2nd Six Weeks Review

Multiple Choice

How many different elements are present in this molecule?

3 NH₄C₂H₃O₂

• 15

• 36

• 5

• 4

Multiple Choice

How many Mn atoms are found in the following compound?

2MnO₄

• 1

• 2

• 4

• 8

Multiple Choice

What is the number before a chemical formula called?

Example: 2H₂ + O₂ ---> 2H₂O

• Coefficient

• Atom

• Subscript

• Equation

Multiple Choice

What is the little number after an element in a chemical equation called?

Example: H₂

• Coefficient

• Atom

• Subscript

• Equation

Multiple Choice

How many H atoms are there in this equation: HCl + H₂O ?

• 1

• 2

• 3

• 4

Multiple Choice

How many O atoms are found in H₂SO₄?

• 1

• 2

• 3

• 4

Multiple Choice

C₃H₅(NO₃)₃

• C = 3, H = 5, N = 3, O = 9

• C = 3, H = 5, N = 1, O = 9

• C = 9, H = 15, N = 3, O = 9

• C = 9, H = 15, N = 1, O = 3

Multiple Choice

Glucose is represented as $$C_6H_{12}O_6$$  . Which chemical formula has half as many Carbon atoms as Glucose?

• Lactic acid

  $$C_3H_6O_3$$  

• Sucrose

  $$C_{12}H_{22}O_{11}$$  

• Citric Acid

  $$C_6H_8O_7$$  

• Butane

  $$C_4H_{10}$$  

Multiple Choice

Glucose is represented as $$C_6H_{12}O_6$$  . Which chemical formula has twice as many Carbon atoms as Glucose?

• Lactic acid

  $$C_3H_6O_3$$  

• Sucrose

  $$C_{12}H_{22}O_{11}$$  

• Citric Acid

  $$C_6H_8O_7$$  

• Butane

  $$C_4H_{10}$$  

Multiple Choice

Glucose is represented as $$C_6H_{12}O_6$$  . Which chemical formula has HALF as many OXYGEN atoms as Glucose?

• Lactic acid

  $$C_3H_6O_3$$  

• Sucrose

  $$C_{12}H_{22}O_{11}$$  

• Citric Acid

  $$C_6H_8O_7$$  

• Butane

  $$C_4H_{10}$$  

Multiple Choice

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, changed
• None of the above

Multiple Choice

What is the right part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactants

• Yields

• Products

• Chemical Equation

Multiple Choice

What is the left part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactants

• Yields

• Products

• Chemical equation

Multiple Choice

If reaction starts with 20g of reactants it should produce 

• a total of 40g of products
• a total of 10g of products
• a total of 80 g of products
• a total of 20g of products

Multiple Choice

Which of the models of a chemical reaction best represents the Law of Conservation of Mass?

• A

• B

• C

• D

Multiple Choice

Which of the models of a chemical reaction best represents the Law of Conservation of Mass?

• A

• B

• C

• D

Multiple Choice

Is the following equation balanced?

Al + O₂ ---> 2Al₂O₃

• YES

• NO

Multiple Choice

How many TOTAL atoms are on the REACTANT side of this equation?
CH₄ + 2O₂ → CO₂ + 2H₂O 

• 5
• 7
• 9
• 11

Multiple Choice

A change in the shape of an object is an example of _________________.

• a chemical change

• energy

• an endothermic change

• a physical change

Multiple Choice

Which one shows that a chemical reaction has occurred?

• dissolving

• melting

• formation of a gas

• bending

Multiple Choice

In a ___________change, a substance changes into a different substance.

• Physical
• Chemical

Multiple Choice

Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?

• The shape of the coal changes
• Oxygen is present
• A new substance is produced
• Coal is made up of more than one element

Multiple Choice

The Theory of the Conservation of Energy states -

• Energy can be created, just not destroyed. It changes its form from one type to another.
• Energy can never be created nor destroyed. It can only change its form from one type to another.
• The total energy in our Universe changes, as different forms of energies can be transformed from each other under certain circumstances.
• Energy transformations do not passively occur in our lives, rather we actively make use of energies and transform energies.

