Which of the following is important to slowing pond succession and keeping a pond healthy:
A. Keeping a 100-foot-wide buffer of thick plant growth around the pond.
B. Stopping excess erosion.
C. Stopping runoff loaded with fertilizers, pesticides or other pollutants.
D. All of the above.

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.

well first you need the sample of the temperature and gas level. i couldnt write a hypothesis unless i had some data. i think temperature changes will effect volumes of gas because gas changed into a solid or liquid at specific temperatures.

condenser is used to focus in the light microscope.