$$1\ \mu\mathrm{m} = 1 \times 10$$^{-6}$$\ \mathrm{m}$$

$$2.50 \times 10^6$\ \mathrm{mg}$$

$$1.25 \times 10^3$\ \mathrm{mL}$$

Question 1

Which of the following statements is a valid scientific hypothesis?

Accepted Answer

Mountain lion populations will increase if more habitat is protected.

Question 2

Express 205,000 in scientific notation with the correct number of significant figures.

Accepted Answer

$$2.05 	imes 10^5$

Question 3

What is $$8100.0\ \mu\mathrm{m} in $$decimeters (dm)?

Accepted Answer

$$0.08100\ \mathrm{dm}$$

Question 4

Which element is located in period 3, group 16 of the periodic table?

Accepted Answer

Sulfur (S)

Question 5

A student writes $$3.00 	imes 10^4$ for the number 30,000. How many significant figures are in this value?

Accepted Answer

3

Question 6

Which of the following is an example of a quantitative observation?

Accepted Answer

The solution has a mass of $$12.5\ \mathrm{g}.$$

Question 7

Convert $$5.60 	imes 10^3$\ \mathrm{mg} to $$grams.

Accepted Answer

$$5.60\ \mathrm{g}$$

Question 8

Which of the following best describes a control group in a scientific experiment?

Accepted Answer

A group that does not receive the experimental treatment and is used for comparison.

Question 9

If a measurement is recorded as $$0.00450\ \mathrm{kg}$$, how many significant figures does it have?

Accepted Answer

3

Question 10

Which of the following is the correct conversion factor to change micrometers ($$\mu\mathrm{m}) to $$meters ($$\mathrm{m}$$)?

Accepted Answer

$$1\ \mu\mathrm{m} = 1 	imes 10$$^{-6}$$\ \mathrm{m}$$

Question 11

A scientist wants to test if a new fertilizer increases plant growth. Which of the following would be the best hypothesis?

Accepted Answer

If plants are given the new fertilizer, then their growth will increase compared to plants without the fertilizer.

Question 12

Which of the following numbers is written with three significant figures?

Accepted Answer

$$4.50 	imes 10^2$

Question 13

Which of the following is a qualitative observation?

Accepted Answer

The solution turned pink after adding the indicator.

Question 14

Which of the following is the correct scientific notation for the number 0.000320?

Accepted Answer

$$3.20 	imes 10$$^{-4}$$

Question 15

A sample has a mass of $$2.50\ \mathrm{kg}. $$How many milligrams is this?

Accepted Answer

$$2.50 	imes 10^6$\ \mathrm{mg}$$

Question 16

Which of the following is the correct order of metric prefixes from largest to smallest?

Accepted Answer

kilo-, deci-, centi-, milli-

Question 17

Which of the following is a correct statement about the periodic table?

Accepted Answer

Elements in the same group have similar chemical properties.

Question 18

A student measures a length as $$0.0200\ \mathrm{m}. $$How many significant figures are in this measurement?

Accepted Answer

3

Question 19

Which of the following is the correct conversion from $$1.25\ \mathrm{L} to $$milliliters?

Accepted Answer

$$1.25 	imes 10^3$\ \mathrm{mL}$$

GOB Chemistry: Scientific Method, Significant Figures, and Metric Conversions

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