Midterm Review

Question 1

If fire erupts

Answer 1

Notify the teacher

Question 2

Eye protection are worm

Answer 2

Any time chemical, heat, or glassware are used

Question 3

After an experiment all chemical wastes should

Answer 3

Be disposed according to the teachers directions

Question 4

If hurt, first

Answer 4

Tell the teacher

Question 5

Long hair must be

Answer 5

Tied back or kept out of face with hair tie

Question 6

During a lab activity

Answer 6

Loose clothing, dangling jewelry, or sandals SHOULD NOT be worn

Question 7

Horseplay, practical jokes, or pranks in the classroom

Answer 7

Are against the rules

Question 8

Chewing gum, eating and drinking are all

Answer 8

Not permitted

Question 9

Before leaving the science room remember to

Answer 9

Clean your work area and equipment, return all equipment to proper storage and wash your hands with soap and water

Question 10

Scientific method

Answer 10

1) Ask a question
2) Gather Information
3) Create a Hypothesis
4) Perform experiment
5) Analyze data
6) Conclusion

Question 11

Hypothesis

Answer 11

An educated guess or prediction that can be verified through experimentation

Question 12

Independent Variable

Answer 12

The variable controlled by the experimenter. A variable that does not depend on another (x-axis)

Question 13

Dependent Variable

Answer 13

The variable that changes based on the independent variable (y-axis)

Question 14

Constant

Answer 14

A part of the experiment that does not change

Question 15

Control

Answer 15

Something used as a standard of comparison when checking the results of an experiment

Question 16

Mass

Answer 16

Kilogram - kg

Question 17

Length

Answer 17

Meter - m

Question 18

Time

Answer 18

Second - s

Question 19

Temperature

Answer 19

Kelvin - K

Question 20

Amount of substance

Answer 20

Mole - mol

Question 21

Luminous intensity

Answer 21

Candela - cd

Question 22

Volume

Answer 22

The amount of space something takes up

Question 23

Mass

Answer 23

The measure of the quantity of matter a substance contains

Question 24

Density

Answer 24

How packed or dense a material is - relates to mass and volume

Question 25

Density Formula

Answer 25

Density - mass/volume

Question 26

Graph

Answer 26

A graph is a visual representation of data and helps give summary of information

Question 27

What are the three types of graphs?

Answer 27

Line graph Bar graph Pie chart

Question 28

Energy

Answer 28

The ability to do work or cause a change

Question 29

Kinetic Energy

Answer 29

Energy of a moving object; depends on mass and speed

Question 30

Potential Energy

Answer 30

Stored energy

Question 31

Temperature

Answer 31

Measure of the average kinetic energy of the particles

Question 32

Thermal Energy

Answer 32

Heat is thermal energy that flows from higher temperature to lower temperature

Question 33

Calorimeter

Answer 33

A device used to determine the heat released or absorbed in a chemical reaction

Question 34

Endothermic

Answer 34

A process or reaction that absorbs heat

Question 35

Exothermic

Answer 35

A process or reaction that releases heat

Question 36

Matter

Answer 36

Anything made up of atoms and molecules - anything that takes up space

Question 37

Four states of matter

Answer 37

Solids; liquids; gasses; plasma

Question 38

Solid

Answer 38

Attractive forces between particles are strong; particles vibrate and are tightly packed together; definite shape; definite volume

Question 39

Liquid

Answer 39

Attractive forces between particles are weaker than solid but strong enough to cling together; particles can slide past one another; definite volume; indefinite shape

Question 40

Gas

Answer 40

Attractive forces are weak; particles don't cling together; indefinite shape; indefinite volume

Question 41

Changing States

Answer 41

Matter can change from one state to another when thermal energy is released or absorbed

Question 42

Two types of vaporization

Answer 42

Boiling and evaporation

Question 43

Boiling

Answer 43

Rapid, gas bubbles produced throughout a liquid

Question 44

Evaporation

Answer 44

Slow, occurs at the surface of a liquid

Question 45

Heat of vaporization

Answer 45

The energy required to turn a liquid to gas

Question 46

Heat of fusion

Answer 46

The amount of heat the particles must lose to turn into a solid

Question 47

Melting

Answer 47

Solid to liquid

Question 48

Freezing

Answer 48

Liquid to slid

Question 49

Vaporization

Answer 49

Liquid to gas

Question 50

Condensation

Answer 50

Gas to liquid

Question 51

Sublimation

Answer 51

Solid to gas

Question 52

Deposition

Answer 52

Gas to solid

Question 53

Conduction

Answer 53

The transfer of heat by direct contact between two objects

Question 54

Convection

Answer 54

Heat transferred by the movement of molecules within a substance

Question 55

Radiation

Answer 55

Transfer of heat by electromagnetic

Question 56

Insulator

Answer 56

A material which does not allow heat to pass through it easily