Chemistry Test

conversions

change units of measurement

8.264 g - 7.8 g=?

0.5g

Round the following to 2 decimal places; 79.2588

79.26

How do you write 8.317 x 10^6 in standard notation?

8, 317, 000

Control

standard for comparison

Mass=

the amount if matter in an object (kg)

Express the following in standard notation: 8.025 x 10-8

.00000008025

1.6m to ? km

.0016 km

109 dm to ? hm

.109 hm

Convert to standard notation: 2.4 x 10-3

0.0024

Round the following to 2 decimal places; 0.03062

0.03

How do you write 1001 in scientific notation?

1.001 x 103

Express the following in scientific notation: 10,030,400,000

1.00304 x 1010

1.6 km + 1.62 m +1200 cm= ?

1.2 x 10^3

Round the following to 1 decimal place; 1.3511

1.4

The rule of scientific notation is to write all exponents with a base of?

10

Round the following numbers to 4 sig figs: 112.511

112.5

1.39 kg to ? g

1390 g

How many Significant Figures in the number below? 4,500

2

Round the following to 1 decimal place; 2.473

2.5

Round the following numbers to 4 sig figs: 21.860051

21.86

Round the following to 2 decimal places; 22.494

22.50

6.201cm + 7.4cm + 0.68cm+ 12.0cm=?

26.3cm

circumference

2πr

How many Significant Figures in the number below? 0.456

3

How many Significant Figures in the number below? 4,560

3

How many Significant Figures in the number below? 406,000

3

1.31cm x 2.3cm=?

3.0cm^2

Round the following numbers to 4 sig figs: 3.682417

3.682

0.00037 gm to ? km

370 km

Round the following numbers to 4 sig figs: 375.6523

375.7

10.4168m - 6.0 m=?

4.4 m

Express the following in scientific notation: .000457

4.57 x 10-4

How would you write 4.3756 x 104 in standard form?

43,756

Round the following numbers to 4 sig figs: 45.4673

45.47

55dm to ? m

5.5 dm

Round the following to 1 decimal place; 5.687524

5.7

5.9 km to ? cm

590,000 cm

How many Significant Figures in the number below? 400,506

6

The International System of Units only includes _____ base units

7

Round the following to 1 decimal place; 7.555

7.6

20.2 cm / 7.41 s=?

= 2.73 cm/s

scientific notation

A mathematical method of writing numbers using powers of ten.

constant

A value that does not change

Area of a rectangle

A=lw

Area of a circle

A=πr²

Hypothesis

An educated guess

Weight

Gravitational pull on an object (N)

Data

Information collected during an experiment.

Inference

It is our interpretation of the facts or prior knowledge

Temperature

Kelvin (K)

dependent variable

The data collected as a result of the change in the independent variable.

independent variable

The variable that is changed in an experiment by the experimenter

Volume of a sphere

V=4/3πr³

Volume of a rectangular solid

V=lwh

pie chart

a chart that shows the relationship of a part to a whole

Measurment

a comparison between an unknown quantity and a standard

Line graph

a graph that shows continuous data over a period of time

T-chart

a graph that shows data collected from 2 variables

Bar graph

a graph used to compare different groups, or to track change over time.

Scatter Plot Graph

a graph used to show relationships between independent variable and dependent variables.

Scientific Method

a series of steps followed to solve problems

perimenter

add all sides

electric current

ampere, A

luminous intensity

candela (cd)

Accuracy

how close a measurement is to the true value

Mass

kilogram (kg)

Length

meter (m)

Amount of substance

mole (mol)

time

second (s)

Volume =

the amount of space an object take up

Percision

the exactness of a measurement

Conclsuion

the final step in the scientific method

For multiplication, just make sure the answer has the same sig figs as _____.

your least precise measurement