IQWST Unit 3

Which is the least dense material?

(Scientific Principle #7)

• grape

• syrup

• oil

• cork

Which one of the following is a chemical reaction?

• New atoms are formed when substances are mixed together

• A solid material melts and becomes a liquid

• Atoms of the reactants rearrange to form a new substance

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Rusting on a car is an example of...

(Scientific Principle #12)

• melting

• a mixture

• a phase change

• a chemical reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A puddle that dries up in the street is an example of which of the following?

(Scientific Principle #13)

• a chemical reaction

• a phase change

• dissolving

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

If the mass of an object is 15 grams and the volume is 3 cm³, what would the density be?

• 18 g/cm³

• 12 g/cm³

• 45 g/cm³

• 5 g/cm³

Which of the following observations were made with the "road salt & baking soda" experiment?

• Temperature change

• Production of a gas

• Production of a precipitate

• All of the above

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The "Law of Conservation of Matter"

• States that matter is created during a chemical reaction

• States that matter is destroyed during a chemical reaction

• States that atoms multiply during a chemical reaction

• None of the choices are correct

Tags

NGSS.MS-PS1-5

What does it mean for substances to interact during a chemical reaction?

• Atoms are added to make the product

• Atoms are destroyed to make the product

• Atoms are rearranged to make the product

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How do you know if a chemical reaction occurred?

• Just test the properties of the new substances.

• Just test the properties of the old substances.

• Test the properties of the new substances and compare them to the properties of the old substances.

Tags

NGSS.MS-PS1-2

Why does this model NOT represent a chemical reaction?

• There is the same number of atoms in your reactant and product.

• There is a different number of atoms in your reactant and product.

• The bonds are not located in the correct place.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5