8th Grade Unit 1 Test Review

Organize these options into the right categories

Groups:

(a) Qualitative Observations

,

(b) Quantitative Observations

• Slippery

• Soft

• Smaller

• 3 miles

• Red

• 6 ft

• 4 legs

• 7" tall

Reorder the following

• Independent variable (what the scientist is choosing)

• If

• then

• Dependent variable (what the result of the experiment is)

Tags

NGSS.MS-PS2-2

Which describes the periods of the periodic table?

• rows, same # electron shells

• columns, same # of valence electrons

Which describes the groups of the periodic table?

• rows, same # electron shells

• columns, same # of valence electrons

Match the following for the formula: Co₃B₄N

• 1

• Number of Cobalt atoms

• 3

• Number of Boron atoms

• 4

• Number of nitrogen atoms

Tags

NGSS.MS-PS1-1

Covalent bonds ​ (a)   electrons while Ionic bonds ​ (b)   electrons

• share
• donate
• release
• lose
• create

Tags

NGSS.HS-PS1-1

Acids and bases react to one another. When turmeric comes in contact with baking soda what happens?

• It turns red

• It turns blue

• It disappears

• creates bubbles

Tags

NGSS.MS-PS1-2

Substances that react to water are known as ​ (a)   and substances that do not react to water are known as ​ (b)  

• hydrophilic
• hydrophobic
• compounds
• molecules
• cohesion
• adhesion

Why are phenomena like a meniscus in a graduated cylinder or the transport of water in plants through xylem possible?

• Cohesion and adhesion

• Surface Tension

• Covalent bonds

• Ionic Bonds

Organize these options into the right categories

Groups:

(a) Elements

,

(b) Compounds

• cannot be broken apart

• 118

• metal, nonmetal,metalloid

• needs chemical reaction to break apart

• 2 or more atoms

• chemically bonded

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5