6.3/7.1 Objectives Flashcards
Explain the different First Nations explanations for lightning.
Lightning is caused by two powerful objects crashing together. Uncontrolled Lightning is caused by fletching Thunderbirds learning to fly and controlling their power. Thunderbird is a physical and spiritual entity with eyes that blink lightning and a cry that is thunder.
Explain indigenous beliefs and attitudes about lightning
They deeply respect lightnings power. Lightning strikes the ground to awaken the plants to grow during spring. Reminder to be humble to it
Explain purpose of a lightning rod and explain exactly how it works
Provides pathway for lightning via transfer of electrons to reach the ground harmlessly without bringing the structure down. This is possible because the lightning rod is highly conductive.
Explain the different ways that static electric charges are grounded to prevent problems
Ground straps for ground vehicles because they provide a pathway for built up electrons to travel safely to the ground. Airplanes have static discharge rods or wicks because the force of repulsion between charges is so strong that charges disperse into the air.
Explain some technologies or processes that gave been developed which use static electric chargers in helpful ways.
- In spray painting, induce the surface of the car to be positively charged. Induce the paint coming out to be negatively charged through friction. 2. Purify and sort materials: ore separation in mining, plastics, paper recycling, settling of fine particles suspended in water.
Explain how an electrostatic precipitation works and how it benefits the environment.
In an electrostatic precipitator, charge the particulate negatively and pass it through positively charged collector plates. It removes dust and other particulate matter from the air. It also purifies and sorts materials.
Explain how fuel cells work, their advantages over fossil fuels and how they’re being used
Fuel cells generate electrical energy from a chemical reaction with a fuel. Advantage: no pollution. It’s being used by powering electric buses
Explain what an electrical circuit is and what current electrical energy is
In an electrical circuit, electric charges will flow from an energy source through a complete path. It includes an energy source, a conductor, and a load. Current electrical energy is the flow of electric charge in a circuit.
Explain the parts of an electrical circuit
Energy source: converts non electrical energy to electrical energy. Conductor: it provides a pathway for electrons to flow. Load: it converts electrical energy to a different form of energy. Switch: a device that turns the circuit on or off by opening or closing the circuit. Resistor: it slows current flow in a circuit.
Explain the parts of an electrochemical cell and how they work
Electrolyte: a liquid or paste that conducts electricity due to the presence of ions. Electrode: two metal strips that Muir negatively charged react with the electrolyte. Due to the chemical reaction between them, electrons will collect on one of the electrodes, making it negatively charged. The other electrode has lost electrons making it positively charged.
