Posted by **saranghae12** on Monday, November 7, 2011 at 9:01pm.

what are two ways a population may decrease in number? Explain the difference between direct and indirect observation in regard to determining population size.

Please help!!!

Thank you!!

- 7th grade science -
**Ms. Sue**, Monday, November 7, 2011 at 9:21pm
http://en.wikipedia.org/wiki/Demography

- 7th grade science -
**saranghae12**, Monday, November 7, 2011 at 9:25pm
thank you!! it helped me alot :)

- 7th grade science -
**Ms. Sue**, Monday, November 7, 2011 at 9:28pm
You're very welcome. :-)

- 7th grade science -
**Anonymous**, Wednesday, November 16, 2011 at 6:41pm
if 200mL of water were used instead of 100mL,how many grams of the compound would dissolve at 40c

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