Advanced Chemistry Unit 1 (Mr. Lind)

SCIENCE & CHEMISTRY

100

Science...

a) asks questions like "why?" and "how?"

b) literally means "knowledge"

c) is a systematic approach to problem solving

d) all are true of science

d - all are true of science

200

Define "chemistry" without using the word "chemical(s)" in your answer.

Chemistry is the study of ___ and ___.

matter and change

substances and changes

300

The first step of the scientific method is to...

a) observe things in nature

b) define or identify a problem

c) ask a question

d) all are true of the first step in science

d - all are true of the first step in science

400

This type of data collected during an experiment does NOT involve numbers.

Qualitative

500

What is the only letter in the alphabet that does not appear on the Periodic table?

J

METRIC SYSTEM

100

Convert 5 grams (g) to milligrams (mg)

5,000 mg

200

Convert 3 deciliters (dL) to Dekaliters (DL)

0.03 DL

300

Convert 5 Terabytes (TB) to Megabytes (MB)

5x10⁶ MB

or

5,000,000 MB

400

Convert 7 m³ to mm³

7x10⁹ mm

or

7,000,000,000 mm

500

Water's density is 1.0 g/cm³

What is water's density in kg/m³ ?

1,000 kg/m³

SCIENTIFIC NOTATION

100

Put the Sun's diameter in scientific notation

1,400,000,000 m

1.4x10⁹ m

200

Put the size of a hydrogen atom (cm) into standard notation 

1x10^-8 cm

0.000 000 01 cm

300

Multiply:

2x10⁴ x 4x10²

8x10⁶

or

8,000,000

400

5x10⁹ / 1x10⁵

5x10⁴

or

50,000

500

The volume of a sphere = 4/3(3.14)r³.  A dust grain is approximated as a sphere with a radius of 2 x 10⁻⁶ meters. If the density of the silicon dioxide it's made of is 3300 kg/m³, find the mass of one dust grain.

1.1 x 10⁻¹³ kg

SIG FIGS

100

Are leading zeros ever significant?

ex: 0.000 3

No!

200

Are "buried" or "captive" zeros significant?

ex: 50,005 m

Yes!

300

When are trailing zeros significant?

Only when a decimal is present!

400

How many significant figures?

0.000 300 300 g

0.000 300 300 g

(6 - everything from the first 3 to the right)

500

Round your answer with correct sig figs:

3.173 g + 1.1 g

4.3 g 

*When adding and subtracting, round to the lesser of the decimal places in the numbers you're adding or subtracting

POTPOURRI

100

LIST QUESTION!  100 PTS FOR EACH CORRECT!

What are the 7 "fundamental measurements?"

Length, mass, time, temperature, amount, electric current, luminous intensity

200

The 2nd step of the scientific method is to make your most educated guess to attempt to answer your scientific question.  This "guess" is called a/an __.

hypothesis

300

A group of students measure and calculate gold's density three times, and the results are as follows:

15.2 g/mL, 15.1 g/mL, and 15.3 g/mL

Gold's actual density is 19.3 g/mL.

Were the groups measurements accurate?  Precise?

They were precise, but not accurate

400

Give 2 examples of "derived" measurements.

(there are LOTS to choose from)

examples: speed (distance/time), area (length x width), volume (l x w x h), density, (mass/volume), force (mass x velocity)

500

Multiply and round to correct sig figs:

3.3 cm x 1.50 cm

5.0 cm²

*when multiplying or dividing, the answer must be rounded to the same number of sig figs as the lesser or least of the numbers you are multiplying or dividing