SC.8.P.8.1

Eduardo’s friend told him that to make his glow stick last longer, he needs to slow down the glow stick’s chemical reaction. Where would be the best location to store his glow stick?

• in a bowl of warm water

• in his closet

• under a fan

• . in the freezer

Tags

NGSS.MS-PS1-4

On a cold, winter morning, Julio uses a chemical hand warmer. Which of the following describes the heat flow that took place?

• from air to the hand warmer

• from the air to Julio’s hand

• from Julio’s hand to the warmer

• from the warmer to Julio’s hand

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

Which of the above figures best represents the depiction of an element?

• figure W

• figure X

• figure Y

• figure Z

Tags

NGSS.MS-PS1-1

100 degrees Celsius is the ----- of water.

• Melting point

• Freezing point

• Boiling point

Tags

NGSS.MS-PS1-4

What can you conclude from the picture?

• The rock and the cork have similar density.

• The rock is less dense than the cork, because the rock sank and the cork floats.

• The cork is more dense than the water.

• The cork is less dense than the rock or water.

Tags

NGSS.MS-PS1-2

What could you conclude from the picture?

• The edible oil is less dense than the lamp oil, but it is more dense than the milk.

• The milk is more dense than the dishwashing liquid, but less dense than the sugar syrup.

• The lamp oil is the most dense liquid shown.

• The water is more dense than the oils, but has equal density to the dishwashing liquid.

Tags

NGSS.MS-PS1-2

How might you separate this mixture?

• Magnetism then evaporation

• Evaporation then condensation

• magnetism only

• filtration only

Kallee is given a mixture of salt and water. What would be the best way for her to separate the salt from the water?

• Let the water evaporate.

• Pass a magnetic wand through the mixture until all of the salt is captured.

• Pass the mixture through a coffee filter.

• Lower the temperature to cause condensation to occur.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

What is matter?

• a pure substance

• anything that occupies space and possesses mass

• an element

• a compound

Tags

NGSS.MS-PS1-4

What is reactivity?

• how a substance combines physically with another substance

• how a substance combines chemically with another substance 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5