Designing Solutions for an Oil Spill In this activity, you will examine solutions that will help reduce the effects of oil spills on aquatic ecosystems. You will
evaluate three solutions to clean up an oil spill and suggest ways to improve the solutions.
Estimated time to complete: 1 hour
Use the information in this scenario to answer the questions that follow:
Natalia's teacher challenges her students to design a way to clean up oil spills. She gives the students a bowl of
water with a small amount of oil on top. She tells them to use the bowl as a model to figure out a way to remove
oil from ocean water while limiting the negative effects on the ocean's ecosystem. Each group is to come up with
three possible solutions and then test the solutions. They'll use the results from the tests to design a device to
remove the oil from the ocean.
Part A
The first step to engineering is to define the problem. Write down the problem the students have to solve, and
describe the challenges they will face when coming up with a solution.

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

explanation:

a