Tuesday, March 16, 2010

Homework pg. 246-253 ?1-5

Question 1) Compare and contrast atoms and molecules.
Answer: An atom is made of electrons, protons, and neutrons. Molecules are groups of atoms.
Question 2) Describe the differences between an organic and an inorganic compound. Given an example of each type of compound.
Answer:Organic compounds contain carbon and hydrogen while inorganic compounds contain no hydrogen or carbon.
Question 3) List the four types of organic compounds found in all living things.
Answer: Carbohydrates, lipids, proteins, and nucleic acids are found in all living things.
Question 4) Infer why life as we know it depends on water.
Answer:We need water to live, to transport materials in our body, and we are composed of more than 50% of water in our bodies.
Question 5) Think Critically If you mix salt, sand, and sugar with water in a small jar, will the resulting mixture be a suspension, a solution, or both?
Answer: This mixture will be a solution. It is a solution because you are mixing three things together, and it isn't a suspension because there is no liquid for the dry compounds to sink it.

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