Science 8 Quick Quiz: Weather, Energy & Life

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Medium: Key science concepts

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RUBY UPHOFF

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Science 8 Quick Quiz: Weather, Energy & Life


Froggy Jumps Science 8 Quick Quiz: Weather, Energy & LifeVersión en línea Medium: Key science concepts por RUBY UPHOFF 1 What is a pure substance made from only one type of atom, represented on the periodic table by a chemical symbol? a Element b Mixture c Compound 2 What term describes a pure substance made from two or more different atoms in a set ratio? a Element b Mixture c Compound 3 In H2O, what does the coefficient 2 indicate? a The number of hydrogen atoms b The number of water molecules c The number of oxygen atoms 4 According to the Law of Conservation of Mass, in a closed system the total mass of reactants equals the total mass of what? a Substances not involved in the reaction b Energy c Products 5 If two forces act in opposite directions, how is the net force determined? a Subtract and use the larger force b Ignore one of the forces c Add them 6 Speed is defined as what ratio? a Mass divided by velocity b Distance divided by time c Time divided by distance 7 How does biodiversity relate to sustainability in ecosystems? a Biodiversity has no effect on sustainability b Less biodiversity improves sustainability c More biodiversity increases sustainability 8 What is the difference between primary and secondary succession? a Primary starts from rock; secondary starts from soil after disruption b Primary occurs only on land; secondary only in water c Primary uses water; secondary uses air 9 Why does the sun’s energy driving convection affect weather patterns? a It heats the atmosphere and hydrosphere b It stops wind formation c It cools the oceans 10 What percent of energy is typically transferred from one trophic level to the next in ecosystems? a About 90% b About 50% c About 10%

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Science 8 Quick Quiz: Weather, Energy & Life

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Science 8 Quick Quiz: Weather, Energy & LifeVersión en línea

por RUBY UPHOFF

What is a pure substance made from only one type of atom, represented on the periodic table by a chemical symbol?

What term describes a pure substance made from two or more different atoms in a set ratio?

In H2O, what does the coefficient 2 indicate?

According to the Law of Conservation of Mass, in a closed system the total mass of reactants equals the total mass of what?

If two forces act in opposite directions, how is the net force determined?

Speed is defined as what ratio?

How does biodiversity relate to sustainability in ecosystems?

What is the difference between primary and secondary succession?

Why does the sun’s energy driving convection affect weather patterns?

What percent of energy is typically transferred from one trophic level to the next in ecosystems?