1.4 Geologic Time

Question 1

How are eras and periods of the geologic time scale named?

Revolt · Accepted Answer

They are named for the places where geologists first described rocks or fossils from that time.

Question 2

oceans✔ fossilsthe atmosphere

Revolt · Accepted Answer

✔ fossils

Question 3

✔ PrecambrianPaleozoicCenozoic

Revolt · Accepted Answer

✔ Precambrian

Question 4

before ✔ after during

Revolt · Accepted Answer

✔ after

Question 5

Fill in the blanks to complete each statement about the age of Earth.

Revolt · Accepted Answer

billion; radiometric

Question 6

Order these events from oldest (1) to most recent (4).

Revolt · Accepted Answer

✔ 2; Dense melted material sank to form the core.: 2; Earth’s gravity captured gases to form the first atmosphere.: 4; Dust, rock, and ice were pulled together by gravity.: 1; Less dense material cooled, hardened, and formed the crust.: 3

Question 7

1 2 3 ✔ 4

Revolt · Accepted Answer

✔ 4

Question 8

✔ 1 2 3 4

Revolt · Accepted Answer

✔ 1

Question 9

1 2 ✔ 3 4

Revolt · Accepted Answer

✔ 3

Question 10

Use the drop-down menus to match each description to the geologic era it describes.

Revolt · Accepted Answer

Mesozoic; Cenozoic; Paleozoic

1.4 Geologic Time Answers

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