Unit Test — Unit test

Question 18 • WI-Grade 8 Life Science A

At one time in the Earth’s history, many people thought the world was flat. Which best explains why the model of the Earth is now round?

Answer

Models are limited by the science—the more that was discovered, the better the model could be made.

Models are a representation of products to be made in future and are modeled after what people thought the earth might look like.

Models can only show representations of what is small, so the Earth’s model was poorly constructed.

Models can be changed and remodeled even if there is not enough science to support the change.

Explanation

Scientific models are based on the evidence and knowledge available at the time. As people made more observations and discoveries about Earth, they developed stronger evidence that Earth is round, so the model improved. Choice A best explains this change; models should be supported by evidence, not changed without enough science.

AI-written and checked against the verified answer.

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