Answer:
It is one of many small estuaries along the east coast of the United States.
Explanation:
Which of the following is NOT true regarding the Chesapeake Bay?
A. It is one of many small estuaries along the east coast of the United States.
B. A large amount of sediment travels down the watershed into the bay.
C. It receives anthropogenic chemicals that adversely affect the local fish populations
.D. It receives nutrients from sewage treatment facilities.E. It experiences algal blooms from the fertilizers used on the land in its watershed.
Answer:
the earth is huge and round
Explanation:
I you are trying to find X. For the first triangle you want to do “x-9=5” and you should get x=14. For the second one you want to do “x+5=8” and you should get x= 3.
Answer:
B and C
Explanation:
B. In a given rock sample, the amount of Silicon-32 isotopes gets divided in half about every 170yrs.
This is the concept of half-life. Half life is the time take for half of a radioactive isotope to disintegrate. The shorter the half life the faster the isotope disintegrates.
From the question, we were told that it would take 170yrs for half of the isotope of Silicon to disintegrate to Phosphorus. This is the half life.
C. The half life can be used to determine the amount of Si-32 that has decayed from the time closure temperature was reached.
The closure temperature is very important in radioactivity. It is the temperature at which a system has cooled and there is no resulting disintegration of parent and daughter isotopes.
From first order kinetics, we know that the rate at which radioactive elements decay at any time is directly proportional to the number of radioactive atoms present. A knowledge of the half life helps to figure out the number of atoms that has decayed in time.
Answer: a diary of a person who raises and trains guide dogs
