Science Midterm

Question 1

What is Persicion

Answer 1

How close together or how consistent your info is

Question 2

What is accuracy

Answer 2

How correct your answer is

Question 3

What is a measurement

Answer 3

Using equipment to find information

Question 4

What is a Calculation

Answer 4

Using a mathematical formula to find information

Question 5

What are the 3 different ways to measure volume?

Answer 5

LWH, Water displacement, set up an equation using density and mass

Question 6

What is the Archimedes Principle

Answer 6

Water Displacement

Question 7

What is the difference between Mass and weight

Answer 7

Mass is the amount of matter in something and Weight is the gravitational pull on an object

Question 8

What substances are pure?

Answer 8

Elements, Compounds

Question 9

What substances are not pure?

Answer 9

Mixtures

Question 10

What substance(s) cannot be broken down

Answer 10

Elements

Question 11

What substance(s) can be broken down/separated

Answer 11

Compounds: Broken Down
Mixtures: Seperated

Question 12

What measurement is used when finding mass

Answer 12

(g) Grams

Question 13

What is a heterogenous mixture?

Answer 13

Something you can tell is made up of multiple different things

Question 14

What is a homogenous mixture?

Answer 14

Something consistent throughout

Question 15

What are the signs of a chemical change?

Answer 15

Color Change
Temp Change (exo/endothermic)
A gas created
A solid created

Question 16

What has unique properties

Answer 16

Elements, compounds (different than the things that makes up the compounds)

Question 17

What is a physical property?

Answer 17

Something that describes how a material looks and feels

Question 18

What is a chemical property?

Answer 18

Something that describes how a material will react with other materials

Question 19

What is an element made up of?

Answer 19

MADE UP OF A SINGLE TYPE OF ATOM

Question 20

What is a compound made up of?

Answer 20

MADE OF TWO OR MORE SPECIFIC CHEMICALLY COMBINED ELEMENTS

Question 21

What is a mixture made up of

Answer 21

Made of 2 or more substances not chemically combined

Question 22

What is the difference between a molecule and a compound?

Answer 22

A molecule is a group of 2 or more atoms that can be the same and compounds have to be diffrent

Question 23

What is the difference between a property and a change?

Answer 23

Property describes something

Question 24

How do atoms in a solid move

Answer 24

Slowly - vibrating

Question 25

How do atoms in a liquid move

Answer 25

Semi-fast - moves past each other

Question 26

How do atoms in a gas move

Answer 26

Fast - bouncing off each other

Question 27

What is it called when a substance goes from a solid to a liquid

Answer 27

Melting

Question 28

What is it called when a substance goes from a liquid to a solid

Answer 28

Freezing

Question 29

What is it called when a solid becomes a gas

Answer 29

Sublimation

Question 30

What is it called when a substance goes from a gas to a solid

Answer 30

Desposition

Question 31

What is it called when a gas becomes a liquid

Answer 31

Condensation

Question 32

What is it called when a liquid becomes a gas

Answer 32

Evaporation

Question 33

What does it mean if something is polar?

Answer 33

Has a positive and a negative

Question 34

Why is water polar?

Answer 34

It has a positive and negative side

Question 35

What is the law of conservation of Mass?

Answer 35

Matter can not be lost or gained

Question 36

What is density?

Answer 36

The amount of matter packed into an object

Question 37

What is Cohesion?

Answer 37

An attraction between molecules of the same substance

Question 38

What is Adhesion?

Answer 38

An attraction between molecules of different substances

Question 39

What happens in a chemical reaction?

Question 40

What causes surface tension