Conservation of Mass

A student poured 25 grams of sugar into a beaker containing 100 milliliters of water. What is the mass of the mixture after the sugar dissolves?

• 75 grams

• 110 grams

• 125 grams

• 100 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The waiter in a restaurant brought a customer a glass of ice water. The glass contained 300 mL of water and 50 grams of ice cubes. The customer didn’t drink any of the water, and the ice melted. What was the total mass of the contents of the glass after the ice melted?

• 350 grams

• 300 grams

• 50 grams

• 250 grams

Tags

NGSS.MS-PS1-4

A sheet of paper with a mass of 10 grams is cut exactly in half. What is the mass of each half of the sheet of paper?

• 10 grams

• 5 grams

• 2 grams

• 20 grams

Tags

NGSS.5-PS1-2

A baker is making a cake. He adds 400 grams of flour, 100 grams of sugar, and 200 grams of butter to a bowl. What is the mass of the mixture, excluding the bowl?

• 400 grams

• 700 grams

• 600 grams

• 100 grams

Three cups have 100 mL of water each. 25 grams of sugar is dissolved in Cup A. 15 mL of blue food coloring is stirred into Cup B. 50 grams of sand is added to cup C. Which of the following is a true statement about the mass of the three cups?

• Cup C has a greater mass than Cup A

• Cup B has a greater mass than Cup C

• Cup A has less mass than Cup B

• All three cups have the same mass

120 grams of ice cubes are placed in a sealed container and left on a table. After a while, the ice melted into water. What is the mass of the water?

• 100 grams

• 120 grams

• 130 grams

• 90 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Substance A has a mass of 50 grams. Substance B has a mass of 50 grams. Substances A and B are mixed and a reaction occurs that produces Substances C and D. Substance C has a mass of 60 grams. What is the mass of Substance D?

• 100 grams

• 110 grams

• 160 grams

• 40 grams

Tags

NGSS.MS-PS1-5

A beaker containing 150 grams of saltwater is placed on a hot plate. The water boils, then evaporates from the mixture, leaving 25 grams of salt. How much water was in the mixture before it evaporated?

• 175 grams

• 75 grams

• 125 grams

• 100 grams

Tags

NGSS.MS-PS1-4

A pizza is cut into 8 identical pieces. If each slice of pizza is 100 grams, what would be the mass of the entire pizza?

• 108 grams

• 100 grams

• 180 grams

• 800 grams

A chocolate bar that had a mass of 130 grams was left outside on a hot day, and it melted. What was the mass of the chocolate after it melted?

• 120 grams

• 140 grams

• 100 grams

• 130 grams

Tags

NGSS.MS-PS1-4