Conservation of Mass

the law of conservation states

• matter can be created

• matter can be destroyed

• matter cannot be created or destroyed

• matter is not a thing

Tags

NGSS.MS-PS1-5

Adam has an apple that is 5 grams .If Adam cuts the apple in to 5 slices .How many grams is the cut up apple.

• 25 grams

• cannot be calculated

• 10 grams

• 5 grams

Tags

NGSS.5-PS1-2

Sarah has 5 beads.All beads together weigh 10 grams.How many grams is each beads.

• 5 gram

• 2 grams

• 15 grams

• 10 grams

In a chemical reaction ,300 grams of reactant A are combined with 100 grams of reactant B.Both A and B react to a completion.How much will the product weigh?

• 200 grams

• 400 grams

• 300 grams

• it can not be determined from the given inforation

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

in a reaction,25 grams of reactant AB breaks down into 10 grams of product A and an unknown amount of product B.Using the law of conservation of mass,how much does product B weigh.

• 25 grams

• 10 grams

• 15 grams

• It cannot be determined from the given information

Tags

NGSS.MS-PS1-5

When you burn a candle,all that remains is a puddle of wax.The puddle of wax has less mass than the original candle.The rest of the original candle's mass was.

• destroyed

• changed to gas

• measured incorrectly

• none of the above

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

True or False:An astronaut weighs much less on the moon than on earth because he has much less mass on the moon.

• True

• False

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

True or False:Fire destroys the mass of the fuel that it burns.

• True

• False

Tags

NGSS.MS-PS1-5

True or False:The products of a chemical reaction can never have a greater mass than the reactants.

• True

• False

Tags

NGSS.MS-PS1-5

Jessica puts a(n) tray of ice cubes in the freezer that weigh 20 grams.The next day she takes the ice tray out and it the water is frozen.What is the mass of the ice in the ice tray?

• 20 grams

• it cannot be calculated

• 15 grams

• 10 grams