Current electricity Static electricity Charged particles Conductors Insulators
What is Electricity? Learning Intentions
In this topic we are learning to: z Demonstrate that electricity is a form of energy. z Investigate the differences between conductors and insulators. z Distinguish between static and current electricity.
Electricity is a form of energy. We know it is a form of energy because it can be converted into other forms of energy and because it can cause objects to move.
Fig. 18.2.1
Electricity can be converted into other forms of energy. Can you identify the energy transfers taking place in these two pictures?
Prove it!
Work with your lab partner to plan, design, carry out and write up investigations to test the following hypotheses:
z Electricity can be converted to other forms of energy. z Electricity can move things.
Before you begin, write a prediction of what you think the outcome of each investigation will be. After you record your observations, explain why you think they did or did not match your predictions. In each case, list the energy conversions taking place.
F
The electricity needed to light up the Las Vegas strip each night could provide enough power for a town of 25,000 residents.
310 310 How much?
1. Work in groups of three to calculate the total amount of time all the students in your class use the following items on a daily basis: z Mobile phone
z Television z Laptop or tablet computer
2. Present your results in an appropriate way on a poster. 3. Do you think your figures are accurate? Why/why not? 4. Did any of the results surprise you? Which ones? Why?
Safety note: do not turn on any electrical power source without asking your teacher to inspect your work first.
