A Trip Through Earth's History

The earliest life forms were ____.

• dinosaurs

• single-celled organisms

• fossils

• vertebrates

The relative age of a rock is ____.

• its age compared to the ages of other rocks

• less than the age of the fossils the rock contains

• the number of years since the rock formed

• its age based on how much carbon-14 the rock contains

Tags

NGSS.MS-ESS1-4

The law of superposition states that, in horizontal layers of sedimentary rock, each layer is ____.

• younger than the layer above it and older than the layer below it

• neither older nor younger than the other layers

• older than the layer above it and younger than the layer below it

• always older than any vertical layers

Tags

NGSS.MS-ESS1-4

____ can provide clues about the activities of ancient organisms.

• Trace fossils

• Remains preserved in amber

• Carbon films

• Molds and casts

Tags

NGSS.MS-LS4-1

A fossil formed when minerals replace all or part of an organism is called a ____.

• mold

• petrified fossil

• cast

• trace fossil

How do most fossils form?

• Living things die and their remains are buried by sediments.

• The hard parts of an organism dry out in the air.

• The soft parts of an organism change to stone.

• Freezing preserves the remains of an organism.

Tags

NGSS.MS-LS4-1

The geologic time scale is a record of ____.

• the thickness of sedimentary rock layers

• the rate of fossil formation

• the life forms and geologic events in Earth's history

• the time since the evolution of dinosaurs

Tags

NGSS.MS-ESS1-4

A type of organism that no longer exists on Earth is said to be ____.

• fossilized

• sedimentary

• extinct

• petrified

Tags

NGSS.MS-LS4-1

A fossil is ____.

• any dead organism.

• the preserved remains or traces of an organism.

• a perfect copy of a rock.

• an unusual type of rock.

Tags

NGSS.MS-LS4-1

The process by which all the different kinds of living things have changed over long periods of time is called ____.

• sedimentation

• replacement

• deposition

• evolution

Tags

NGSS.MS-LS3-1

NGSS.MS-LS4-1

NGSS.MS-LS4-2

NGSS.MS-LS4-4