If an object rolls over (type of material), then it will (describe the prediction of distance it will travel).

Apossible explanation for a set of facts that can be tested by further investigation is called

What causes the development of most clouds and precipitation in the atmosphere?

The illuminance of a surface varies inversely with the square of its distance from the light source. if the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters, by how many meters should the distance of the surface from the source be increased to reduce its illuminance to 30 lumens per square meter?