Geologic Time Scale - Grade 9 Science

This worksheet covers key concepts related to the Geologic Time Scale, including eons, eras, periods, and significant events in Earth's history.

Grade 9 Science Earth & Space ScienceGeologic Time

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Includes

Multiple ChoiceFill in the BlanksTrue / FalseMatchingShort Answer

Standards

NGSS.HS-ESS2-7NGSS.HS-ESS1-5

Topics

geologic timeearth sciencegeologypaleontologygrade 9

7 sections · Free to use · Printable

Geologic Time Scale

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Read each question carefully and answer to the best of your ability. Use your knowledge of the Geologic Time Scale to complete the tasks.

1. Which of the following represents the largest division of geologic time?

Era

Period

Epoch

Eon

2. The Mesozoic Era is known as the 'Age of '.

Mammals

Fish

Dinosaurs

Reptiles

3. The Geologic Time Scale is divided into units based on significant and biological events.

4. The Cambrian Explosion, a period of rapid diversification of life, occurred during the Period.

5. The Cenozoic Era is the current era of geologic time.

True

False

6. Mass extinctions mark the boundaries between different geologic periods.

True

False

Match each geologic time division with its approximate duration.

7. Eon

a. Tens to hundreds of millions of years

8. Era

b. Billions of years

9. Period

c. Millions of years

10. Briefly explain why the Geologic Time Scale is not divided into equal increments of time.