Question

1. list three benefits 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:

1. Standard units allow for reproducibility of experiments, enable easy communication of results between scientists globally, and provide accuracy and consistency in measurements.
2. The SI unit of length is the meter (m), of mass is the kilogram (kg), and of time is the second (s).
3. The SI unit of temperature is the kelvin (K).
4. The SI unit of the amount of substance is the mole (mol).
5. Since 1 kilogram = 1000 grams, 2 kilograms = 2×1000 = 2000 grams.
6. Since 1 meter = 100 centimeters, 50 centimeters = 50÷100 = 0.5 meters.
7. The prefix "milli -" means one - thousandth.
8. The prefix "hecto -" means one hundred.
9. A centimeter (cm) is a metric unit for distance that is smaller than a meter.

Answer:

1. Reproducibility, easy communication, accuracy and consistency.
2. Meter (m), Kilogram (kg), Second (s)
3. Kelvin (K)
4. Mole (mol)
5. 2000
6. 0.5
7. Milli -
8. Hecto -
9. Centimeter (cm)