Objective 2

Question 1

Convert to Scientific Notation:
673.5
- go forward two decimal spaces = positive exponent

Answer 1

6.735 x 10^2

Question 2

Convert to Scientific Notation:
0.034
- go back two decimal spaces = negative exponent

Answer 2

3.4 x 10^-2

Question 3

Precision

Answer 3

Several measurements close together

Question 4

Accuracy

Answer 4

Individual measurements closer to accepted value.

Question 5

Good Accuracy + Good Precision =

Answer 5

Bullseye!

Question 6

Poor Accuracy + Good Precision =

Answer 6

Close together but nowhere close to bullseye…

Question 7

Poor Accuracy + Poor Precision

Answer 7

All over the place!

Question 8

How do you measure a liquid in a graduated cylinder when given 10 mL markings?

Answer 8

• Always look at the lowest point of where the substance touches a line.
  Ex. 24.1 mL

Question 9

How many sigfigs?

0.02050

Answer 9

4
- leading zeros don’t count & only zeros that are sandwiched between numbers count!

Question 10

What is (6.5-6.280) / 4.53 with the right amount of sigfigs?

Answer 10

0.05
- use the least amount of sigfigs when rounding!

Question 11

What is (34.123 + 6.50) / (98.7654 - 9.138) with correct amount of sigfigs?

Answer 11

0.4532

Question 12

What is 2.71 m to km?

Answer 12

0.00271 km

Question 13

What is 0.00807 m to mn

Answer 13

8070000 mn

Question 14

What is 12.1 m to cm?

Answer 14

1210 cm

Question 15

23 mg to g?

Answer 15

0.023 g

Question 16

Mega (M) =

Answer 16

1,000,000 –> Mm = 1,000,000 m

Question 17

Centi (c)

Answer 17

1m –> 100 cm