This picture represents which of the following?

Which of the following is a compound?

Which of the following represents an element?

When one or more substance is combined CHEMICALLY it is called __________________.

A pure substance made of the same type of atom is an __________________.

Which sphere has living things?

Which sphere has all the gases and air on earth?

Which sphere of earth includes all of the water?

Which sphere of earth includes rocks and minerals?