Unit 3 IQWST

Ari dissolves 1 gram of sugar in 10 grams of water. What will be the mass of the dissolved sugar and water?

(Scientific Principle #15)

• less than 11 grams

• more than 11 grams

• 11 grams

• It is not possible to tell from the data

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Evidence is ___________________

• A statement or conclusion that answers a question

• Scientific data that supports the claim

• A justification that connects the claim to the evidence

• Not vital when using an argument

Tags

NGSS.MS-LS1-3

NGSS.MS-LS1-4

NGSS.MS-LS2-4

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

Which properties were different between the magnesium ribbon & magnesium oxide after burning?

• color & solubility

• hardness & solubility

• solubility & density

• color & hardness

Tags

NGSS.MS-PS1-2

During the the electrolysis of water ....

• a chemical reaction occurred

• water molecules were destroyed

• a precipitate was formed

• none of the above occurred

Tags

NGSS.MS-PS1-2

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

In the following chemical reaction, what are the products involved.

• Copper & Acetic Acid

• Copper Acetate & Hydrogen Gas

• Copper

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Look at the atoms in this model. What do you notice about the number of atoms on each side of the arrow?

• The number of hydrogen atoms are different on the right side of the arrow compared to the left side of the arrow.

• The number of oxygen atoms are different on the right side of the arrow compared to the left side of the arrow.

• The number of oxygen atoms and hydrogen atoms are the same on both sides of the arrows.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The reactants of a chemical reaction has 4 hydrogen atoms. How many hydrogen atoms would be in the product?

• 0

• 4

• 8

• 16

Tags

NGSS.MS-PS1-5