Conservation of Matter

An oreo cookie weighs 20 grams.  It gets crushed into crumbs for a recipe.  How much do its crumbs weigh?

• 15 grams
• 25 grams
• 20 grams

_{Mrs. Roth's tea cup and hot tea weigh 100 grams.  She stirs in 10 grams of sugar. How much is the total amount of matter in Mrs. Roth's tea cup and tea now?}

• 100 grams
• 110 grams
• 90 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

If you put 200 grams of ice into a pitcher with 900 grams of water. Then get distracted and come back later to find that the ice has melted in the water. How many grams of water do you now have in the pitcher?

• 200 g

• 700 g

• 1,100 g

• 9,200 g

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-5

There are two reactants in a chemical equation, and one product.  The mass of the product is 30g.  The mass of the first reactant is 17g.  What must the mass of the second reactant be, if the equation is to follow the law of conservation of mass?

• 47g
• 13g
• 23g 
• You cant tell with the given information

Tags

NGSS.MS-PS1-5

The principle of conservation of mass is true for

• Physical Changes
• Chemical Changes
• Neither
• Both

Tags

NGSS.MS-PS1-5

A student mixes 125 grams of sugar, 250 grams of water and 5 grams of flavoring. The solution weighs...

• 250 grams

• 375 grams

• 380 grams

• 400 grams

Sarah and Jake were each given a ball of clay that has a mass of 400 grams. Both students used all their clay to make an object. Sarah rolled hers into a ball, and Jake made a long, skinny rope. What is the mass of the clay figures now?

• Sarah's weighs more because it is round

• Jake's weighs more because it is long

• There is no way of knowing

• They figures would have equal masses.

Stuart measures 10 grams of water into a pan and then freezes it. A day later, he takes the ice cube out of the pan and notices that it is larger than before. What will its mass be?

• 10 grams

• 11 grams

• 20 grams

• impossible to know

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A cup holds 125 grams of liquid water and 100 grams of ice. What is a reasonable mass for the water in the cup after the ice melts?

• 215 grams

• 175 grams

• 225 grams

• 230 grams

Tags

NGSS.MS-PS1-4

Shela is given 100 grams of clay to make animals. Using the clay, Shela makes a model cat weighing 70 grams. She wants to make a model dog also. What mass of clay does she have left to make the dog?

• 30 grams

• 70 grams

• 170 grams

• 100 grams