Answer:
It’s impossible to know what would happen
Explanation:
If contaminated water is pumped form an aquifer, cleaned and pumped back, it would be impossible to know what would happen unless the source of the contaminant is known.
<u>If the source of the contaminant is known</u> and removed before the water is pumped back into the acquifer, the water would be clean and stay clean provided that all the water was initially pumped off. If the source of the contaminant is not known, it would be difficult to predict what would happen.
Answer:
Most biomolecules are organic compounds, and just four elements—oxygen, carbon, hydrogen, and nitrogen—make up 96% of the human body's mass.
Explanation:
<span>The answer to question 20 is C. Lines of latitude run parallel to the equator, appearing horizontal on a globe. The answer to question 18 is B - astronomy is a science that studies celestial bodies, and applies work from astrophysics and planetary science. Question 13's answer is D. Weight is the measure of gravitational force on an object and is measured in Newtons. The answer to question 12 is D. The independent variable is the variable the investigator changes to ascertain how this impacts on the dependant variable. The answer to question 11 is B. The classification of magma as basaltic, andesitic or rhyolitic depends on the percentage of silica it contains. The answer to question 10 is B. The particles in metal are held together by metallic bonds which involve closely packed ions and electrons that are free to move about and conduct electricity. The answer to question 3 is D. There are currently more than 24 GPS satellites in orbit, but this is the number that are operational most of the time. The answer to question 2 is B. The dependent variable is affected by the independent variable - it depends on the independent variable.</span>
