Basic Chemistry and properties of water

Label the parts of the atom

a

b

electrons

Nucleus

Tags

NGSS.MS-PS1-1

Match the following

• Neutron

• Negative charge

• Proton

• Neutral (no charge)

• Electron

• Postive charge

Tags

NGSS.MS-PS1-1

NGSS.MS-PS2-3

Match the following

• smallest particle of an element

• 
• Pure substance made of 1 type of atom

• 
• 2 or more elements combined

• 
• Atoms united by sharing electrons

• 

Tags

NGSS.MS-PS1-1

The atoms of different elements have different number of _____

• Protons

• chemicals

• Neutrons

Tags

NGSS.MS-PS1-1

How many protons in an atom of Oxygen?

• 8 protons

• 16 protons

• 15 protons

Tags

NGSS.MS-PS1-1

Water molecules have opposite electric charges is called .....

• compound

• polar molecule
• solution

Answer explanation

It is a polar molecule because of the unequal sharing of electrons creating a slightly negative pole and a slightly positive pole in the same molecule.

Tags

NGSS.MS-PS1-1

Water particles are attracted because of

• Chemical bond

• equal charges

• opposite charges

Water has a high specific heat . This means the temperature of water changes...

• Rapidly, needing a little energy

• Slowly, and needing much energy

• Rapidly, needs no energy

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Water dissolves many substances. This is important to living things because

• Water changes to ice when cold

• Water floats when it is ice.

• Water transports dissolved nutrients into our cells.

Answer explanation

A solvent is a liquid that allows other substances to dissolve into it. Remember, most chemical reactions happen in solution (dissolved in a liquid).

Tags

NGSS.MS-LS2-3

NGSS.MS-PS1-2

How is this lizard able to run across water?

• The lizard is not heavy

• The water is ice

• The water molecules attract and are difficult to break apart.