Multiple Choice

A lamp is plugged into a wall outlet. Which sentence explains what happens to the electric energy as the light shines?

• The electric energy gets used up.

• The electric energy changes into light and heat energy and is destroyed.

• The electric energy is created again after it produces light and heat energy.

• The electric energy changes into light and heat energy and is not destroyed.

Multiple Choice

The diagram shows how a steam engine in a train works. Which description of the energy conversions in the process is correct?

• The chemical energy in the coal is converted to thermal energy, which is then converted to mechanical energy.

• The mechanical energy in the coal is converted to electrical energy, which is then converted to thermal energy.

• The electrical energy in the coal is converted to mechanical energy, which is then converted to thermal energy.

• The thermal energy in the coal is converted to electrical energy, which is then converted to mechanical energy.

Multiple Choice

Students built a simple circuit connecting a battery to a light bulb. Which energy transformations happen when the students close the circuit and the bulb lights up?

• Chemical to radiant to electrical

• Electrical to chemical to radiant

• Chemical to electrical to radiant

• Radiant to electrical to chemical

Multiple Choice

A teacher heats up their lunch in the microwave. What energy transformations occur between the microwave and the food?

• Electrical to light to chemical

• Chemical to thermal to light

• Electrical to electromagnetic to thermal

• Electrical to electromagnetic to chemical

Multiple Choice

Batteries have _________ energy.

• mechanical

• thermal

• chemical

Multiple Choice

When water falls through a dam and turns a turbine connected to a generator, electricity is produced. This electricity is often used to light our homes and offices. Which of the following shows the energy transformations that occurs?

• electrical → light → mechanical
• chemical → mechanical → electrical
• mechanical → chemical → light
• mechanical → electrical → light

Multiple Choice

The ability to do work by applying force is called

• work

• energy

• force

• net force

Multiple Choice

Which number shows kinetic energy at its maximum?

• three

• two

• four

• five

Multiple Choice

Stored energy or energy due to its position is called

• mechanical energy

• potential energy

• kinetic energy

• thermal energy

Multiple Choice

Which of the following statements about a skier skiing down a steep slope is true?

• His kinetic energy decreases and his potential energy increases

• His potential energy decreases and his kinetic energy increases

• His chemical energy increases

• Both his potential and kinetic energy increases

Multiple Choice

Which letter shows where is potential energy stored or at its maximum point?

• Y

• W

• X

• Z

Multiple Choice

Which letter shows where kinetic energy is at is highest point?

• X

• Y

• W

• Z

Multiple Choice

Energy that transforms from potential to kinetic is neither_____ nor _______.

• created, force

• created, destroyed

• force,motion

• destroyed, law of conservation of energy

Multiple Choice

Where on this diagram would gravitational potential energy be at its highest?

• W

• X

• Y

• Z

Multiple Choice

Where on this diagram would kinetic energy be at its highest?

• W

• X

• Y

• Z

Multiple Choice

How will this object move?

• It will not move

• It will move in both directions

• It will move to the right

• It will move to the left

Multiple Choice

How will this object move?

• It will not move

• It will move in both directions

• It will move to the right

• It will move to the left

Multiple Choice

Shadell pushes a box 35 N to the right. Nazai pushes the box 25 N in the same direction. What is the net force?

• 60 N balanced to the right

• 10 N balanced to the right

• 60 N unbalanced to the right

• 10 N unbalanced to the right

Multiple Choice

What are unbalanced forces?

• forces that are not equal in size and opposite in direction.

• forces that are equal in size and opposite in direction.

Multiple Choice

What is net force?

• 10 N left

• 0 N

• 10 N right

Fill in the Blanks

Multiple Choice

Which of the answer choices is not a characteristic of a balanced force?

• no change in motion

• moving at a constant speed

• causes a change in motion

• net force of zero

Multiple Choice

If forces are going in the same direction, you should

• add the forces

• subtract the forces

• multiply the forces

• divide the net force

Multiple Choice

You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?

• 60 N right
• 10 N left
• 60 n right
• 50 N left

Multiple Choice

A wheeled cart is moving to the right at a constant speed.  Two forces of equal magnitude are acting upon the cart. Which of the following best describes the forces and motion of the cart?

