Thursday, March 21, 2013

The Chemistry Of Water

1. Describe how water molecules are bonded.
- Water molecules are bonded by a covalent chemical bond

2. Describe how the positive and negative charges of water are distributed.
- Water is considered electrically neutral. the charges positive and negative are not distributed.

3. Describe the chemistry of water that allows an insect to walk on water.
- The surface of the water acts like a layer of elasticity when a small weight is placed upon it. This is called the surface tension of water.

4. What is unique about water and its density?
- When most liquids are formed into a solid the mass increase but when water is formed into ice the mass decreases which it allow it to float.


Tuesday, March 12, 2013

Sediment Core And History

1. Who is the author, and what is she researching?
- The author is Alyson Santoro and she is studying microbes in the nitrogen cycle.

2. What technique is the researcher using that is especially good at recovering delicate sediments?
- The technique is called multicoring.

3. What happens to the samples after it is loaded onto the ship?
- The scientist are on a mad dash to remove the cores from the frame and rushed into a special room called cold van.

4. What is the name of the research vessel?
- The name of the research vessel is called the melville.