Which of the following elements makes up about 21% of the Earth's atmosphere?

Which of the following is the most abundant element found in the Earth's atmosphere?

The reactants in a chemical equation are located _________________________.

The products in a chemical equation are located _____________.

A student observes actions that occurred in four different eggs. Which action describes ONLY a chemical change.

Which of the following is a physical change?

When copper reacts with oxygen in the air, a color change takes place that turns the surface of the copper green. What type of change occurs to produce this color change?

Which of the following is a compound?

Which group of substances below contains only single elements?

Which is an example of a physical change?

An element appears in the far right column of the periodic table. What can you conclude about the element based on this information?

What happens to the molecules in a lump of butter as the butter melts?

Which of these is the smallest particle of matter?

The variable in a scientific experiment that is measured is called the ______________.

Which of the following pieces of lab equipment should be used to measure mass in grams?

Which of the following pieces of lab equipment should be used to measure weight in newtons?

Which of the following pieces of lab equipment would be the best choice for measuring 100 ml of water?

Which of these must form when two elements join together during a chemical change?

Which of the following describes the molecules within a gas?

In a scientific experiment the variable that is manipulated by the scientist is called the ______________________.

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