Science Study Guide (test - 1/26/17)

Question 1

What is an element?

Answer 1

A substance that cannot be broken down into smaller pieces

Question 2

What is a compound?

Answer 2

A substance that is made from two or more simpler substances, can be broken down into either an element or simpler compounds and chemically combined

Question 3

Compound or element: H

Answer 3

Element

Question 4

Compound or element: NaCl

Answer 4

Compound

Question 5

What is a homogenous mixture?

Answer 5

The substances are so evenly distributed that it is difficult to distinguish one substance from another

Question 6

What is a heterogenous mixture?

Answer 6

The parts are noticeably different

Question 7

List examples of a homogenous mixture.

Answer 7

Tea, koolaid, lemonade

Question 8

List examples of a heterogenous mixture.

Answer 8

Sand, salad, mixed nuts

Question 9

What is the density of water?

Answer 9

1.0 g/cm ^3

Question 10

Density

Answer 10

A measure of the amount of matter that occupies a given amount of space

Question 11

What determines if an object will sink or float?

Answer 11

Buoyancy

Question 12

Retain some of their individual substances but the properties of a substance and do not chemically combine

Answer 12

Mixture

Question 13

What it looks like

Answer 13

Physical property

Question 14

An ability to produce a change in the composition of matter

Answer 14

Chemical property

Question 15

Be able to solve for density, volume, and mass

Answer 15

M
D V

D = M/V
M = D x V
V = M/D

Question 16

Know the units for density, volume, and mass

Answer 16

Density - g/cm ^3 or g/mL
Volume - cm ^3 or mL
Mass - g

Question 17

If the density is greater than 1, it

Answer 17

Sinks

Question 18

If the density is less than 1, it

Answer 18

Floats