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Questions and Answers
What is the atomic mass of Potassium?
What is the atomic mass of Potassium?
Which group does Fluorine belong to in the periodic table?
Which group does Fluorine belong to in the periodic table?
What charge does an electroscope receive when a positively charged object is brought close?
What charge does an electroscope receive when a positively charged object is brought close?
Which of the following is a characteristic of a series circuit?
Which of the following is a characteristic of a series circuit?
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What is the main difference between static electricity and current electricity?
What is the main difference between static electricity and current electricity?
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Which substance pairs would likely induce the strongest charges when rubbed together?
Which substance pairs would likely induce the strongest charges when rubbed together?
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How is voltage measured in an electric circuit?
How is voltage measured in an electric circuit?
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What is the primary role of a conductor in an electric circuit?
What is the primary role of a conductor in an electric circuit?
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Which of the following formulas corresponds to Sodium bicarbonate?
Which of the following formulas corresponds to Sodium bicarbonate?
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What is the number of neutrons in Iron based on the atomic information provided?
What is the number of neutrons in Iron based on the atomic information provided?
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What defines abiotic factors in an ecosystem?
What defines abiotic factors in an ecosystem?
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Which of the following accurately describes biodiversity?
Which of the following accurately describes biodiversity?
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Which term describes the role of a species in its environment?
Which term describes the role of a species in its environment?
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What is the primary characteristic of a carnivore?
What is the primary characteristic of a carnivore?
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What is one possible consequence of deforestation?
What is one possible consequence of deforestation?
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What is the function of decomposers in an ecosystem?
What is the function of decomposers in an ecosystem?
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How do invasive species typically affect native ecosystems?
How do invasive species typically affect native ecosystems?
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What is the definition of cellular respiration?
What is the definition of cellular respiration?
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Which component makes up the largest part of the biosphere?
Which component makes up the largest part of the biosphere?
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What is meant by the term 'carrying capacity'?
What is meant by the term 'carrying capacity'?
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What is the primary difference between series and parallel circuits?
What is the primary difference between series and parallel circuits?
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Which method is primarily used to charge an object by friction?
Which method is primarily used to charge an object by friction?
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What distinguishes conductors from insulators in an electric circuit?
What distinguishes conductors from insulators in an electric circuit?
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How is current defined in the context of electricity?
How is current defined in the context of electricity?
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Which of the following scenarios best exemplifies charging an electroscope?
Which of the following scenarios best exemplifies charging an electroscope?
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Study Notes
Electricity Unit
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Static electricity differs from current electricity. Static electricity involves a buildup of charge, while current electricity involves a flow of charge.
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Charging by friction occurs when rubbing two different materials together causes one to gain electrons and the other to lose electrons.
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Electrostatic series helps determine resulting charge of materials rubbed against each other (e.g., glass and silk). Glass gains a positive charge, and silk gains a negative charge when rubbed together
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Charging by conduction involves transferring charge by direct contact, as in touching a doorknob after walking across a carpet.
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The law of electric charges states like charges repel, and unlike charges attract. A neutral object has an equal number of positive and negative charges.
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Electric circuits consist of four parts: a source (battery), a load (lightbulb), wires, and a switch, though not always required.
- Voltage is the energy given to electrons by the battery, measured in volts (V).
- Voltage in a series circuit is split among the loads.
- Voltage is the same in each path of a parallel circuit.
- In a series circuit, if one light bulb is unscrewed or burns out, the second light bulb will not light.
- In a parallel circuit, if one light bulb is unscrewed or burns out, the second light bulb will light.
- Current is the rate of flow of electrons, measured in amperes (A).
- Current in a series circuit is the same throughout the circuit.
- Current in a parallel circuit splits, with the total current equaling the sum of the currents in each path.
Chemistry Unit
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Elements are identified by their atomic number, atomic mass, number of protons, neutrons, and electrons.
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Bohr-Rutherford diagrams illustrate the atom's structure including protons and neutrons in the nucleus, and electrons in orbits (shells) around the nucleus. Atomic diagrams show the arrangement in these orbits.
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Formulas for compounds are based on the ratios of atoms in a substance as in, for example, sodium bicarbonate(NaHCO3) and acetylsalicylic acid (C9H8O4).
Ecology Unit
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Abiotic factors are non-living components of an ecosystem, e.g., sunlight, water, temperature.
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Biodiversity is the variety of life in a particular habitat or ecosystem.
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Biosphere encompasses all living organisms on earth.
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Ecology studies the interactions between organisms and their environment.
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Community is a group of organisms of different species living together in a particular area.
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Extinct means a species no longer exists.
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Ecosystem includes all living and non-living things, e.g., a forest, a pond.
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Habitat is the natural environment of an organism.
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Species is a group of organisms closely related and capable of interbreeding.
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Food chains and food webs show how energy and matter flow through an ecosystem.
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Trophic levels are feeding positions in a food chain, from producers to top consumers.
- Invasive species can damage ecosystems.
- Producers are organisms that produce their own food, such as plants.
- Consumers are organisms that obtain energy by consuming other organisms.
- Decomposers are organisms that break down dead or decaying matter.
General Science
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Photosynthesis is the process where plants use sunlight and water to produce their own food from carbon dioxide. The word equation for photosynthesis: Carbon dioxide + Water → Glucose + Oxygen.
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Cellular respiration is the process in which organisms break down glucose to release energy. The word equation is: Glucose + Oxygen → Carbon dioxide + Water.
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Biodiversity is essential to protect, as it supports many functions within the environment and ecosystem.
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Some energy sources are non-renewable (e.g., fossil fuels), whereas others are renewable (e.g., solar).
Density Calculations
- Density is calculated using mass divided by volume (mass/volume), examples of such calculations are given in this image.
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Description
Test your knowledge on static and current electricity, including methods of charging and the law of electric charges. This quiz covers key concepts needed to understand electric circuits and the behavior of charged materials. Ideal for students studying electricity in science classes.
