Unit 1: Intro to Science, Matter, and Composition

Question 1

What are the steps to the scientific method?

Answer 1

1. State the problem
2. Research the problem
3. Form a hypothesis
4. Test the hypothesis
5. Analyze the data
6. Retest

Question 2

What are units of volume?

Answer 2

Liters

Question 3

What are units of mass?

Answer 3

Grams

Question 4

What are units of distance?

Answer 4

Meters

Question 5

How long would you need to wash out your eye for if a chemical were to splash into it?

Answer 5

10 minutes

Question 6

What is the prefix for 1000?

Answer 6

Kilo

Question 7

What does the prefix Hecto mean?

Answer 7

100

Question 8

What does the prefix Deka mean?

Answer 8

10

Question 9

What is the prefix for 1/10?

Answer 9

Deci

Question 10

What is the prefix for 1/100?

Answer 10

Centi

Question 11

What does the prefix milli mean?

Answer 11

1/1000

Question 12

What prefix means 1,000,000?

Answer 12

Mega

Question 13

What does the prefix giga mean?

Answer 13

1,000,000,000

Question 14

What is a pure substance?

Answer 14

A type of matter with the same composition; not mixed with anything else

Question 15

What is an element?

Answer 15

A substance that cannot be broken down into simpler substances.

Question 16

What is a compound?

Answer 16

A substance with two or more atoms of multiple elements chemically combined.

Question 17

What is matter?

Answer 17

Anything that has mass and takes up space

Question 18

What is energy?

Answer 18

The ability to do work.

Question 19

What are atoms?

Answer 19

The building blocks that make up all matter.

Question 20

What are mixtures?

Answer 20

Substances that contain many kinds of combinations together

Question 21

What is a heterogeneous mixture?

Answer 21

Does not have a definite composition, non uniform, the different compounds can be seen.

Question 22

What is a homogenous mixture?

Answer 22

Does have a definite composition, specific properties, uniform, different components cannot be seen.

Question 23

What is an alloy?

Answer 23

A type of homogenous mixture of two or more elements, at least one of which is a metal.

Question 24

What is a solution?

Answer 24

A type of homogenous mixture when substances completely dissolve

Question 25

What is a suspension mixture?

Answer 25

A type of heterogeneous mixture that separates into layers over time.

Question 26

What is a colloid?

Answer 26

Contains particles intermediate in size, don’t separate into layers.

Question 27

What does endothermic mean?

Answer 27

Phase change that absorbs energy from its surroundings.

Question 28

What does exothermic mean?

Answer 28

Phase change that releases energy to the surroundings.

Question 29

What are some endothermic changes?

Answer 29

Melting
Vaporization
Sublimation

Question 30

What are some exothermic changes?

Answer 30

Freezing
Condensation
Deposition

Question 31

What is deposition?

Answer 31

The phase straight from gas to solid

Question 32

What is sublimation?

Answer 32

The phase change straight from solid to gas.

Question 33

What is pressure?

Answer 33

The result of force distributed over an area.

Question 34

What is Charles’s Law?

Answer 34

The volume occupied by a fixed amount of gas is directly proportional to its absolute temperature if the pressure remains constant.

Equation:
V1/T1=V2/T2

Question 35

What do the Kinetic Theory of Matter and the Theory of Heat state?

Answer 35

That molecules are in constant motion

Question 36

What is Boyle’s Law?

Answer 36

At a fixed temperature, the volume of gas is inversely proportional to the pressure exerted by the gas.

Equation:
P1V1=P2V2

Question 37

What is Combined Gas Law?

Answer 37

The ratio of the product of pressure and volume and the absolute temperature of a gas is equal to a constant

P1V1/T1=P2V2/T2