23-24 First Semester Review

This diagram shows a balloon that is moving in one direction, while escaping air is moving in the opposite direction.

What causes the balloon to move?

• A Electrical forces

• B Forces of friction

• C Gravitational potential energy

• D Action-reaction forces

Tags

NGSS.MS-PS2-1

Trinitrotoluene is a chemical compound used as an explosive. The chemical formula for this compound is C₇ H ₅ N₃ O₆. How many total atoms are present in this compound?

• A. 4

• B. 21

• C. 63

• D. 63

Tags

NGSS.MS-PS1-1

Calculate the amount of force that would have to be applied to a 5 kg object to make it accelerate 25 m/s ²?

• A. 25 N

• B. 5 N

• C. 125 N

• D. 12.5 N

The chemical formula for ethanol is shown below .

C₂H₆O

What does the chemical formula tell us about ethanol?

• A. It has three atoms.

• B. It has eight atoms.

• C. It has twelve atoms

• D. It has nine atoms

Tags

NGSS.MS-PS1-1

Which of the following pairs of elements contains the greatest number of electrons?

• A. Hydrogen and Oxygen

• B. Sodium and Chlorine

• C. Copper and Sulfur

• D. Neon and Boron

Tags

NGSS.MS-PS1-1

How many atoms of chlorine are in the compound Al₂ Cl₉ K₃ ?

• A. 2

• B. 9

• C. 3

• D. 0

Tags

NGSS.MS-PS1-1

Which of the following shows unbalanced forces acting on each other?

• Option A: A book resting on a table
• Option B: A car moving at a constant speed

Tags

NGSS.MS-PS2-2

How many electrons does Nitrogen have?

• A. 10

• B. 12

• C. 7

• D. 11

Tags

NGSS.MS-PS1-1

Which three elements have the most similar chemical properties?

• A). K, Rb, Sr

• B.) Ne, Ar, Kr

• C.) O, N, P

• D.) B, C, N

What will the acceleration of the ball be once it has been kicked?

• A . 10 m/s ²

• B. 55 m/s ²

• C. 100 m/s ²

• D. 250 m/s ²

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1