Which of these is an example of a chemical change?

When two populations can no longer interbreed, they have

A mixture composed of substances that are spread evenly throughout is called

How does adaptation help an organism?

Fossil records can reveal changes in the environment over time. Scientists have found fossils of marine animals on the tops of mountains in Canada. What does this tell us about the history of the environment in that area?

Modern scientific explanations of how species have changed over time

What is necessary for a substance to burn?

Which one of the following in the Periodic Table of Elements tells the physical state of an element at room temperature?

Which of the following statements best describes the particles of a liquid?

When using a triple-beam balance to measure mass, which is not necessary to get an accurate reading?

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