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Grade 6: Physical Sciences – Electricity Created by Kshamta Hunter and Marina Milner-Bolotin

Grade 6: Physical Sciences – Electricity Created by Kshamta Hunter and Marina Milner-Bolotin Email: marina.milner-bolotin@ubc.ca kshamta@interchange.ubc.ca. Questions 1a: Elements of a Circuit. Which element of a circuit is responsible for turning it on or off? Bulb Battery Switch

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Grade 6: Physical Sciences – Electricity Created by Kshamta Hunter and Marina Milner-Bolotin

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  1. Grade 6: Physical Sciences – Electricity Created by Kshamta Hunter and Marina Milner-Bolotin Email: marina.milner-bolotin@ubc.cakshamta@interchange.ubc.ca

  2. Questions 1a: Elements of a Circuit Which element of a circuit is responsible for turning it on or off? • Bulb • Battery • Switch • Resistor • Wire

  3. Questions 1b: Elements of a Circuit Which element of a circuit is responsible for supplying energy to the circuit? • Bulb • Battery • Switch • Resistor • Wire

  4. Questions 1c: Elements of a Circuit Which element of a circuit is responsible for connecting different elements of the circuit (completing it)? • Bulb • Battery • Switch • Resistor • Wire

  5. Questions 1d: Elements of a Circuit Which of the following elements converts electrical energy into heat under normal conditions? • Bulb • Battery • Resistor • Both A and B • Both A and C

  6. Questions 2a: Circuit Diagrams What does A stand for? • Battery • Light bulb • Wires • Switch B A C B B D

  7. Questions 2b: Circuit Diagrams What does B stand for? • Battery • Light bulb • Wires • Switch B A C D B B

  8. When the switch is closed, which one of the circuits will have the light on? (ASSUMING ALL CONNECTIONS ARE MADE CORRECTLY) Questions 2c: Circuits 4 1 3 2 • 1 only • 1 and 2 only • 1, 2 and 3 only • All of them • None of them will turn the light bulb on

  9. Questions 2d: Circuit Diagrams Which of the circuits below corresponds to the circuit above? • Circuit A • Circuit B • Both circuits • None of them Battery A Light bulb B Wire

  10. Questions 3a: Series and Parallel Circuits Which of these circuits is a series circuit and which one is a parallel circuit? • A – series; B - parallel • A- parallel; B - series C. Both are series D. Both are parallel E. Depends on the battery Battery A Light bulb B Wire

  11. Question 3b: Series Circuits Two identical light bulbs are connected in a series circuit as shown in the diagram. How will the bulbs’ brightness compare to each other? A B • Bulb A will be brighter than bulb B • Bulb B will be brighter than bulb A • The bulbs will be equally bright • Bulb A will be lit and bulb B won’t • Bulb B will be lit and bulb A won’t

  12. Question 3c: Parallel Circuits Two identical light bulbs are connected in a parallel circuit as shown in the diagram. How will the bulbs’ brightness compare to each other? • Bulb A will be brighter than bulb B • Bulb B will be brighter than bulb A • The bulbs will be equally bright • Bulb A will be lit and bulb B won’t • Bulb B will be lit and bulb A won’t B A

  13. Question 3d: Series and Parallel Circuits Two identical light bulbs are connected first in a series circuit and then in a parallel circuit as shown in the diagrams. In which circuit will the bulbs be brighter? • The bulbs will be brighter in series circuit. • The bulbs will be brighter in parallel circuit. • The bulbs will be equally bright in series and parallel circuits. B A B A

  14. Question 4a: Electron Flow through a Circuit In the following circuit, 100 electrons flow out of the battery towards light bulb A. How many electrons will enter light bulb A? HOW CAN YOU IMPROVE THIS QUESTION? WHY? • Exactly 100 Electrons • About 90 Electrons • About 75 Electrons • About 25 Electrons • No Electrons A B

  15. Question 4b: Electron Flow through a Circuit In the following circuit electrons flow out of the battery towards light bulb B. Then they flow towards light bulb A. Which bulb will have more electrons flowing through it? A B • Bulb A • Bulb B • Same • Impossible to determine

  16. Question 5a: Brightness of a light bulb What determines the brightness of a light bulb? • Voltage across it • Current through it • Its Resistance • All of the above

  17. Question 5b:Brightness of a light bulb What would you do if you wanted to increase the rate at which electrons (the blue dots) are flowing from the battery to the light bulb? • Increase Resistance and decreases Voltage • Increase Resistance and increase Voltage • Decrease Resistance and increase Voltage • Decrease Resistance and decrease Voltage

  18. Question 5c:Current What is electric current? • It is the measure of the brightness of a light bulb • It is the strength of a battery or the power supply • It is the number of electrons that flow from a battery • It is the number of electron flowing at a given time from a battery • All of the above

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