Density Review
1. What is the density of CO gas if 0.196 g occupies a volume of 100 ml?
2. A block of wood 3 cm on each side has a mass of 27 g. What is the density of the block? (Hint, don’t forget to find the volume of the wood.)
3. An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 2 ml. The height of the water rose to 7 ml. If the mass of the stone was 25 g, what was its density?
4. A 10.0 cm3 sample of copper has a mass of 89.6 g. What is the density of copper?
5. Silver has a density of 10.5 grams/cm3 and gold has a density of
19.3 g/cm3. Which would have the greater mass, 5cm3 of silver or 5cm3 of gold?
6. Five mL of ethanol has a mass of 3.9 g, and 5.0 mL of benzene has a mass of 44 g. Which liquid is denser?
7. A sample of iron has the same dimensions of 2 cm x 3 cm x 2 cm. If the mass of this rectangular-shaped object is 94 g, what is the density of iron?
Quantitative vs. Qualitative
1. It is light green in color.
2. It taste sour.
3. One leaf is 9 cm long.
4. It makes a loud pop sound.
5. The mass of the computer is 1 1/2 kg.
6. It smells sweet.
7. The temperature of the room increases by 8 degrees C.
8. It gets darker over a period of time.
9. The flower clusters in 3 blooms.
10. Feels very rough.
11. The plant is short.
12. Leaves are stiff.
13. The veins are 3 mm wide.
Write a qualitative example:
Write a quantitative example:
What type of observation do you think is more scientific and why?
SI system of Measurement Review
What type of measurement is indicated by each of the following units? Choices are in the last column.
1. g/mL
2. s
3. km
4. g
5. cm3
6. mm
7. mg
8. L
9. g/cm3
density
length
mass
time
volume
For each of the following commonly used measurements, indicate its symbol. Use the symbols to complete the following sentences with the most appropriate unit. Units may be used more than once or not at all.
_____ milliliter
_____ kilogram
_____ meter
_____ milligram
_____ millimeter
_____ liter
_____ kilometer
_____ second
_____ centimeter
_____ gram
1. Colas may be purchased in two or three _____ bottles.
2. The mass of a bowling ball is 7.25 _____.
3. The length of the common housefly is about 1 _____.
4. The mass of a paperclip is about 1 _____.
5. One teaspoon of cough syrup has a volume of 5 _____.
6. Stand with your arms raised out to your side. The distance from your nose to your outstretched fingers is about 1 _____.
7. On a statistical basis, smoking a single cigarette lowers your life expectancy by 642,000 _____, or 10.7 minutes.
Convert the following metric measurements:
1000 mg = _____ g 198g = _____ Kg 8 mm = _____ cm
160 cm = _____ mm 75 mL = _____ L 6.3 cm = _____ mm
109 g = _____ Kg 50 cm = _____ m 5.6 m = _____ cm
250 m = _____ Km 5 L = _____mL 26,000 cm = _____ m
14 Km = _____ m 16 cm = _____mm 56,500 mm = _____ Km
1 L = _____ mL 65 g = _____ mg 27.5 mg = _____ g
480 cm = _____ m 2500 m = _____ Km 923 cm = _____ m
27 g = _____ kg 355 mL = _____ L 0.025 Km = _____ cm