You find a rock that is very sandy and grainy. sand grains fall off as you handle it. what kind of rock do you suppose it is?

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?

Define a is a tiny pavket of energy

How can carbon move from "land" to bodies of water? describe the way human impact has lead to increased levels of co2 in the atmosphere.