After carrying out some tests at a local stream, you discover that the pH in the stream is extremely low. Based on this, you should
tell your friends to
A)
go home and play Xbox.
B)
build a raft to raft down the stream.
swim in and drink the water from the stream.
D)
not swim in or drink the water from the stream.

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 is usually (but not always) related to the metabolic processes of living organisms in its organic form?

Hershey and chase confirmed that dna, not protein, was the genetic material. how do the results of their two experiments support this conclusion?