Anything that takes up space and has mass is...

• Matter
• Work
• Power
• Newton's 1st Law

Tags

NGSS.MS-PS1-1

The Law of Conservation of Mass says...

• matter is created

• matter is destroyed

• matter is not created or destroyed, it is changed

• matter does not change

True or false: The Law of Conservation of Mass means that the number of atoms of the products (results) is more than the number of atoms in the reactants (ingredients).

• True

• False

Bob puts 200 grams of ice into a pitcher with 900 grams of water to create 1100 grams of ice water. He gets distracted and comes back later to find that the ice has melted in the water. How many grams of water does Bob now have in the pitcher?

• 200 g

• 700 g

• 1,100 g

Suppose a reaction were to happen in an open container in a lab. During the reaction, the scientist observes the chemicals bubble, and produce a gas. During the analysis the scientist notices that the reactants (ingredients) weighed 20 g when he started, and the product (results) weighed 18 g at the end. Explain what happened.

• His chemical reaction defied the law of conservation of mass

• Mass was destroyed during the reaction

• Matter was created during the reaction

• The gas that was produced it escaped into the air.

If reaction starts with 20g of reactants (ingredients) it should produce...

• a total of 40g of product

• a total of 10g of product

• a total of 80 g of product

• a total of 20g of product

10g of white powder reacts with 10g of clear liquid. The reaction bubbles and changes color producing a black liquid that has a mass of 13g. What can be concluded?

• 5g of gas was produced
• This experiment violates the conservation of mass
• 7g of gas was produced
• The excess reactant is destroyed & disappears during the reaction

In a chemical equation, you will ________________ have the same number of atoms on the reactant and product side.  

• always
• never
• sometimes

If there are 4 H atoms on the reactant side, how many H atoms will be on the product side? 

• 2
• 4
• 6
• You need more information to answer this question

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

At which point is potential energy greatest?

• W
• X
• Y
• Z

Tags

NGSS.MS-PS3-2