Sometimes we can see pollutants in water - such as floating trash. What pollutants might you not "see" in water but are dangerous to living things? (short answer please) no links please​

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.