Unit 1 Chemistry Exam revised

Front

What is an example of a physical change?

Back

Freezing is an example of a physical change.

Front

How do you classify soup?

Back

Soup is classified as a heterogeneous mixture (HE).

Front

In a compound, how are the elements combined?

Back

In a compound, the elements are bonded together.

Front

How do you classify salt water?

Back

Salt water is classified as a homogeneous mixture (HO).

Front

How do you classify sugar water?

Back

Sugar water is classified as a homogeneous mixture (HO).

Front

What is the difference between a compound and a mixture?

Back

In a compound, elements are chemically bonded; in a mixture, substances are physically blended.

Front

Define an element in chemistry.

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the components are not uniformly distributed and can be easily distinguished.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the components are uniformly distributed and cannot be easily distinguished.

Front

Give an example of a compound.

Back

Water (H2O) is an example of a compound.