Vocabulary

Question 1

Matter

Answer 1

is anything that has mass and takes up space (volume). is either a mixture or it is a pure substance.

Question 2

Density

Answer 2

is the amount of matter in a given volume.

Question 3

2 kinds of mixtrues

Answer 3

Homogeneous mixtures (the same throughout; solutions) & Heterogeneous mixtures (different throughout).

Question 4

2 kinds of pure substances

Answer 4

Elements (made of only one type of atom)
Compounds (made of two or more elements chemically combined)

Question 5

Physical properties

Answer 5

can be observed or measured without changing the composition of matter

Question 6

Density

Answer 6

The mass of a substance per unit volume.

Question 7

Melting point

Answer 7

The temperature at which a solid becomes a liquid.

Question 8

Color

Answer 8

The visual appearance of a substance

Question 9

Hardness

Answer 9

Resistance of a material to scratching or indentation.

Question 9

Boiling point

Answer 9

The temperature at which a liquid turns into a gas.

Question 10

Chemical properties

Answer 10

are any of the properties of matter that may only be observed and measured by performing a chemical change or chemical reaction. cannot be determined by touching or viewing a sample; the structure of the sample must be altered for the chemical properties to become apparent.

Question 11

Flammability

Answer 11

The ability of a substance to burn.

Question 11

Corrosiveness

Answer 11

The tendency of a substance to cause corrosion or deterioration of materials

Question 12

Reactivity

Answer 12

How a substance interacts with other substances to form new compounds

Question 13

Toxicity

Answer 13

The harmful effects of a substance on living organisms.

Question 14

Precision

Answer 14

reflects how well a series of measurements agree with each other, whether or not any of them are close to the true value. For the values to also be precise, they would need to be very close to each other (whether or not they hit the mark).

Question 14

Oxidation

Answer 14

The reaction of a substance with oxygen, often resulting in rust or decay.

Question 15

Accuracy

Answer 15

is defined as coming close to a true or desired value, like the center of a bullseye