4th Grade Science: Chapter 6

What are strata?

• Layers of water
• Layers of rock
• Layers of air

What are fossils?

• Living organisms
• Mineralized remains or evidence of past life
• Pieces of sediment

A mark, footprint, trail, or burrow of a plant or animal.

• mold
• trace
• true form

Plant or animal dies and is covered by sediment.

• mold
• trace
• true form

Minerals fill inside of a mold fossil.

• cast
• trace
• true form

Part of a plant or animal.

• cast
• trace
• true form

What information can fossils provide about past environments?

• Clues about the size of organisms
• Clues of the color of the sky
• Clues into whether organisms lived on land or in water

How do layers of sedimentary rocks typically form?

• New layers form on top of older ones
• By the movement of tectonic plates
• By volcanic eruptions

Do rocks form by hardening into different layers and creating patterns that are parallel to the Earth's surface, known as horizontal patterns?

• Yes
• No

__________ from deep in the Earth gets pushed into the layers. When it cools, ______________ rock is formed.

• magma, sedimentary
• magma; igneous
• rumbles; solid