Question

quiz #1 - scientific method and states of matter
part 1 – multiple choice

1. what is the proper name for the system of measurement used throughout most of the world that is also referred to as the metric system?

a. the imperial system
b. the si (international system)
c. the fahrenheit system
d. the american system

1. which of the following would be a reasonable height for an adult human?

a. 2 mm
b. 2 cm
c. 2 m
d. 2 km

1. which prefix denotes a 1000 of a base unit?

a. kilo-
b. deci-
c. centi-
d. milli-

1. what is the si base unit for length?

a. foot
b. meter
c. gram
d. pound

1. what is the si base unit for mass?

a. foot
b. meter
c. gram
d. pound

1. the liter (l) is an si base unit that is a measurement of ...

a. density
b. length
c. mass
d. volume

1. a sprinter wins a race by only 34.2 milliseconds. how long is that in seconds?

a. 342,000 s
b. 342 s
c. 0.0342 s
d. 0.0000342 s

1. which of the following measurements is the largest? (hint: convert them to a common unit then compare)

a. 24000 centimeters
b. 240 meters
c. 2.4 kilometers
d. 0.24 decimeters

Explanation:

Step1: Solve Q1 (Metric system name)

The metric system's official global name is the International System of Units (SI).

Step2: Solve Q2 (Reasonable adult height)

2 mm, 2 cm are too small; 2 km is far too large. 2 m is a reasonable adult human height.

Step3: Solve Q3 (Prefix for 1000x base unit)

The prefix "Kilo-" denotes a factor of 1000 relative to a base unit.

Step4: Solve Q4 (SI base unit for length)

The meter is the defined SI base unit for length.

Step5: Solve Q5 (SI base unit for mass)

The gram is the defined SI base unit for mass (kilogram is the standard, but gram is the base unit here).

Step6: Solve Q6 (Liter measures what quantity)

A liter is a unit used to measure volume.

Step7: Solve Q7 (Convert milliseconds to seconds)

Since 1 millisecond = $\frac{1}{1000}$ seconds, calculate:
$34.2 \times \frac{1}{1000} = 0.0342$ s

Step8: Solve Q8 (Largest measurement)

Convert all to meters:

• a. $24000\ \text{cm} = 24000 \times 0.01 = 240\ \text{m}$
• b. $240\ \text{m}$
• c. $2.4\ \text{km} = 2.4 \times 1000 = 2400\ \text{m}$
• d. $0.24\ \text{dm} = 0.24 \times 0.1 = 0.024\ \text{m}$

2400 m is the largest.

Answer:

1. b. The SI (international system)
2. c. 2 m
3. a. Kilo-
4. b. Meter
5. c. Gram
6. d. volume
7. c. 0.0342 s
8. c. 2.4 kilometers