1. what is an algal bloom and how does it occur? (10 points)
2. what is a red tide, and how does it relate to algal blooms? (10 points)
3. if algae are natural organisms, why is it "bad" for the environment when they enjoy an increase in population? what is unnatural (related to humans) about an algal bloom? (10 points)
4. describe some possible solutions that scientists are working on to reduce the harmful effects of algal blooms. (10 points)

Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. a physical change doesn’t break the bonds between atoms of a substance or form new ones. compounds can be broken down by a chemical change. a chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. what simple substance would a compound break into? the basic elements that make it up! for example, if you passed a very strong electric current through water you’d break the chemical bonds in water and be left with oxygen and hydrogen. which of the following is an example of a chemical change? a separating water into different glasses b breaking frozen ice cubes with a hammer c running an electric current through water d boiling water to evaporate it on a stove

What do all macromolecules have in common with each other? oa. they all are formed from the same elements. ob. they all have major roles in cell membranesoc. they all act as catalysts in the body. od. they all have peptide bonds between carbon atoms.

This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment