Studies Weekly Physical Science Week 2

How many known elements are there?

• 100
• 5000
• 5
• 35

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 definition of an atom?

• The smallest part of any substance which can exist on its own
• Two or more atoms chemically joined together (can be the same or can be different)
• A simple substance in which all the atoms are identical
• Two or more different elements chemically joined together

What is the definition of an element?

• The smallest part of any substance which can exist on its own
• Two or more atoms chemically joined together (can be the same or can be different)
• A simple substance in which all the atoms are identical
• Two or more different elements chemically joined together

What is the definition of a molecule?

• The smallest part of any substance which can exist on its own
• Two or more atoms chemically joined together (can be the same or can be different)
• A simple substance in which all the atoms are identical
• Two or more different elements chemically joined together

All matter is made of .....

• energy 
• atoms 
• air
• chemistry

Mass is _____________.

• another name for mixtures that go together
• the length of an atom's nucleus
• the center of  a compound
• the amount of matter in an object

We have weight because of ____________.

• space
• gravity
• mass
• volume

Who patented a device to remove cataracts from the lenses of eyes?

• Einstein
• Dr. Patty Balton
• Dr. Patricia Bath
• Paul Revere

Why is gold an element?

• it's made up of only lead atoms
• it's made of only silver atoms
• it's made of gold and silver atoms
• it's made of only gold atoms