Fill in the boxes below to identify variables, controls and constants.

What is called the "building block" of life?

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

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above