Science Review

A water molecule has the chemical formula H2O. This means that the water molecule is made up of

• Two hydrogen atoms and one oxygen atom

• Two oxygen atoms and one hydrogen atom

• Two hydrogen atoms and two oxygen atoms

• Two molecules of water

Tags

NGSS.MS-PS1-1

How do you find out the number of protons in an atom?

• atomic number
• atomic mass
• charge
• atomic mass - atomic number

How do you find out the number of neutrons in an atom?

• atomic number
• atomic mass
• charge
• atomic mass - atomic number

All matter is made of _________. 

• energy 
• atoms 
• electrons 
• compounds 

Tags

NGSS.MS-PS1-1

The part of the atom that determines the identity of the atom is the ____________.

• proton
• nucleus
• electron
• neutron

Tags

NGSS.MS-PS1-5

A substance that is made up for one type of atom is called an:

• atom
• element
• compound
• mixture

How are elements ordered on the Periodic Table?

• Alphabetical Order
• By their color.
• By their atomic mass.
• By their atomic number.

Matter is...

• a substance made up of only one kind of element
• anything that has mass and takes up space

Tags

NGSS.MS-PS1-4

A molecule is...

• two or more atoms linked together
• anything that has mass and takes up space

Tags

NGSS.MS-PS1-1

Which of the following determines if an object sinks or floats?

• density
• mass
• weight
• volume