TN Ready 7PS1.2 and 7PS1.4 Review Lesson

Multiple Choice

When two or more atoms come together, they form a what?

• Another Atom

• A Solid

• An Element

• A Molecule

Open Ended

How can we tell if something is just mixed or if a chemical reaction happened?

Multiple Choice

What are some examples of physical properties that can help identify substances?

• Color and texture

• Density

• Solubility

• All of the above

Multiple Choice

If you spilled nails in a sandbox, what separation tool/method could you use to clean out the sandbox so it would be safe for children to play in?

• Filter

• Screen

• Magnet

• Evaporation

Open Ended

What clues tell us that new substances were formed?

Multiple Choice

What happens to atoms during a chemical reaction?

• They are created and destroyed

• They rearrange and form new bonds

• They disappear completely

• They remain unchanged

Dropdown

Examine the experiment shown, then fill in the blanks.



The experiment shows a ​

Select answer

system.

The mass at the end of the experiment will be ​

Select answer

the initial mass.

Multiple Choice

How many grams of OXYGEN would be needed to show conservation of mass in the example below?

• 100 g

• 93 g

• 7 g

• 0 g

Fill in the Blanks

Multiple Choice

EXPERIMENT #3

REACTANT(S) ------> PRODUCT(S)

12 .2 g Magnesium + 8.0g Oxygen ------> _____Magnesium Oxide

Assuming that magnesium and oxygen will react completely with one another, predict the mass of magnesium oxide that will be produced. _________

• 12.2 g

• 8.0 g

• 20.2 g

• 4.2g

Multiple Choice

EXPERIMENT #4

If the cap had been removed during the reaction (open system), would there still be 44g of Product in the jar?

• No, some of the substance was lost out of the container as a gas

• Yes, mass can't be destroyed

Multiple Choice

A scientist mixed 100 grams of salt into a 500 grams of water. How many grams of salt water did I make?

• 500g

• 400g

• 600g

• 700g