Ch 1

Question 1

Chemistry is:

Answer 1

• the study of matter and its changes
• known as the central science
• relates to biology, physics & geology

Question 2

What is Matter?

Answer 2

• Matter is anything that has mass and takes up space.

* Matter has both physical and chemical properties

Question 3

Physical properties are:

Answer 3

• Characteristics observed or measured without changing the identify of a substance.
• Shape, physical state, odor, boiling and freezing points, density, and color of that substance.

Question 4

Solids

Answer 4

Have definite volumes and shapes

Question 5

Liquids

Answer 5

Have definite volumes, but take the shapes of containers

Question 6

Gases

Answer 6

Have no definite volumes or shapes

Question 7

Physical Changes are those that occur without changing the identity of the substance

Answer 7

• Phase changes (changes in physical state)
• Dissolving
• Mixing (without a reaction)

Question 8

Chemical properties describe the ability of a substance:

Answer 8

• To interact with other substances

* To change into a new substance

Question 9

Alchemists

Answer 9

• Attempted to turn base metals into gold

* Attempted to find the “Elixir of Life”

Question 10

Scientific Method

Answer 10

The scientific method is the process used by scientists to explain observations in nature.

Question 11

The scientific method involves:

Answer 11

• Making Observations
• Writing a Hypothesis
• Doing Experiments
• Proposing a Theory

Question 12

Periodic Table

Answer 12

• Primary resource for a chemist as well as other scientists.
• Lists all the known elements in a “periodic way”

Question 13

Element

Answer 13

a substance that can not be broken down into simpler substances by chemical means.