RNJH 8th Grade Science Fall Final Exam Review

What determines how chemically reactive an element is?

• electrons
• valence electrons
• protons
• neutrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An object in motion will stay in motion, and an object at rest will stay at rest unless acted upon by an outside force is Newton's law of __________

• force and acceleration
• inertia
• action-reaction

Unbalanced forces describe objects that ___________

• travel at a constant speed
• travel at a constant velocity
• change speed/direction

Tags

NGSS.MS-PS2-2

Balanced forces would describe objects that_____

• move at a constant speed
• change speed
• travel at a slower speed
• change direction

Tags

NGSS.MS-PS2-2

Groups on the periodic table..........

• are horizontal
• are rows
• are from left to right
• go up and down

Periods on the periodic table ..........

• are verticle
• go from left to right
• are families
• go up and down

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

Tags

NGSS.MS-PS1-1

The positive particles of an atom are called:

• electrons 
• positrons 
• neutrons 
• protons 

Tags

NGSS.MS-PS1-1

2H2O + 2N → 4H + 2NO
The chemical symbols on the RIGHT are called:

• products
• reactants
• yields/produces

Tags

NGSS.MS-PS1-5

2H2O + 2N → 4H + 2NO
The chemical symbols on the LEFT are called:

• products
• reactants
• yields/produces