PSC1515 Chapter 1 Practice Problems

- What is the step in the scientific process in
which a prediction is made based on observations?

- What is the step in the scientific process in
which an explanation given after experiments are performed for what is observed
but which can later be proven to be incorrect?

- What is the last step in the scientific process
after many scientists have obtained the same results?

- What is the basic unit for each of the following
in the metric system?

- length
- mass
- time
- volume

- How many grams are there in 1 kg?
- How many milligrams (mg) are there in 1 gram?
- How many micrograms are there in 1 gram?
- What unit of volume is the same as 1 dm
^{3}? - What unit of volume is the same as 1 cm
^{3}? - What is the volume of a prism with the following
dimensions:

l = 56 cm
w = 47 cm h = 15 cm.

- What is the area of a rectangle which is 75
inches long and 4 inches wide?

- What is the density of a metallic object which
has a mass of 56 g and a volume of 4 cm
^{3}?

- What is the volume of a liquid that has a mass
of 250 g and a density of .88 g/mL?

- What is the mass of 55.3 L of water?

- What are the symbols for each of the following?
- mass e.
proportional
- volume f. temperature
- time g. change
- density

16. If P = __k__ then is P directly or inversely
proportional to V?

V

17. If F = m x a then is F directly or inversely
proportional to a as long as m

is constant?

Answers:

1. hypothesis 2. theory 3. scientific
law 4. m, kg, s, L 5.
1000 g 6. 1000 mg 7. 1,000,000

8. liter (L) 9. milliliter (mL) 10. 39,480 cm^{3} 11. 300 in^{2} 12.
14 g/mL 13. 284 mL 14. 55.3
kg

15. m, V, t, r, a, T,
D 16. inversely 17.
directly

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