R.1-R.9

Question 1

What is matter?

Answer 1

anything that has mass and occupies space

Question 2

What are the three states of matter?

Answer 2

solid, liquid, gas

Question 3

What are the properties of solids?

Answer 3

solids have a fixed volume and shape

Question 4

What are the properties of liquids?

Answer 4

liquids have a fixed volume but not shape

Question 5

What are the properties of gases?

Answer 5

gases don’t have a fixed volume nor a fixed shape

Question 6

What is a property of elements?

Answer 6

can’t be broken down into simpler substances

Question 7

What is a property of compounds?

Answer 7

can be broken down into elements via chemical reactions

Question 8

What are mixtures?

Answer 8

mixtures have a variable composition (consists of different substances)

Question 9

What is a homogenous mixture?

Answer 9

a homogeneous mixture has visually indistinguishable components (ex. Gatorade, air, wine, steel)

Question 10

What is a heterogeneous mixture?

Answer 10

a heterogeneous mixture has visually distinguishable components (ex. A bowl of soup)

Question 11

What are physical changes?

Answer 11

physical changes change the form of the substance and NOT the chemical composition

Question 12

What are chemical changes?

Answer 12

chemical changes change one substance into a new substance with different properties and composition

Question 13

Is saltwater a mixture, compound, or element?

Answer 13

Mixture (has more than just one compound present)

Question 14

Is helium gas a mixture, compound, or element?

Answer 14

element

Question 15

Is table sugar a mixture, compound, or element?

Answer 15

compound (uniformly one compound)

Question 16

What is the equation for density?

Answer 16

density (g/ml) = mass (g) / volume (mL)

Question 17

Density is an _____ property and doesn’t ______

Answer 17

density is an inartistic property and doesn’t change the amount of matter present

Question 18

What is the law of conservation of energy?

Answer 18

energy can be converted from one form to another form but can’t be created nor destroyed

Question 19

What is energy?

Answer 19

the capacity to do work or produce heat

Question 20

What is heat?

Answer 20

energy that flows between one object to another because of temperature differences

Question 21

What is work?

Answer 21

force acting of a distance

Question 22

What is potential energy?

Answer 22

energy due to position or composition

Question 23

What is kinetic energy?

Answer 23

energy due to the motion of an object

Question 24

What charges attract?

Answer 24

positive and negative

Question 25

The greater the distance there is between charges, the more _____ energy there is

Answer 25

potential

Question 26

What is the meaning of endothermic?

Answer 26

reactions absorbing heat (ex. Ice melting)

Question 27

What is the meaning of exothermic?

Answer 27

reactions releasing heat

Question 28

What is a qualitative observation?

Answer 28

doesn't include numbers, something like smell and tate

Question 29

What is a quantitative observation?

Answer 29

numbers

Question 30

The prefix mega- in number form and interval notation is....

Answer 30

1,000,000 or 10^6

Question 31

The prefix kilo- in number form and interval notation is....

Answer 31

1,000 or 10^3

Question 32

The prefix hecto- in number form and interval notation is....

Answer 32

100 or 10^2

Question 33

The prefix deka- in number form and interval notation is....

Answer 33

10 or 10^1

Question 34

The prefix deci- in number form and interval notation is....

Answer 34

0.1 or 10^-1

Question 35

The prefix centi- in number form and interval notation is...

Answer 35

0.01 or 10^-2

Question 36

The prefix milli- in number form and interval notation is....

Answer 36

0.001 or 10^-3

Question 37

The prefix micro- in number form and interval notation is....

Answer 37

0.000001 or 10^-6

Question 38

The prefix nano- in number form and interval notation is....

Answer 38

0.000000001 or 10^-9

Question 39

What are the three systems for temperature?

Answer 39

Fahrenheit, Celsius, Kelvin

Question 40

____ C = _____ K

Answer 40

1 C = 1 K, same amount of changes in each scale

Question 41

What is the equation to convert from Fahrenheit to Celsius?

Answer 41

(Tf-32)(5C/9F)

Question 42

What is the equation to convert from Celcius to Fahrenheit?

Answer 42

Tc(9F/5C)+32

Question 43

What is the equation to convert from Celcius to Kelvin?

Answer 43

Tc + 273.15

Question 44

What is the equation to convert from Kelvin to Celcius?

Answer 44

Tk - 273.15

Question 45

What is precision?

Answer 45

agreement of serval measurements, how close are the numbers to each other (ex. Darts shot at one location that isn't bullseye)

Question 46

What is accuracy?

Answer 46

how close the measurement is true to the actual measurement/value

Question 47

What is random error?

Answer 47

random error is caused by any factors which vary from one measurement to another (ex. Measuring height with different postures)

Question 48

What is systematic error?

Answer 48

repeated error in the same direction each time (ex. An instrument that isn't calibrated correctly)

Question 49

For significant figures, nonzero integers _____ count

Answer 49

ALWAYS

Question 50

How many significant figures are there in the number 234?

Answer 50

3

Question 51

Leading zeros in significant figures are _______

Answer 51

insignificant

Question 52

How many significant figures are there in the number 00.23

Answer 52

2

Question 53

Trailing zeros only count if there are ______

Answer 53

decimals

Question 54

How many significant figures are there in the number 2.300?

Answer 54

4

Question 55

Exact numbers (no certainty) have an _____ amount of significant figures.

Answer 55

infinite

Question 56

If there are 32 buttons on a calculator, how many sig. Figs. Are there?

Answer 56

an infinite amount

Question 57

For multiplying/dividing significant figures, the number of sig figs in the result must be the same as the _______

Answer 57

least precise measurement aka the number with the least amount of sig figs being multiplied

Question 58

For adding/subtracting, the number of ______ in the result must be the same as the ______

Answer 58

For adding/subtracting, the number of decimal places in the result must be the same as the least precise measurements

Question 59

What does the unit factor method allow us to do?

Answer 59

the unit factor method allows us to convert one unit to another (1ft = 12in)