• Balanced Forces, Constant Speed
• Balanced Forces, Acceleration
• Unbalanced Forces, Constant Speed
• Unbalanced Forces, Acceleration

Multiple Choice

The unit for force is a called a: 

• Galileo
• Newton
• Aristotle

Multiple Choice

Which diagram below best describes the PE and KE at #1 on the picture?

Fill in the Blanks

Multiple Choice

An 10 kg object is moving with an acceleration of 2 m/s squared. What is the force of the object? (F=ma)

• 20 N

• 10 N

• 2 N

• 5 N

Multiple Choice

A 5 kg object is moving with an acceleration of 2 m/s squared. What is the force of the object? (F=ma)

• 20 N

• 10 N

• 2 N

• 5 N

Multiple Choice

A 10 N force is on a 2 kg object. What is the acceleration of the object? (a = F/m)

• 5 m/s squared

• 20 m/s squared

• 10 m/s squared

• 1 m/s squared

Multiple Choice

A 20 N force is on a 5 kg object. What is the acceleration of the object? (a = F/m)

• 5 m/s squared

• 4 m/s squared

• 10 m/s squared

• 20 m/s squared

Multiple Choice

A -8 N force is on a 4 kg object. What is the acceleration of the object? (a = F/m)

• 5 m/s squared

• 4 m/s squared

• -10 m/s squared

• -2 m/s squared

Multiple Choice

A 10 N force is causing a 10 m/s squared acceleration on an object. What is the mass of the object? (m = F/a)

• 10 kg

• 1 kg

• 2 kg

• 20 kg

Multiple Choice

A 6 N force is causing a 2 m/s squared acceleration on an object. What is the mass of the object? (m = F/a)

• 3 kg

• 12 kg

• 2 kg

• 20 kg

Multiple Choice

A 10 N force is causing a 2 m/s squared acceleration on an object. What is the mass of the object? (m = F/a)

• 3 kg

• 12 kg

• 5 kg

• -5 kg

Multiple Choice

A -10 N force is causing a -2 m/s squared acceleration on an object. What is the mass of the object? (m = F/a)

• 3 kg

• 12 kg

• 5 kg

• -5 kg

Multiple Choice

Use your knowledge of science to answer the question.  The frog leaps from its resting position at the lake's bank onto a lily pad. If the frog has a mass of 0.5 kg and the acceleration of the leap is 3 m/s2, what is the force the frog exerts on the lake's bank when leaping?

• 0.2 N

• 0.8 N

• 1.5 N

• 6.0 N

Multiple Choice

A 1,000 kg truck moving at 10 m/s runs into a concrete wall. It takes 0.5 seconds for the truck to completely stop. What is the magnitude of force exerted on the truck during the collision?

• 1,000 N

• 5,000 N

• 10,000 N

• 20,000 N

Multiple Choice

A force of 90N is applied to each cart below, which one will accelerate the fastest?

• Cart 1
• Cart 2
• Cart 3 
• Cart 4

Multiple Choice

If you increase the mass on an object, its acceleration

• decreases
• stays the same
• also increases
• stops

Multiple Choice

Something with a greater mass requires a(n) _____ force to move it. 

• greater
• lesser
• equal
• opposite

Multiple Choice

According to Newton's second Law, which would take more force to slow down?

• The truck

• The car

• They would both take the same force

• Cannot be determined

Multiple Choice

The stronger the force, the ________ the acceleration

• stronger

• weaker

Multiple Choice

Which shopping cart will have more acceleration?  

• The empty shopping cart
• The shopping cart that's full
• They will be the same

Multiple Choice

For this question, refer to the image to the left...

The larger the ___________ of an object, the greater the ____________ needed to change the direction or the speed.

• mass / tow truck

• suitcases / force

• mass / force

• windows / force

Multiple Select

List the three (3) possibilities that an object might demonstrate when subjected to an unbalanced force:

(You must choose 3 answers)

• Speed Up

• Leave Our Atmosphere

• Slow Down

• Levitate In The Air

• Change Direction