Ch. 4 A Trip Through Geologic Time

Jawless fish were Earth's first __________, or animals with backbones.

• vertebrates

• invertebrates

• mammals

• amphibians

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

During the Cambrian Explosion that began the Paleozoic Era, the many new forms of life that evolved

• lived on land

• were invertebrates that lived in the sea

• were vertebrates covered with scales or fur

• were single-celled

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Which is the most recent?

• Cenozoic Era

• Mesozoic Era

• Precambrian Time

• Paleozoic Era

Tags

NGSS.MS-ESS1-4

The time it takes for half of the radioactive atoms in a sample of a radioactive element to decay is the element's

• relative age

• absolute age

• half-life

• potassium-argon date

Tags

NGSS.HS-PS1-8

Sometimes layers of rock are overturned so much that the youngest rock layer may appear on the bottom, which is the reverse of what is ordinarily expected.

• True

• False

Tags

NGSS.MS-ESS1-4

A(n) _________ fossil forms when dissolved minerals replace the remains of an organism and then harden to form rock.

• carbon film

• mold

• preserved

• petrified

During the Paleozoic, the first organism to live partly on land were

• invertebrates

• reptiles

• insects

• amphibians

Which best describes the climates of Europe and North America during the 1.8 million years of the Quaternary Period?

• hot and dry climates

• a series of ice ages followed by periods when the glaciers melted

• cool and rainy periods followed by droughts

• warm and mild climates

Tags

NGSS.HS-ESS3-5

What has the study of fossils allowed scientists to do?

• describe past environments and the history of life

• study present ocean temperatures at different depths

• analyze the chemical composition of sedimentary rocks and minerals

• predict which organisms will become extinct in the future

Tags

NGSS.MS-LS4-1

A(n) _________ is a gap in the geologic record where some rock layers have been lost because of erosion

• fault

• layer

• unconformity

• index fossil

Tags

NGSS.MS-ESS1-4