Vocabulary

Question 1

Scientific method

Answer 1

An organized approach to solve problems

Question 2

Observe

Answer 2

Use your five senses

Question 3

Hypothesis

Answer 3

Educated guess

Question 4

Experiments

Answer 4

Tests hypothesis in order to prove/disprove them.

Question 5

Analysis

Answer 5

Compares the results from the experiment to the original hypothesis

Question 6

Conclusion (theory)

Answer 6

A hypothesis supported by experimental evidence

Question 7

Law

Answer 7

Used to describe a natural phenomenon which has been tested over a long period of time under different conditions

Question 8

Chemistry

Answer 8

The study of matter and the changes it undergoes

Question 9

Matter

Answer 9

Anything that has mass and volume (everything)

Question 10

Mass

Answer 10

The amount of matter in an object (how much “stuff”)

Question 11

Energy

Answer 11

Anything that can do work or produce heat

Question 12

Weight

Answer 12

The force of gravity acting on an object’s mass

Question 13

Solids

Answer 13

Definite shape, definite volume, not compressible, high density

Question 14

Liquid

Answer 14

Indefinite shape, definite volume, not compressible, less dense than solid

Question 15

Gas

Answer 15

Indefinite shape, indefinite volume, are compressible, very low density

Question 16

Matter classified into

Answer 16

Pure substances and mixtures

Question 17

Pure substances

Answer 17

Have uniform and definite composition

Question 18

Elements

Answer 18

Found on the periodic table

Question 19

Compounds

Answer 19

Formed when elements chemically combine, are bonded together

Question 20

Mixtures

Answer 20

Two or more pure substances physically mixed together, no definite composition, are blended

Question 21

Heterogeneous mixtures

Answer 21

Do not have a uniform composition, mixtures can be physically seen and “picked out” of the mixture

Question 22

Homogeneous mixtures

Answer 22

Has a uniform composition, parts of the mixture cannot be picked out

Question 23

Physical properties

Answer 23

Properties that can be measured or observed without changing the identity (or composition) of a substance

Question 24

Chemical properties

Answer 24

Properties that indicate how a substance reacts with other substances

Question 25

Physical changes

Answer 25

Changes in appearance without changing composition

Question 26

Chemical changes

Answer 26

One or more substances react to form new substances with different chemical and physical properties

Question 27

Law of conservation of mass

Answer 27

In any chemical or physical change matter cannot be created or destroyed

Question 28

Measurement

Answer 28

a type of observation

Question 29

Qualitative measurements

Answer 29

descriptive

Question 30

Quantitative measurements

Answer 30

observation made with a measuring instrument and includes both a number and a unit

Question 31

Accuracy

Answer 31

how close a measurement is to the true or accepted value

Question 32

Precision

Answer 32

how close multiple measurements are to each other

Question 33

Scientific notation

Answer 33

has two parts coefficient and power of 10

Question 34

Dimensional analysis

Answer 34

a method used to convert units

Question 35

Base units

Answer 35

mass in grams(g) volume in liters (L) length in meters(m)