3 What are examples of environmental pressures? Choose more
than one answer.
Food shortage
Fewer predators
Lack of water
Loss of habitat
Fewer competing species

Which type of fossil does this image depict?

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?