Focus #20

Many species that lived in the past no longer exist today. So how do we know about them?

• Books

• Internet

• Word-of-Mouth

• Fossils

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

Conversely, not all of today’s living species were alive in the past. Evidence of this is also found in the form of __________.

• Rocks

• Bones

• Fossils

• Soil

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NGSS.MS-LS4-1

Fossils are the preserved remains of organisms that lived long ago. According to the law of ________________________, the rock layers that contain the oldest fossils should be farthest below Earth’s surface.

• Superstition

• Superposition

• Supercalifragilisticexpialidocious

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NGSS.MS-ESS1-4

A __________________ is a permanent change in the genetic makeup of an organism.

• Mutation

• Adaptation

• Natural Selection

• Evolution

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NGSS.MS-LS3-1

Organisms with traits that are best suited for their environments are likely to have a greater chance for survival. These helpful traits, which arise due to genetic mutations, are known as _____________________.

• Mutation

• Adaptations

• Natural Selection

• Evolution

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NGSS.MS-LS4-4

All living things that are best adapted to their environments will be more likely to survive. This idea is known as _____________________ ____________________.

• Mutation

• Adaptations

• Natural Selection

• Evolution

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NGSS.MS-LS4-4

In 1859, Charles Darwin proposed a theory based on the concept of natural selection. His theory explains the evidence of the gradual changes of all organisms over millions of years. This theory is known as the Theory of __________________.

• Mutation

• Adaptations

• Natural Selection

• Evolution

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NGSS.MS-LS4-2

NGSS.MS-LS4-4

Fossils show physical similarities between organisms and their ancient ancestors. If such similarities were observed between today’s birds and ancient reptiles, what theory could possibly be proposed?

• Birds evolved from reptiles

• Reptiles are not similar to birds

• Chicken pot pie

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

Why is relative dating useful? What does it tell scientists?

• It tells scientists the exact, precise age of specimens.

• It tells scientists the approximate age of specimens, compared to other known examples.

• Scientists rarely use relative dating.

• Relative dating is the best way to learn about Earth's history.

Tags

NGSS.MS-ESS1-4

How does radioactive dating help scientists? What information does it provide?

• It tells scientists the exact, precise age of specimens.

• It tells scientists the approximate age of specimens, compared to other known examples.

• Scientists rarely use relative dating.

• Relative dating is the best way to learn about Earth's history.

Tags

NGSS.HS-ESS1-6

NGSS.HS-PS1-8