CA 8th Grade Review

Front

What is adhesion?

Back

Adhesion is the property of different substances to cling to each other. For example, water molecules sticking to a leaf.

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What is cohesion?

Back

Cohesion is the property of like molecules to stick together. For example, water droplets forming on a surface.

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What is a basic solution?

Back

A basic solution is a solution that has a pH greater than 7, indicating it has more hydroxide ions (OH-) than hydrogen ions (H+).

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What is a chemical reaction?

Back

A chemical reaction is a process where substances (reactants) are transformed into different substances (products), often involving the breaking and forming of bonds.

Front

What evidence indicates a chemical reaction has occurred?

Back

The formation of gas bubbles, color change, temperature change, or the formation of a precipitate are all indicators of a chemical reaction.

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What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together in a fixed ratio.

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What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H) and oxygen (O).

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the composition is uniform throughout, such as saltwater.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the composition is not uniform, such as a salad.

Front

What is surface tension?

Back

Surface tension is the cohesive force at the surface of a liquid that makes it behave like a stretched elastic membrane.