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Ecology
Chemistry
Electricity
Astronomy
Mixer
100
Use of Earth's resources, including land and water, at levels that can continue forever.
What is sustainability
100
The smallest particle of an element that retains the identity of the element.
What is an atom.
100
What is the resistance of a load in a circuit that has a total current of 2.5 A and the load uses 10V.
What is 4 ohms.
100
Distinguish between absolute and apparent magnitude of a star.
What is absolute magnitude is the actual brightness of a star and apparent magnitude is how a bright a star is based on how close it is to Earth.
100
Spins in order to turn a generator in electricity production.
What is turbine (not turbin).
200
Give and explain how two abiotic and two biotic factors affect population sizes.
What are 1. Abiotic: amount of sunlight and water determine plant growth and Biotic: number of prey and predators will determine consumer populations (other answers possible)
200
A pure substance than cannot be broken down into simpler parts by chemical methods.
What is an element.
200
Draw a circuit diagram illustrating how you would build a parallel circuit with a battery, 3 lightbulbs and a switch that controls only one of the lightbulbs.
What is (see diagram).
200
What is the big bang theory? Provide one piece of evidence to support this theory.
What is the idea that an event "the big bang" triggerred the expansion of the universe 14 billions years ago. Evidence: Redshifting & remnants of CMB (Cosmic Microwave Background) Radiation.
200
Order the following by increasing size: constellation, galaxy, solar system, star
What is star, constellation, solar system, galaxy
300
Define nitrogen fixation and outline two methods of how nitrogen is fixed.
What is converting nitrogen as N2 in the atmosphere to a form that plants can use. Nitrogen fixing bacteria and lightning.
300
How many atoms of each element in the following formula: 3Al2(CO3)3
What is 6 aluminum, 9 carbon and 27 oxygen atoms
300
Distinguish between an insulator and a conductor and give an example of each.
An insulator is a material that holds onto its charge in one place- e.g. a balloon. A conductor is a material that allows charges to flow through readily- e.g. most metals.
300
Describe three differences between stars and planets.
What are 1) planets do not undergo nuclear fusion whereas stars do 2) stars are generally larger and hotter 4) stars give off light whereas planets do not.
300
What are three disadvantages of nuclear power?
What are it gives off radioactive waste, it is non-renewable, and it is expensive to build.
400
State two consequences of the decrease in salmon in a temperate rainforest ecosytem.
What are loss of food for bears and loss of soil nutrients as bears eat salmon and excrete waste that fertilizes the soil.
400
Draw the Bohr-Rutherford diagram for the sulfide ion.
What is (diagram should include 16 protons, 16 neutrons, and 18 electrons in three shells).
400
When a load is added to a series circuit, explain what would happen to the total current and total voltage..
What is the current would decrease as there is now more resistance. The voltage would stay the same but now each load would get less since they are splitting the total voltage.
400
What is the difference between a meteor and a meteorite?
What is a meteorite is the remnants of a meteor that did not burn up in the atmosphere.
400
What are three key natural processes in the carbon cycle.
What is photosynthesis, respiration and decomposition (could also say dissolution).
500
Write out the balanced chemical equation for photosynthesis.
What is 6CO2 + 6H2O --> C6H12O6 + 6O2 + energy
500
Distinguish between ionic and covalent/molecular compounds in terms of the electrons making the bonds and given an example of each that is composed of the element chlorine.
What is ionic compounds transfer their valence electrons from metal to non-metal whereas covalent compounds share their valence electrons. e.g. ionic: NaCl covalent: ClO
500
Describe with a series of diagrams how you would use a pith ball electroscope to determine the charge of an unknown rod.
What is What is 1) Bring the unknown charged rod close to a neutral pithball- if they do not attract, rod is neutral. If they do attract, let them touch so unknown charge from rod goes to pithball. 2) Bring a rod with a known charge towards the charged pithball- using laws of electric charges, one should be able to determine the unknown charge.
500
What is redshifting? What instrument is used by astronomers to study this phenomenon?
What is the the effect in which objects moving away from an observer have their wavelengths lengthened, toward the red end of the visible spectrum. Instrument used is a spectroscope.
500
List four different types of consumers and an example of each.
What is 1. Detritivore e.g. dung beetle, fly, earthworm 2. omnivore: an organism that eats both produces and primary consumers e.g. bears, birds 3. herbivore: an organisms that only eats producers e.g. rabbit, deer 4. Carnivore: An organism that only eats other consumers e.g. wolf, coyote