Earth Science Questions

Topics: Earth, Sun, Oxygen Pages: 11 (2844 words) Published: December 27, 2012
Tabulate the characteristics of water

• Water appears in nature in all three common states of matter (solid, liquid, and gas) • Water is tasteless and odorless
• Water is a good polar solvent and is widely referred to as universal solvent • Water covers 71% of the Earth's surface
• Water has a high specific heat
• Water has a high heat of vaporization.
• Water's greatest density occurs at 4C

2. Construct a graph showing water distribution

Earth’s Water Distribution

3. As future teachers what will you do to prevent or control water pollution?
Since my specialization is teaching, the least thing I could do is to educate my future pupils and the people around me about the effects of water pollution and what we can do about it even by ourselves. I would teach them what changes water pollution has brought to our environment.

4. Draw waves and label the parts

5. Do waves that are close together have a longer or shorter wavelength than waves that are far apart? Waves that are close together have shorter wavelength but higher frequencies. While those waves that are far apart have longer wavelength have lower frequencies.

6. What happens to the wavelength as waves approach shores? The wavelength decrease and the height increases. The pressure also eases down.

7. What force causes the tides to occur on Earth’s surface? Tides on Earth’s surface are caused by the moon’s gravitational pull as well as the Sun’s gravitational pull. However, the Sun’s gravity is much weaker on Earth’s surface than the moon’s gravity since the Moon is much closer to Earth than the Sun.

8. Describe one factor that affects the height of the tides in a particular area.

One factor that affects the heights of tides in a particular area is because of the nature of the sea floor, and how deep or shallow the seas or ocean. Sometimes landmasses can also block the path of the tide, altering the times at which the tides occur.

9. Why would it be helpful to know the times of the tides?
It is necessary to know the times of the tides, for instance, when visiting the beach to go for swimming. From scientists, navy, mariners, to oceanographers can help predict tsunamis.

10. Can we use the energy of the waves to create electricity? Explain.
Waves are a powerful source of energy. The problem is that it's not easy to harness this energy and convert it into electricity in large amounts. Thus, wave power stations are rare.

11. How is an area’s hot, dry climate related to the Dead Sea’s high salinity?
A hot, dry climate is related to the Dead Sea’s high salinity in terms of evaporation and temperature.

12. If this oil spilled on the ocean’s surface, would it sink or float? Explain your answer in terms of density.
When oil and water is mixed, the tendency of the oil is to float above the water. It happens because the density of the oil is much lighter that the density of water.

13. Newly formed volcanic islands have a rich supply of minerals. Explain. They were formed from molten rock from the ocean and cooled to form the island. Rocks often contain minerals, thus as the rock erodes and soil covers the island it contains the minerals that were making up part of the rock.

14. Give examples of the organisms that can live on the edge of the ocean. Provide explanations.
Some of the most well-known are crabs, shrimp, starfish, scallops and sea urchins. Other species, such as different types of cod, tuna live on the edge of the ocean for feeding and habitation and they have also adapted to the specific water climate.

15. Differentiate estuarine from salt marshes and mangrove forest.
A salt marsh is a marshy area found near estuaries. Estuaries are partly sheltered areas found near river mouths where freshwater mixes with seawater. Mangrove...
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