Science 7 Final Exam Review

Front

What is the movement of atoms and molecules in a solid?

Back

Atoms and molecules in a solid shake back and forth in place.

Front

What is an inhibitor in a chemical reaction?

Back

An inhibitor is a substance that slows down or prevents a chemical reaction.

Front

How is temperature measured?

Back

Temperature is usually measured in degrees with a thermometer.

Front

What determines whether a substance is a solid, liquid, or gas?

Back

Whether a substance is a solid, liquid, or gas depends on how close its atoms are to one another and how free the atoms are to move.

Front

What is a catalyst?

Back

A catalyst is a substance that speeds up a chemical reaction without being consumed in the process.

Front

What is the definition of a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

What is the difference between a solid and a liquid?

Back

In a solid, atoms are closely packed and vibrate in place, while in a liquid, atoms are close but can flow past one another.

Front

What is the role of temperature in states of matter?

Back

Temperature affects the energy of atoms and molecules, influencing whether a substance is a solid, liquid, or gas.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.

Front

What is the definition of a chemical reaction?

Back

A chemical reaction is a process where substances (reactants) are transformed into different substances (products).