2nd 6 Weeks Test Reteach

1. Identify Elements

2. Write down subscript

3. multiply Coefecient​

​ 4. multiply paraenthesis

​Counting Atoms Steps

Multiple Choice

Which of the models best represents CaCO₃?

Multiple Choice

How many elements are in C₆H₁₂O₆?

• 1

• 2

• 3

• 4

Multiple Choice

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

Multiple Choice

How many O's are in Al₂(SO₄)₃

• 4
• 12
• 7
• 24

Multiple Choice

Which of the following is an element?

• FeO
• O₂
• NaOH
• SiO₂

Multiple Choice

Which of the following is a compound?

• Ca
• Pb
• H₂
• MgBr

Multiple Choice

How many elements are in the compound C₂H₈O ?

• 2
• 1
• 3
• 0

Multiple Choice

How many Hydrogen atoms are on the reactant side of this chemical equation?            
2C₂H₂ + 5O₂  --->  4CO₂ + 2H₂O

• 2
• 4
• 6
• 8

Multiple Choice

A change in which NEW substances are formed.

• Chemical change
• Physical change
• Casual change
• Formal change

Multiple Choice

Which of the following could indicate a chemical change? 

• All of the answers could indicate Chemical Change 
• a color change has occurred 
• bubbles appear 
• identifying one or more new chemical products 

Multiple Choice

 Which is NOT an example of chemical change?

• production of gas.
• change in color.
• change in size.
• transfer of energy.
  

Multiple Choice

Which of the following IS a chemical change

• using chalk
• water freezing
• slicing cheese
• digestion

Multiple Choice

The mass after a physical change, such as ice melting into water, stays the same

• True
• False

Same direction - ADD

Opposite direction - Subtract​

​

​

​Calculate Force

Multiple Choice

What is the net force?

• 10 N
• 0 N
• 25 N
• 1 N

Multiple Choice

What is Newton's 1st law of motion?

• An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force
• F=MxA
• For every action there is an equal and opposite reaction

Multiple Choice

A runners races in the 100 meter dash.  It takes her 10 seconds to finish.  What is her average speed?

• 10 m/s
• 1000 m/s
• 100 seconds
• 10 seconds

Multiple Choice

F=MA
An object of mass 10 kg is accelerated upward at 2 m/s².  What force is required? 

• 20 N
• 2 N
• 5 N
• 0 N

Multiple Choice

Which is an example of speed?

• A car driving 55 miles per hour south.

• A bicyclist traveling 10 meters per hour toward the next town.

• A roller coaster is traveling 10 meters per second.

• A rocket blasting off at 2,500 meters per second toward space.

Multiple Choice

Which is an example of velocity?

• A car driving 55 miles per hour south.

• A bicyclist traveling 10 meters per hour.

• A roller coaster is traveling 10 meters per second.

• A rocket blasting off at 2,500 meters per second.

Multiple Choice

Which is NOT an example of Acceleration?

• An object speeds up

• An object slows down

• An object changes direction

• An object is in constant motion.

Multiple Choice

A boy runs 400 m at an average speed of 4.0 m / s. He runs the first 200 m in 40 s. How long does he take to run the second 200 m?

• 60 s

• 66.7 s

• 80 s

• 140 s

Multiple Choice

What is happening at D?

• Stationary
• Accelerating
• Fast steady speed; moving away from the starting position
• Slower steady speed; moving away from the starting position

Multiple Choice

What is happening at C?

• Stationary
• Accelerating
• Fast steady speed; moving away from the starting position
• Slower steady speed; moving away from the starting position

Multiple Choice

Multiple Choice

Which of the following can be inferred from the graph?

• The object is experiencing acceleration.

• The object is moving along a curved path.

• The object has a negative acceleration.

• The object moves at a constant speed.

Multiple Choice

Check all that apply to the graph.

• moving away from the original position

• moving towards the original position

• object at rest

• positive acceleration

• negative acceleration

Multiple Choice

Which graph shows the object standing still?

• A
• B
• C
• D

Multiple Choice

What is this line of this graph showing?

• moving away from starting point at a constant speed

• moving back towards the starting point

• acceleration (getting faster)

• deceleration (getting slower)

Multiple Choice

Which runner won the race?

• A
• B
• C

Multiple Choice

Which graph is showing acceleration (getting faster)

• D
• E
• both D and E
• neither D or E

Multiple Choice

How long did it take this object to travel 10 m?

• 0 s
• 10 s
• 15 s
• 20 s

Multiple Choice

Which line represents an object moving at a faster speed?

• A
• B