Exams - Preperation

Question 1

What is the Independent variable?

Answer 1

What is purposefully being changed? What is the cause?

Question 2

What is the dependent variable?

Answer 2

What is being measured? What is the effect?

Question 3

What is the control group?

Answer 3

The normal group being used for comparison

Question 4

What is the experimental group?

Answer 4

The group that is being tested and purposefully changed

Question 5

What is the constant?

Answer 5

Factors that do not change in the experiment

Question 6

What does qualitive mean?

Answer 6

Descriptive data

Question 7

What does quantitative mean?

Answer 7

Numerical data

Question 8

What is accuracy?

Answer 8

The degree to which the experimental result agrees with the accepted value

Question 9

What is precision?

Answer 9

The degree to which measurements agree with each other

Question 10

What is an observation?

Answer 10

Objective; based on the 5 senses not an opinion

Question 11

What is an inference?

Answer 11

Subjective; a guess about an observation

Question 12

What is a hypothesis?

Answer 12

A testable prediction that attempts to write an answer

Question 13

What is the atomic number?

Answer 13

Tells the number of protons in an element

Question 14

What is an isotope?

Answer 14

Atoms of the same element with a different number of neutrons

Question 15

What is the hyphen form?

Answer 15

The name of he element hyphen the mass number

Question 16

What is the nuclear form?

Answer 16

The name of the element with the mass number in the top left

Question 17

What is the mass number?

Answer 17

Tells the number of protons and neutrons in an element

Question 18

What is an atomic mass?

Answer 18

Weighted average of all the different versions of an element

Question 19

What are metalloids?

Answer 19

• solids
• semi-conductors
• physical properties like metals
• chemical properties like nonmetals

Question 20

What are groups?

Answer 20

The vertical columns on the periodic table

Question 21

What are periods?

Answer 21

The horizontal rows on the periodic table

Question 22

What are nonmetals?

Answer 22

• Gases, or dull brittle solids
• poor conductors
• right of the metalloids

Question 23

What are metals?

Answer 23

• shiny, silvery solids
• good conductors if heat and electricity
• malleable and ductile
• located to the left of the malloids

Question 24

What is matter?

Answer 24

Anything that takes up space and has mass

Question 25

What are substances?

Answer 25

All particles in matter are identical (fixed composition)

Question 26

What is an element?

Answer 26

Simplest form of matter from which more complex substances are made

Question 27

What are compounds?

Answer 27

two or more elements chemically combined in a fixed proportion and can only be broken down by chemical reactions

Question 28

What are mixtures?

Answer 28

Two or more substances physically combined

Question 29

What are colloids?

Answer 29

small particles remain dispersed evenly throughout mixture | Suspension- larger particles that appear uniformly distributed but will settle out over time or if not being mixed

Question 30

What is the Tyndall effect?

Answer 30

The scattering of light by a mixture

Question 31

What are homogeneous mixtures?

Answer 31

Compounds are evenly distributed on a microscopic level

Question 32

What are heterogeneous mixtures?

Answer 32

Substances in the mixture are evenly spread out

Question 33

What is a physical property?

Answer 33

The substance does not change

Question 34

What is a chemical property?

Answer 34

The substance does not change

Question 35

What is a physical change?

Answer 35

Only affects somethings physical properties

Question 36

What is a chemical change?

Answer 36

Only affects somethings chemical properties

Question 37

What is the law if conservation of matter?

Answer 37

Matter cannot be created or destroyed

Question 38

What is density?

Answer 38

A measure or compactness or consistency of a material

Question 39

What is temperature?

Answer 39

Measure of the average kinetic energy of particles in an object

Question 40

What is thermal energy?

Answer 40

The sum of the kinetic energy and potential energ it particles in an object

Question 41

What is solubility?

Answer 41

Maximum amount of solute that can dissolve in a certain amount of solvent at a given temp

Question 42

What group are alkali metals in?

Answer 42

Group 1

Question 43

What group are alkaline earth metals in?

Answer 43

Group 2

Question 44

What group are rare earth metals in?

Answer 44

Group 3

Question 45

What group are the transition metals in?

Answer 45

Group 3-12

Question 46

What group are halogens in?

Answer 46

Group 17

Question 47

What group are noble gases in?

Answer 47

Group 18