Elements & Compounds

An example of matter made of only one element is

• water
• gold bar
• light bulb
• salad mixture

The chemical symbol for Helium is

• H
• Hg
• He
• O

The chemical symbol for Oxygen is

• Ox
• Og
• O
• On

The chemical symbol for Silicon is

• S
• Sn
• Sc
• Si

The chemical symbol for Carbon is

• C
• Cb
• Ca
• Cn

What element is found in all four areas of the earth that we studied?

• Sodium (Na)
• Oxygen (O)
• Carbon (C)
• Nitrogen (N)

The two most common elements found in the oceans are______ & _______.  Remember oceans are made up of water.

• Sodium and Nitrogen
• Oxygen and Aluminum
• Iron and Carbon
• Oxygen and Hydrogen

What is the most abundant element found in the earth's atmosphere?

• Oxygen
• Sulfur
• Nitrogen
• Argon

This element occurs in large amount in the atmosphere and small amount in living things.

• Nitrogen
• Oxygen
• Argon
• Carbon

 Chemical symbols for two elements that occur in the earth's atmosphere are

• Si and Al
• Ar and Al
• O and N
• H and N