The Law of Conservation

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

Liam, Elijah, and Nora are having a balloon popping contest. They take a balloon with a mass of 5 grams, blow it up, and pop it. After the balloon is popped, they collect all the pieces and weigh them. What would be the total mass of the pieces?

• 2.5 grams

• 5 grams

• 7.5 grams

• 10 grams

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Imagine this: Mia is making a magical potion. She adds 6 grams of fairy dust (sugar) to a bottle containing 14 grams of warm unicorn tears (water). Can you tell how much does Mia's magical potion weigh in total?

• 6 grams

• 14 grams

• 8 grams

• 20 grams

Tags

NGSS.MS-PS1-5

A 100 kg rock is broken into five smaller rocks for a garden. What is the

TOTAL mass of all five smaller rocks?

• 20 kg

• 50 kg

• 100 kg

• 500 kg

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 the SAME as the 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.

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.

• The total mass of the blocks would decrease.

• The total mass of the blocks would increase.

Tags

NGSS.MS-PS1-5

Priya, Mia, and Emma are having a snowball fight! Priya 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

• 20 kg

• 35 kg

• 40 kg

Tags

NGSS.MS-PS1-5

Avery, Nora, and Luna are having a discussion about ice cubes. They observe an ice cube in a cup (Figure 1) and then watch it melt into water (Figure 2).

Which property of the ice cube remains the same both before and after it melted?

• weight

• color

• shape

• temperature

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Two kilograms of water are placed in a closed container. The container is

placed in the freezer, and after a few hours it turns into ice. Which is

most likely the mass of the ice?

• 1.0 kilogram

• 1.5 kilograms

• 2.0 kilograms

• 2.5 kilograms

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-4

The table below lists the amounts of the ingredients Stephanie used

to make ice cream.

What will be the weight of the ice cream after being frozen?

• 250 g

• 290 g

• 230 g

• 210 g