4/19

How many elements are represented in the products in the equation?

• 2

• 3

• 4

• 5

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

What will happen when these magnets are brought close together?

• They will attract each other.

• They will repel each other.

• Both magnets will turn to the left

• Both magnets will turn to the right

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What can you use to make an electromagnet?

• Battery, nail and string 

• Battery, pencil and wire

• Wire, battery and iron ore (nail)

• Peanut butter, lampshade, hand sanitizer

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What kind of magnet can be turned on and off?

• permanent magnet

• electromagnet

• magnetite

• iron

Tags

NGSS.MS-PS2-3

What is this?

• permanent magnet

• electromagnet

• series circuit

• parallel circuit

Tags

NGSS.MS-PS2-3

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Add more coils of wire to the nail.

• Use a smaller battery.

• Reverse the poles of the magnet.

• Remove all the coils and the nail.

Magnets can attract to which object?

• paper

• wood

• iron

• plastic

Tags

NGSS.3-PS2-3

What is the result of the chemical reaction when 4 moles of hydrogen gas react with 19 moles of oxygen gas?

• 4 moles of water

• 8 moles of water

• 12 moles of water

• 16 moles of water

Tags

NGSS.MS-PS1-5

In a scientific experiment, if the ratio of reactants is 4:19, what does this imply about the limiting reactant?

• The reactant with 4 parts is limiting

• The reactant with 19 parts is limiting

• Both reactants are limiting

• Neither reactant is limiting

If a scientist observes a 4/19 ratio in a chemical reaction, what is the percentage of the first reactant?

• 17.39%

• 21.05%

• 25.00%

• 30.00%