The Chemistry of Water.

1. Describe how water molecules are bonded.

 In water, each hydrogen nucleus is bound to the central oxygen atom by a pair of electrons that are shared between them; chemists call this shared electron pair a covalent chemical bond. 







2. Describe how the positive and negative charges of water are distributed.

The H2O molecule is electrically neutral but the positive and negative chargers are not distributed uniformly. the electronic (negative) charge is concentrated at the oxygen end of the molecule.

3. Describe the chemistry of water that allows an insect to walk on water.

The water strider takes advantage of the fact that the water surface acts like an elastic film that resists deformation when a small weight is place on it.

 

4. What is unique about water and its density?

The distinction between molecules located at the surface and those deep inside is especially prominent  H2O owning to the strong hydrogen-bonding forces.

Sediment Cores & History.

1. Who is the author, and what is she researching?

       The Author is Alyson Santoro, and is a post doctoral researcher at Woods Hole oceanographic Institution, writes from off the coast of chile where she is studying microbes in the nitrogen cycle.

2. What technique did the researcher using that is especially good at recovering delicate sediments? 

       They use Multicoreing is especially good at recovering sediment samples 

3. What happens to the samples after it is located onto the ship?

        The look closely at the multibeam sonar images to find a relatively flat area of the bottom where the coring device an land.

4. What is the name of research vessel?

 The name of research vessel is Mellvie.

 

Essential Questions Economic Importance of Marine Sediments

1- What are some products that come from sediments?

Well... some products are building materials for roads and structures, toothpaste, paint, swimming pool filters and others.
2- How much of the world's energy comes from sediments?

About 36 % of the world's crude oil and 28 % of its natural gas will be extracted from sedimentary deposits of continental shelves and continental rises. Off shore drilling of hydrocarbons currently generates > $125 billion dollars.

3- How important is sand and gravel?

It's too important , because 1/3 of world's oil and gas reserve come from deposits within the sediments of continental margins. in addition to oil and gas sand and gravel valued at more than $510 million. this is about 1 % of world needs.

Reflection Mid-Term GoAnimate.

Well... I really think that we learned a lot, because in my case I didn't know how to use this program. After the demonstration that Mr. Blass gave us, I learned more than I know. I'll definitely practice more in the future to more easily use Go Animate.