Density worksheet 1 & 2 - Free Printable

Density Worksheet Solution

#### Questions:
1. What is the density of water?
- The density of water is 1.0 g/mL (or 1.0 g/cm³ at 4°C).

2. In an oil spill, the oil seems to float on top of the water. Does oil or water have the lower density?
- Oil has the lower density compared to water. This is why oil floats on top of water.

3. In an oil spill, is the danger greater to birds and marine mammals than it is to fish and other organisms that live on the ocean bottom? Why?
- Yes, the danger is greater to birds and marine mammals because:
- Birds and marine mammals are more likely to come into direct contact with the oil floating on the surface.
- Oil can coat their feathers or fur, impairing their ability to insulate themselves and causing hypothermia.
- They may also ingest the oil while trying to clean themselves or hunt for food.
- Fish and other bottom-dwelling organisms are less directly exposed to the surface oil but may still be affected indirectly through contamination of their food sources.

4. How is the density of oil an advantage in the cleanup?
- Since oil has a lower density than water, it floats on the surface. This makes it easier to contain and remove using methods such as skimming, booms, and absorbent materials. If oil were denser than water, it would sink, making cleanup much more difficult.

5. Corn syrup sinks when poured in water. Does water or corn syrup have the higher density?
- Corn syrup has the higher density compared to water. This is why it sinks when poured into water.

6. Why would an oil spill be an even greater disaster if the density of oil were the same as that of corn syrup?
- If the density of oil were the same as corn syrup (which is higher than water), the oil would sink instead of floating on the surface. This would make the cleanup much more challenging because:
- Sinking oil would contaminate deeper layers of the ocean, affecting a wider range of marine life.
- It would be harder to contain and remove using surface-based cleanup methods.
- The environmental impact would be more widespread and long-lasting.

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#### Problems:

1. A block of aluminum has a volume of 15.0 mL and a mass of 40.5 g. What is its density?
- Formula: Density = Mass / Volume
- Given:
- Mass = 40.5 g
- Volume = 15.0 mL
- Calculation:
\[
\text{Density} = \frac{\text{Mass}}{\text{Volume}} = \frac{40.5 \, \text{g}}{15.0 \, \text{mL}} = 2.70 \, \text{g/mL}
\]
- Answer: The density of aluminum is 2.70 g/mL.

2. Mercury metal is poured into a graduated cylinder that holds exactly 22.5 mL. The mercury used to fill the cylinder is 306.0 g. What is the density of mercury?
- Formula: Density = Mass / Volume
- Given:
- Mass = 306.0 g
- Volume = 22.5 mL
- Calculation:
\[
\text{Density} = \frac{\text{Mass}}{\text{Volume}} = \frac{306.0 \, \text{g}}{22.5 \, \text{mL}} = 13.6 \, \text{g/mL}
\]
- Answer: The density of mercury is 13.6 g/mL.

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Final Answers:

1. Density of water: 1.0 g/mL
2. Oil has the lower density.
3. Danger is greater to birds and marine mammals because they are more directly exposed to surface oil.
4. The low density of oil allows it to float, making it easier to contain and remove.
5. Corn syrup has the higher density.
6. If oil had the same density as corn syrup, it would sink, making cleanup much more difficult and increasing the environmental impact.
7. Density of aluminum: 2.70 g/mL
8. Density of mercury: 13.6 g/mL

Boxed Final Answers:
\[
\boxed{1.0 \, \text{g/mL}, \text{Oil}, \text{Birds and mammals}, \text{Floats}, \text{Corn syrup}, \text{Sinking oil}, 2.70 \, \text{g/mL}, 13.6 \, \text{g/mL}}
\]