A student designs an experimental investigation to test the relationship between the height of a ramp and the distance a marble travels down the ramp. Which would be an important rule to follow before beginning the investigation? A. Wear gloves to protect hands
B. Locate the fire extinguisher
C. Get plan approved by teacher
D. Properly dispose of materials

it would be f

explanation:

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.