Conservation of Matter

The photo shows a child eating cereal and milk. The mixture is made from 80 grams of cereal and an unknown amount of milk. The mass of the cereal and milk together is 170 grams. What is the mass of the milk?

(a)  

Metal pieces are mixed with wood shavings. Which TWO statements are true about the physical properties of the mixture?

• The physical properties of the metal pieces WILL change.

• The physical properties of the metal pieces WILL NOT change.

• The physical properties of the wood shavings WILL change.

• The physical properties of the wood shavings WILL NOT change.

Tags

NGSS.MS-PS1-2

A sample of 50 grams of salt is dissolved in water. How could you show, or demonstrate, that the salt remains in the water, and has not been changed?

Tags

NGSS.MS-PS1-5

The mass of a mixture of red and blue gumballs is 280 grams. Which of the following combinations of gumballs are possible?

Select TWO correct combinations.

• 140 g red gumballs,

  140 g blue gumballs

• 150 g red gumballs,

  130 g blue gumballs

• 180 g red gumballs,

  80 g blue gumballs

A student prepares a solution of sugar and water.

How do the physical properties of sugar and water change when they form a solution.

• They do not change.

• The sugar dissolves inside the water. We cannot see the sugar anymore because the particles are spread evenly apart.

Tags

NGSS.MS-PS1-2