Physics Formative 2nd Semester 7th Grade

1. When a spring is stretched it obeys Hooke’s law.

Which of the following graphs shows that a spring obeys Hooke’s Law?

• 
• 
• 
• 

Which arrow, A, B, C or D, shows the two complete oscillation?

• A

• B

• C

• D

Tick the correct answer according to the statement

• True
  
  True

• True
  
  False

• False
  
  False

• False
  
  True

1. Which of the following statements is incorrect ?

• Fossil fuel is nonrenewable energy resource

• Biofuel is nonrenewable energy resource

• Wind turbine is renewable energy resource

• Airborne wind turbine is renewable energy resource

1. What is the correct unit of frequency?

• seconds
• Herdz

• Hertz

• Heartz

1. The diagrams show two sound waves.

The scales on each diagram are the same.

 Pick the most suitable wave that represents these category..

A. Lower Frequency ( A / B )

B. Shorter Wavelength  ( A / B )

• Lower Frequency : A

                         

  Shorter Wavelength : A

• Lower Frequency : A

                         

  Shorter Wavelength : B

• Lower Frequency : B

                         

  Shorter Wavelength : B

• Lower Frequency : B

                         

  Shorter Wavelength : A

Which of A, B, C or D, represent a hearing range for humans?

• B
• A
• C
• D

1. A whale has a mass of 20.000 kg.

 

Calculate the weight of the ship if the gravitational field strength on Earth is 10 N/kg.

 

Use this equation weight = mass × gravitational field strength

 

 

 weight = .............................................................. N

1. The diagram shows a simple electric circuit.

Use terms below to complete these!

Terms :

chemical energy                     electricity

potential energy            Kinetic energy           

light waves    

a. The action of switch moving requires energy as ...................................................................

 

b. The bulb transfers energy to the surroundings by ...............................................

(a). Explain 1 different part between microphone and human ear!

 

(b). Explain the similar purpose between microphone and human ear!