientists about Earth's past?

• The future climate

• The location of ancient cities

• Information about past organisms and environments

• The color of ancient plants

What does the Law of Superposition state about rock layers?

• Each layer is younger than the one below it

• Each layer is older than the one above it

• Each layer is the same age

• Each layer is made of the same material

What is a fossil?

• A living organism

• A type of rock

• The remains or impression of an organism from the past

• A type of plant

How do scientists use rock layers to learn about the past?

• By measuring their temperature

• By reading the order of layers

• By counting the number of rocks

• By observing their color

What is a mold fossil?

• Forms when sediments bury an organism and the sediments change into rock.

• Forms when a mold is filled with sand or mud that hardens into the shape of the organism.

• Forms when minerals soak into the buried remains, replacing the remains and changing them into rock.

• Forms when entire organisms or parts of organisms are prevented from decaying by being trapped in rock, ice, tar, or tree sap.