Conservation of Mass

Match

Match the following terms with its correct definition.

• Conserve

• Physical Change

• Chemical Change

• Product

• Reactant

To keep the same

Change in shape, size, or, matter

Heat,light, bubbles tarnish decay (NEW)

Ending substances

Beginning Substances

• To keep the same

• Change in shape, size, or, matter

• Heat,light, bubbles tarnish decay (NEW)

• Ending substances

• Beginning Substances

Making trail mix using 30 grams of pretzels, 15 grams of raisins, 10 grams of peanuts, and 40 grams of chocolate.

A+ B + C + D = F
30+ 15+ 10+ 40= 95 Grams of the trail mix

One watermelon weighs 30 grams. If you slice that watermelon, it will weigh 30 grams.

A+B+C= D
10 grams+10 grams+ 10 grams= 30 Grams

Physical Change

Law of Conservation of Matter
Reactants=Products

Open Ended

Johns weighed a bowl filled with water and determined its mass is 200 g. He then added and dissolved 50 g of salt and weighed the jar a second time with the dissolved sugar. What is the total mass of the jar with sugar water?

10 grams of baking soda is mixed with 10 grams of vinegar to create carbbon dioxide bubbles. What is the mass after mixing the ingredients?

A + B= C
10 grams + 10 grams = 20 grams

50 grams of leftovers food sealed in a bag that is left in the refrigerator over two weeks.


50 grams= 50 Grams

Chemical Change

Law of Conservation of Matter
Reactants=Products

Mass is Conserved.

​

​Reactants= Products

Use subtraction.

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Find the missing Piece

Open Ended

Maria poured 75 grams of cereal into a bowl of milk. If the cereal and the milk together (not including the bowl) had a mass of 225 grams, what was the mass of the milk?

Remember the Math!

Dropdown

150 is​

Select answer

50.

Dropdown

355 grams is​ ​

Select answer

210 grams.

Multiple Choice

A student filled two identical beakers, A and B, with 100 mL of water. She added 25 grams of sugar to Beaker A. The sugar dissolved in the water. She then added 25 grams of sand to Beaker B. The sand sank to the bottom of the beaker. Which comparison about the mass of the two beakers is correct?

• Beaker A < Beaker B

• Beaker A = Beaker B

• Beaker A = Beaker B

• Not enough information to find the mass.