Blitz Day 2: Changes in Matter and Conservation of Mass

Changes in Matter and Conservation of Mass
7.6C
8.6E

Focus

We will have 10 Days of Blitz to review concepts that will be tested.
Our Science 8 STAAR Test is April 16th!!

10 Day Blitz Review

STAAR Blitz Day 2

Multiple Choice

Physical changes can be brought about by

• Cutting
• Bending
• Dissolving
• All of the following are correct.

Multiple Choice

Which of the following is NOT an example of a physical change?

• crumpled paper
• pencil sharpening
• shrunken clothing
• rust

Multiple Choice

How do you know that a chemical change such as rusting is a chemical change?

• it changes color

• atoms were rearranged to form a new substance

• we just know

• the rust

Multiple Choice

Ice (solid) can change to a liquid (water). This is a demonstration of a ______________________.

• physical change

• chemical change

• neither

• density

Multiple Choice

Did a chemical change take place?

• yes

• no

Multiple Choice

Did a chemical change take place?

• yes

• no

Multiple Choice

The right side of the equation below is called the

• products
• reactants

Multiple Choice

The left side of the equation below is called

• Products
• Reactants

Multiple Choice

Arrow in equation means

• product

• reactant

• yield

Multiple Choice

Is the following equation balanced or unbalanced?
Fe + S --> FeS

• balanced
• unbalanced

Multiple Choice

Is this balanced?...
Al + O₂ --> 2Al₂O₃

• Yes!
• NO!

Multiple Choice

32 g of Oxygen completely reacts with 8 g of Hydrogen to produce _____ g Water

• 8

• 12

• 24

• 40

Multiple Choice

The Law of Conservation of Mass says that matter can neither be __________ or __________.

• created; destroyed

• recycled; renewed

• subtracted; added

• joined; separated

Multiple Choice

What does the principle of conservation of mass mean?

• The total mass of the reactants is more than the products
• The total mass of reactants is equal to the mass of the products.

• The total mass of the reactants is less than the products