Question

1. experimentation involves the testing of...

a) variables
c) laws
b) conversions
d) conclusions

1. the metric unit that would best measure the length of your thumb is...

a) m
c) cm
b) in
d) mm

1. an experiment is said to be \controlled\ when...

a) government policies specify the nature of the experiment
b) the study includes the testing of a variable with a known and accepted result
c) there are no dangerous substances used in the experiment
d) two or more scientists give their approval to the design of the experiment.

1. convert 768,000mg into grams.

a) 384g
c) 384,000g
b) 0.768g
d) 768g

1. an example of a derived quantity is...

a) electric current
c) length
b) time
d) pressure

1. what will never be done with excess chemicals during an experiment?

a) dump down the drain
c) place back in original container
b) place in garbage
d) ask your instructor

1. how many significant digits are contained in the number 0.0046?

a) 4
c) 3
b) 5
d) 2

1. how many significant digits are contained in the number 65.500?

a) 5
c) 4
b) 3
d) 2

Explanation:

Step1: Recall the metric conversion

We know that \(1g = 1000mg\). To convert milligrams to grams, we use the formula \(g=\frac{mg}{1000}\).

Step2: Substitute the value

Given \(mg = 768000\), then \(g=\frac{768000}{1000}\).

Step3: Calculate the result

\(\frac{768000}{1000}=768\)

Answer:

d) \(768g\)