Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemistry > Chapter 2- Scientific Method And Measurements > Flashcards

Chapter 2- Scientific Method And Measurements Flashcards

You may prefer our related Brainscape-certified flashcards:
Periodic Table flashcards Chemistry 101 flashcards AP® Chemistry flashcards Organic Chemistry 101 flashcards
1
Q

Define observation/asking a question

A

Gather existing information knowledge. Ask an informed question

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Define hypothesis

A

Make a prediciton based off observations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Define experiment

A

Design implement experiments to test hypothesis. Should produce results that can be interpreted ambiguously with regards to the validity of the hypothesis. Carefully designed controls identify positive and negative results.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Define data and results

A

Record the results of the experiments.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Define conclusion

A

Summarize and interpret results to determine if hypothesis has been proven true or false. Future hypothesis and experiments can be discussed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Why do scientists need to use standard units of measure?

A

So everyone has the same measurements and uses the same numbers.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is SI?

A

International System of Units

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a base unit?

A

A unit based on something in the real world. Is independent of others.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How many SI base units are there

A

7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the SI base unit for length?

A

Meters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the SI base unit for mass?

A

Kilograms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the SI base unit for time?

A

Seconds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the SI base unit for temperature?

A

Kelvin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the second based on?

A

The frequency of radiation given off an atom.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the meter based on?

A

The distance that light travels in a vacuum.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the kilogram based on?

A

Planck’s constant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is volume?

A

The space occupied by an object.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the SI unit for volume?

What do chemists often use?

A

Cubic meters (m³)

Liter (L)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

One liter is equal to ____ cubic meters (cm³)?

A

1000

20
Q

What is density

A

Amount of mass per unit volume

21
Q

What is the formula for density

A

Mass divided by the volume (m/v)

22
Q

The best unit for density for solids is _____

The best unit for density for liquids is _____

A

g/cm³

g/mL

23
Q

What is Tera?

A

T
1×10¹²

24
Q

What is giga?

A

G
1×10⁹

25
Q

What is mega?

A

M
1×10⁶

26
Q

What is kilo?

A

k
1×10³

27
Q

What is hecto?

A

h
1×10²

28
Q

What is deka?

A

da
1×10¹

29
Q

What is deci

A

d
1×10-¹

30
Q

What is centi

A

c
1×10-²

31
Q

What is milli

A

m
1×10-³

32
Q

What is micro?

A

µ
1×10-⁶

33
Q

What is nano?

A

n
1×10-⁹

34
Q

What is pico?

A

p
1×10-¹²

35
Q

Define accuracy

A

How close measurements are to a target (accepted value)

36
Q

Define precision

A

How close measurements are to one another.

37
Q

What is the equation for percent error?

A

|experimental value - accepted value|
___________________________________ ×100
accepted value

38
Q

What do significant figures indicate?

A

The precision of a measurement

39
Q

List the three rules for which digits are significant.

A
  1. Any non zero numbers
  2. Zeros between non zero numbers.
  3. Any final zeros to the right of a decimal.
40
Q

Do a place holder zeros count as significant figures?

A

NO

41
Q

If the digit to the right of the last significant figure is greater than 5 round ____

A

Up

42
Q

If the digit to the right of the last significant figure is less than 5 round _____

A

Down

43
Q

If the digit to the right of the last significant figure is equal to 5 and the next digit is nonzero round ____

A

Up

44
Q

Round ____ if the last significant figure is odd

A

Up

45
Q

Round _____ if the last significant figure is even

A

Down

46
Q

When adding or subtracting significant figures, count the number of spaces after the ______ for each value. Should match the lowest one

A

Decimal

47
Q

When multiplying or dividing significant figures, count the number of __________ for each value. Should match the lowest one.

A

Significant figures

Chemistry (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions