Question

1. list three reasons of using standard units in experiments
2. write the si unit of length, mass, and time.
3. what is the si unit of temperature?
4. state the si unit of the amount of substance.
5. convert: 2 kilograms = ____ grams.
6. convert: 50 centimeters = ____ meters.
7. which prefix means \one - thousandth\?
8. which prefix means \one hundred\?
9. write the metric unit for distance that is smaller than a meter

Explanation:

Step1: Recall SI units

The SI unit of length is the meter (m), mass is the kilogram (kg), and time is the second (s).

Step2: Recall SI unit of temperature

The SI unit of temperature is the kelvin (K).

Step3: Recall SI unit of amount of substance

The SI unit of the amount of substance is the mole (mol).

Step4: Convert kilograms to grams

Since 1 kilogram = 1000 grams, then 2 kilograms = 2×1000 = 2000 grams.

Step5: Convert centimeters to meters

Since 1 meter = 100 centimeters, then 50 centimeters = 50÷100 = 0.5 meters.

Step6: Recall prefix for one - thousandth

The prefix "milli -" means one - thousandth.

Step7: Recall prefix for one hundred

The prefix "hecto -" means one hundred.

Step8: Recall metric unit for distance smaller than a meter

Centimeter (cm) is a metric unit for distance smaller than a meter.

Answer:

1. Length: meter (m), Mass: kilogram (kg), Time: second (s)
2. Kelvin (K)
3. Mole (mol)
4. 2000
5. 0.5
6. Milli -
7. Hecto -
8. Centimeter (cm)