It is common knowledge that elephants are deathly afraid of mice. What is not so common knowledge is the reason why. Clearly it can't be that the elep

Check all that apply diatoms are marine algae that have a shell made of silica, what are some of the uses of the silica shell after the diatoms die? 1.the shells make up the diatomaceous earth used in filters 2.it can be used as an ingredient in abrasives 3.they are used in food products 4.the shells can be used in some insulating materials

How many types of rock can form from the rock cycle

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?