8th Grade Science Ohio Semester 1 Final Study Guide

Front

What is the reason for similar fossils in Africa and South America?

Back

The presence of similar fossils in Africa and South America supports the theory of continental drift, suggesting that these continents were once connected.

Front

What is the geologic time scale?

Back

The geologic time scale is a system used by geologists to divide Earth's history into smaller, more manageable units.

Front

Which planet rotates the fastest?

Back

Jupiter is the planet that rotates the fastest in our solar system.

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What is an intrusion in geology?

Back

An intrusion is a mass of igneous rock that forms below the Earth's surface.

Front

What percentage of radioactive material remains after 4 half-lives?

Back

After 4 half-lives, 6.25% of the original radioactive material remains.

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What is a fossil?

Back

A fossil is the preserved remains or traces of ancient organisms.

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What is the scientific method?

Back

The scientific method is a systematic process for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge.

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What are scientific models?

Back

Scientific models are representations of objects, systems, or concepts that help explain and predict scientific phenomena.

Front

What is continental drift?

Back

Continental drift is the theory that continents move across the Earth's surface over geological time.

Front

What is an index fossil?

Back

An index fossil is a fossil that is used to define and identify a particular time period in the geologic time scale.