Pre-Knowledge Quiz: Elements and Compounds

What is the smallest building block of all matter?

• a molecule

• an atom

• a cell

• a mixture

Which of the following is a pure substance?

• saltwater

• air

• sugar

• soil

When you mix sand and water, what do you get?

• a solution

• a compound

• a mixture

• an element

The symbol for the element 'oxygen' is:

• Ox

• O

• Oy

• H₂O

Which of these is an example of a chemical change?

• melting ice

• dissolving sugar in water

• tearing a piece of paper

• burning wood

A substance that is made of only one type of atom is called a(n):

• compound

• mixture

• element

• solution

Water (H₂O) is an example of a:

• mixture

• element

• solution

• compound

Which of these is a physical property of matter?

• flammability

• density

• reactivity with acid

• ability to rust

When salt is dissolved in water, the salt is called the:

• solvent

• solute

• solution

• compound

Air is an example of a:

• compound

• pure substance

• mixture

• element