Matter and Conservation of Matter

Jennifer left her bike outside, buried in snow. In the spring, when the snow melted, she found her bike covered in rust. Which best describes the change to the bike?

• It was a chemical change, because the bike was a different color.

• It was a chemical change, because the rubber tires were deflated.

• It was a chemical change, because rust can be removed from the metal.

• It was a chemical change, because rust is a new substance on the metal.

Tags

NGSS.MS-PS1-2

Barb has a bucket of snow with a mass of 20 kg. After the snow melts, what will most likely be the mass of the bucket of water?

• 15 kg

• 20kg

• 35 kg

• 40 kg

Tags

NGSS.MS-PS1-5

Sam built a rocket using a full set of blocks. How would taking the rocket apart effect the total mass of the blocks?

• The total mass of the blocks would double

• The total mass of the blocks would be the same apart as together.

• The total mass of the blocks would decrease because they are together.

• The total mass of the blocks would increase because the blocks are apart.

Tags

NGSS.MS-PS1-5

Johnny tore a sheet of paper into pieces. How does the mass of all the pieces compare to the mass of the sheet before it was torn?

• The total mass of the pieces would be greater than the mass of the whole sheet.

• The total mass of the pieces would be less than the mass of the the whole sheet.

• The total mass of the pieces would be more than twice the mass of the whole sheet.

• The total mass of the pieces would be the same as the the mass of the whole sheet.

Tags

NGSS.MS-PS1-5

Maya adds 6 grams of sugar to a bottle containing 14 grams of warm water. What is the total weight of the sugar and water?

• 6 grams

• 8 grams

• 14 grams

• 20 grams

Elsa is making a grilled ham-and-cheese sandwich. She uses a 20-gram slice of cheese, 40 grams of sliced ham, and two 15-gram slices of bread. After she heats the sandwich on a griddle, the cheese is melted. What will be the mass of her sandwich?

• 55 grams

• 60 grams

• 75 grams

• 90 grams

Which is an example of a chemical change?

• melting ice to make water

• baking cake batter to make a cake

• putting cheese on bread to make a cheese sandwich

Tags

NGSS.MS-PS1-2

Which example best describes a physical change?

• baking a pie

• burning a candle

• making a paper airplane

Tags

NGSS.MS-PS1-4

A glass of water is placed outside during a hot day. After a few hours, someone notices that there is less water in the glass. Which best explains why this happened?

• water melted; gas formed

• water evaporated; gas formed

• water evaporated; liquid formed

Tags

NGSS.MS-PS1-4

NGSS.MS-ESS2-4

Which best describes why deflating the air from a basketball is an example of a physical change?

• The basketball’s shape is changed.

• The basketball’s color is changed.

• The basketball’s size is changed.