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Static Electricity.

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Presentation on theme: "Static Electricity."— Presentation transcript:

1 Static Electricity

2 Static Electricity (pp. 7-14)
Define static electricity? What does static mean? (p. 7) What are the two types of charges? What symbol is used for each type of charge. (p. 10) What does the neutral refer to? (p. 10) Define like and unlike charges. Give an example.(p. 11) List the three ways charged and uncharged objects behave? (p. 11) What elements rub together to create static electricity in a thundercloud? What does this result in? (p. 12) Why does lightning tend to strike tall buildings and tall trees? (p. 13)

3 Static Electricity (pp. 7-14)
Static electricity is the build-up of electric charges on the surface of an object. Static means not moving. The two types of charges are negative (-)and positive (+). Neutral refers to an object that does not have a charge. Like charges are two charges of the same type. Example: two positive or two negative charges. Unlike charges are two charges that are different. Example: one negative and one positive. Charges behave in three ways 1. Unlike charges attract. 2. Like charges repel. 3. Charged objects attract uncharged (neutral) objects. Water droplets and ice particles rub together to create lightning. Lightning takes the shortest route between the negatively charged side of the cloud and the positively charged area of ground.

4 Current Electricity

5 Current Electricity (pp. 15-21)
Define current electricity? (p. 15) What is the difference between conductors and insulators?(p. 18) Which type of air is a better conductor of electricity? (p. 18) List 3 examples of good conductors, fair conductors and insulators. (p. 18) What does it mean to ground an object? (page 19) Why can’t you use static electricity to power electronic devices? (p.20)

6 Current Electricity (pp.15-21)
Current electricity is when charges move through an object. Conductors are materials that let charges flow through them easily. Insulators are materials that block the flow of charges. *You can build static electricity only on objects that are insulators. Humid air is better conductor of electricity. Aluminum, copper and gold are good conductors. Carbon, earth, and the human body are fair conductors. Cotton, rubber and glass are all insulators. To ground an object means to connect it through a conductor to the ground or Earth to prevent the build-up of electric charges by removing the extra charge. Electric devices require a steady flow of electricity, static electric can produce only a one-time burst of electricity.

7 Electric Currents

8 Electric Current (pp. 22-32)
Define an electric circuit? (p. 22) What are the three basic components of an electric circuit? What roles does each component play? (p. 22) What is the difference between a closed circuit and an open circuit. (p. 23) What additional component can be used to control the flow of current in an electric circuit. (p. 23) What term refers to the uncontrolled flow of electricity through a closed circuit? (p. 24) What are the signs of a short circuit? (p. 24) Describe the two ways circuits can be arranged. Include a diagram of each arrangement. (pp ) What is the result of adding more loads to a circuit? More sources? (p. 29) How is the amount of push exerted by batteries affected when they are wired in series? In parallel? (p. 31)

9 Electric Current (pp. 22-32)
An electric circuit is a complete pathway for the flow of electricity. The three basic components of an electric circuit are the source, a conductor, and a load. A source (a battery) provides the push that causes electricity to more through the circuit. A conductor (usually wire) carries the electricity. A load (a light bulb or a buzzer) is any component that uses the electricity. A closed circuit is an unbroken pathway, while an open circuit has a gap or break along the path that does not allow electricity to flow. A switch controls the flow of electric current. A hazard refers to the uncontrolled flow of electricity through a closed circuit. A hot or smoking conductor are the signs of a short circuit. A series circuit is a single pathway from the source to the load. A parallel circuit has more than one complete pathway which can power many electrical devices. Adding more load to a circuit will decrease the current, while adding more sources will increase the total current in a circuit. Batteries added in series increases the push by the number of batteries added, batteries will be used up faster. Adding Batteries in parallel does not increase the push. It is same as the push of one battery, though the batteries will last longer.

10 Power to You

11 Using Electricity (pp. 36-39)
Name the three forms of energy that can be produced by electrical energy? (p. 36) Define electromagnetism? (p. 37) What can we use electromagnets for?. (p. 39) Using Electromagnetic Connection to Generate Electricity(pp ) List and describe the three main ways electricity is generated in Canada. (p.42)

12 Using Electricity (pp. 36-39)
Electricity can be changed to light, sound, heat and magnetism. Electromagnetism is magnetism produced by electricity. We can use electromagnets to convert electrical energy into motion. Using Electromagnetic Connection to Generate Electricity(pp ) The three main ways electricity is generated in Canada are: Hydo-electric: uses the water energy of falling water to spin a turbine. Fossil Fuel: converts the energy of burning fossil fuels (mainly coal) in to heat that boils water into steam to spin a turbine. Nuclear: converts energy release from a nuclear reaction into heat that boils water into steam to spin a turbine.

13 Power to You

14 Renewable Sources of Electricity (pp. 44-48)
Compare renewable and non-renewable sources of electricity. (p. 44) Define the five types of renewable energy sources. (pp ) Consuming and Conserving Electrical Energy (pp.49-52) What is the purpose of an electric meter. (p.49) What is power? (p.49) Define energy consumption. (p.50). Define energy consumption, energy efficiency and energy conservation. (p.50)

15 Renewable Sources of Electricity (pp. 44-48)
A renewable source of energy is one that can renew or replace itself like hydro-electricity. Non-renewable sources cannot be replaced within a human lifeline like fossil fuels and nuclear energy. . (p. 44) The five types of renewable energy sources are: Solar energy is energy from the sun Wind energy is energy from moving air Tidal energy is moving water in tides Geothermal energy from the Earth’s crust Biomass energy is energy stored in plant and animal tissues.

16 Consuming and Conserving Electrical Energy (pp.49-52)
An electric meter monitors the amount of electricity used by your household. Power is the rate at which electrical energy is transformed into a useable form such as heat, light, or motion. Energy consumption is the amount of energy we use. Energy efficiency describe using less energy or electricity to accomplish the same task. Energy conservation describes doing without certain things to save electricity.

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