Describe how seismologists discovered that most of the mantle is solid.

Barbara is converting 78°f to degrees celsius. first, she subtracts 32 from 78. what is the next step?

Which codon is the code for the amino acid histidine (his)?

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