Monday, 8 September 2014

DENSITY



1.What instrument would you use to measure each of the following:

(a) temperature ……………………………………           (b) mass ………………………………….

(c) liquid volume ……………………………………         (d) time …………………………………….

(e) your handspan  …………………………………………………..

(f) thickness of your little finger ……………………………………………………….

2. What would be an accurate way of finding the thickness of one sheet of a pile of sheets of paper if all you had to use to measure it was a ruler?

…………………………………………………………………………………………………………..

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3. Which instruments would you need to measure:

(a) the density of a liquid ………………………..………………………………………………….

(b) the density of a regularly shaped solid …………………………………………………………

(c) the speed of a marble rolling down a slope ……………………………………………………

4. What are the SI units for:

(a) mass ……………………………………………                (b) volume ……………………………..

(c) density ………………………………………….             (d) time …………………………………..

5. Which would be better for measuring the length of your lab? A metre ruler graduated in mm or a 10 m measuring tape graduated in 0.5 cm? Explain your answer. (Assume the lab is about 9.5 m long)

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6. For an object to float in water its density must be ……………………………………… the density of water.

7. Which of the following will float on olive oil? (Density of olive oil = 900 kg/m3)

Substance
Density (kg/m3)
Substance
Density (kg/m3)
Water
1000
Cork
250
Oak
700
Alcohol
800

……………………………………………………………………………………………………………

8. Which is denser, salty water or fresh water? …………………………………………………