Explain how the Earth itself is a system and describe an example of an interaction within this system.

Babies with very low or very high weight are less likely to survive .

What is the primary goal of human communities?

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