The History of Planet Earth Elevate

One of the units of geologic time into which geologists divide eras.

• period

• amphibian

• reptile

• mammal

Tags

NGSS.MS-ESS1-4

When many types of living things become extinct at the same time.

• geological time scale

• mass extinction

• relative age

• absolute age

Tags

NGSS.MS-LS4-1

A gap in the geologic record that shows where rock layers have been lost due to erosion.

• unconformity

• geological time scale

• law of superposition

• absolute age

The process of determining the age of an object using the half-life of one or more radioactive isotopes.

• geological time scale

• relative age

• radioactive decay

• radioactive dating

A record of the geologic events and life forms in Earth's history.

• geological time scale

• radioactive dating

• absolute age

• relative age

Tags

NGSS.MS-ESS1-4

A vertebrate whose body temperature is regulated by its internal heat, and that has skin covered with hair or fur and glands that produce milk to feed its young.

• mammal

• amphibian

• reptile

• invertebrate

Tags

NGSS.MS-LS4-2

An animal without a backbone.

• invertebrate

• vertebrate

• mammal

• reptile

A vertebrate whose body temperature is determined by the temperature of its environment, and that lives its early life in water and its adult life on land.

• reptile

• mammal

• invertebrate

• amphibian

A vertebrate whose temperature is determined by the temperature of its environment, that has lungs and scaly skin, and that lays eggs on land.

• mammal

• reptile

• amphibian

• invertebrate

Tags

NGSS.MS-LS4-2

One of three long units of geologic time between the Precambrian and the present.

• period

• absolute age

• unconformity

• era

Tags

NGSS.MS-ESS1-4