Review observing and measure matter

Review observing and measure matter

By LACEY BANE

Multiple Choice

What is the smallest possible piece of an element called?

• An Atom

• A molecule

• An compound

• water

Multiple Choice

What is a molecule?

• a pure substance

• an element joined together

• two or more atoms joined together

• a small unit of element

Open Ended

Is water an element or a compound? How do you know?

Multiple Choice

About how many elements have scientists found?

• Less than 50

• Over 100

• 3

• 10000