Exam Example of Grade 9 Science (Hands on Component at End of Exam)

Science 9 – Electricity Exam

Matching

Match the correct term to the definition or sentence on the right. 

____ Current

____ Voltage

____ Series circuit

____ Repel

____ Friction

____ Attract

____ Conductor

____Parallel circuit

____ Insulator

____ Switch

____ Load

____ Grounding

____ Ohm

____ Resistance

____ Electrical discharge

1. 1. Resistance is measured in these.
   2. The degree to which a substance slows down the flow of electric current through it
   3. The flow of an electrical charge through a circuit.
   4. A material that allows the flow of electrons to pass through it.
   5. Process of connecting a wire to the Earth’s surface for lightning.
   6. An electric circuit in which devices are arranged in parallel paths.
   7. A device that turns a circuit on or off by closing or opening the circuit.
   8. A material that stops the flow of electrons.
   9. A device that converts electrical energy to another form of energy.
   10. The difference in electrical energy between two points in a circuit.
   11. Particles with similar charges _______________ each other.
   12. Electric charges are transferred very quickly (ex: is a spark)
   13. Occurs when objects rub against each other.
   14. An electric circuit in which the components are arranged one after another.
   15. Particles with opposite charges ________________ each other.
       

1. Multiple Choice

1. What is coal made out of?   _______
   1. dead organisms (animals)
   2. dead plants
   3. living organisms
   4. living plants
2. which of the following gain electrons? ______
   1. air
   2. glass
   3. styrofoam
   4. human hair

1. Lighting strikes when ______
   1. negative charges at the bottom of a cloud are attracted to negative charges on the ground
   2. negative charges at the bottom of a cloud are attracted to positive charges on the ground
   3. positive charges at the bottom of a cloud are attracted to positive charges on the ground
   4. None of the above

1. What does this symbol stand for?
   1. load (light bulb)
   2. resistor
   3. fuse
   4. cell

1. What is an example of biomass energy?
   1. dead organisms (animals)
   2. sun light
   3. coal
   4. water

1. Which parlice moves around the atom?
   1. protons
   2. neutrons
   3. atommites
   4. Electrons

1. When two or more cells are put together, we call this a
   1. load
   2. volt
   3. wire
   4. battery

1. if one bulb breaks the whole circuit and the bulbs go out,
   1. series circuit
   2. parallel circuit
   3. optimal circuit
   4. linear circuit

1. the degree of which a substance opposes the flow of electric current through it
   1. current
   2. insulator
   3. resistance
   4. circuit

1. a material that allow the flow of electrons  and electric current to pass through it
   1. insulators
   2. electric current
   3. ground
   4. conductor

1. Short Answer  

1. What are the three subatomic particles of an atom and their charges? Write the name of the particle and circle the correct charge. 
   1. __________________   positive negative   neutral
   2. __________________   positive negative   neutral
   3. __________________   positive negative   neutral
2. Moving around the nucleus are even smaller particles called _____________            
3. Classify each of the following as either a conductor or an insulator: 

Copper, rubber, iron, plastic, wood, water
Conductor	Insulator

 

1. When we completed the Static Electricity lab, why did the can follow the rod? COMPLETE SENTENCE! 
2. A tablesaw in the woodshop is rated 1200W. It is used about 6 hrs/day at a rate of 13.740 ¢/kwh. What is the cost of using the table saw per week?                Cost = Power x Time x Rate   
3. What is electron buildup on clothes from the dryer called?  How do you get rid of it? Explain what happens to the electrons. COMPLETE SENTENCES! 
4. Why is a car a safe spot in a storm? COMPLETE SENTENCE! 
5. How do First Nations and Metis people explain uncontrolled lightning?  COMPLETE SENTENCE!
6. Why should you not swim during a lightning storm? COMPLETE SENTENCE! 
7. What are two things that must be present in order for a circuit to work properly? 

1. __________________________________________________________________
2. __________________________________________________________________

 

1. Draw a SERIES circuit that contains 2 batteries, a bell, a light, and a switch. 

1. Draw a PARALLEL circuit that contains two batteries and three lights.

1. Use Ohm’s Law to answer the following question: A 30 V battery generates a current through a 15Ω resistor.  How much current does the battery generate? 

V =

I =

R =

1. Use Ohm’s Law to answer the following question: A current of 2 A flows through a 40Ω resistor in a circuit.  Calculate the voltage.

V =

I =

R =

D. True or False 

______ 1.  A battery converts mechanical energy to electrical energy.

______ 2.  An insulator allows electricity to flow very easily.

______ 3. Similar charges repel each other.

______ 4. In static electricity electrons are transferred by rubbing two objects together.  

______ 5. Opposite charges attract each other.

______      6. In a series circuit the bulbs grow dimmer as more batteries are added.

______ 7. There is more than one pathway for current to flow in a series circuit.

______ 8.  D.C. stands for Direct Current.

______ 9.  A load changes electrical energy to another form of energy.

______ 10. If there is a break in a parallel circuit the flow of electrons will stop and nothing will work.

Circuit Boards

Using the diagrams below, draw the circuit (use your pencil to draw the wires) that completes the following circuits:

1. Create a series circuit using one battery, one light and a switch.
2. Create a parallel circuit using one battery and two lights.
3. Create a series circuit using two batteries and one light.
   1. What will happen to the light if you used three batteries?  Explain your reasoning.

1.  Create a Circuit on board in the back of the room.