The Eras of Time Vocabulary

Earth's current geological era, representing the last 66 million years of Earth's history. It is characterised by the dominance of mammals, birds, and angiosperms. It is the latest of three geological eras.

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

• Precambrian Period

• Cambrian Period

Tags

NGSS.MS-LS4-2

The first of three geological eras of the Phanerozoic Eon. Beginning 538.8 million years ago, it succeeds the Neoproterozoic and ends 251.9 Ma.

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

• Precambrian Period

• Cambrian Period

Tags

NGSS.MS-ESS1-4

The second-to-last era of Earth's geological history, lasting from about 252 to 66 million years ago, comprising the Triassic, Jurassic and Cretaceous Periods

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

• Precambrian Period

• Cambrian Period

Tags

NGSS.MS-ESS1-4

The first geological period of the Paleozoic Era, and of the Phanerozoic Eon

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

• Precambrian Period

• Cambrian Period

Tags

NGSS.MS-ESS1-4

The earliest part of Earth's history, set before the current Phanerozoic Eon.

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

• Precambrian Period

• Cambrian Period

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.

• Amphibian

• Reptile

• Mammal

• Vertebrate

• Invertebrate

Tags

NGSS.MS-LS4-2

An animal without a backbone.

• Amphibian

• Reptile

• Mammal

• Vertebrate

• Invertebrate

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.

• Amphibian

• Reptile

• Mammal

• Vertebrate

• Invertebrate

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

• Amphibian

• Reptile

• Mammal

• Vertebrate

• Invertebrate

An animal without a backbone.

• Amphibian

• Reptile

• Mammal

• Vertebrate

• Invertebrate