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CA #2 Review

Quiz by Sharon Huizar

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36 questions
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  • Q1
    In some areas of science, scientist do fieldwork instead of a laboratory work. For which investigation requiring fieldwork, would a scientist need to make observations using this tool?
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    The study of plant distribution
    The study of atomic particles
    The study of nesting birds
    The study of tree growth rings
  • Q2
    In recent decades, average global temperatures have increased significantly. The cause or causes of these increases are being investigated. Some people say that widespread destruction of the Amazon rain forest contributes to global warming. Which mechanism (reason) might be cited in the support of that hypothesis?
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    Deforestation causes water on the ground to reflect sunlight
    Deforestation reduces the number of plants able to absorb carbon dioxide
    Photosynthesis produces energy which gives off heat
    Plants produce energy during cellular repiration
  • Q3
    In an energy pyramid, approximately 10% of the energy available in one trophic level is transferred to the next level. Which statement helps explain why this occurs?
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    Organisms use most of the available energy to fuel their own life processes.
    Predators eat more organisms in their own level than organisms in other levels.
    Consumers eat both producers and other consumers
    Producers exist only in the lowest level of the pyramid
  • Q4
    A rainforest area is experiencing a severe drought. As a consequence, the insect population has decreased. What will the insect-eating birds most likely do as a result of the drought?
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    Move to a new area to find food
    Stop searching for food until it begins to rain
    Begin reproducing to increase population
    Start the process of hibernation
  • Q5
    When a cheeseburger is consumed, a person receives proteins, carbohydrates, fats, as well as vitamins. These complex energy molecule must be broken down during the digestive process in order to supply cells with usable energy. What results when large carbohydrate molecules are broken during the digestive process?
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    Chemical energy to mechanical energy
    Radiant energy to chemical
    Radiant energy to mechanical
    Chemical energy to radiant energy
  • Q6
    Sarah’s lab group is trying to determine the identity of four unknown powders. Below is each student’s suggestion about how to test the powders. Sarah “Let’s heat a sample of each on the hot plate.” David “What is we mixed a little weak acid with each powder?” Michael “I think we should taste a little bit of each.” Kaylee “Let’s see which ones dissolve in water.” Which student’s suggestion is the safest way to begin?
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  • Q7
    John was conducting an experiment in which he was trying to measure the cooling effect of water poured on a substance. Which of the following tools would he use to measure that gain or loss of energy in the substance?
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    Graduated Cylinder
    Triple Beam Balance
  • Q8
    Photosynthesis use raw materials for converting radiant energy into a more useable form. What is the usable form of energy produced by this process?
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    Glucose, a form of chemical energy
    Carbon dioxide, a form of thermal energy
    Oxygen, a form of electrical energy
    Cellulose, a form of electrical energy
  • Q9
    The food you eat is made of complex and simple molecules. In digestion, food is broken down into simpler substances. The potential chemical energy of food is transformed into the energy used by the body to do work. What evidence exists that shows that in the human body, during digestion, chemical energy is transformed into another form of energy?
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    Heat is released that keeps the body warm
    Waste material are eliminated
    Food is chewed into smaller pieces
    Respiration or breathing takes place
  • Q10
    Ryan built a biotic community by adding water plants, snails, small fish, and water to a large jug. Which best represents the energy flow in this biotic community?
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  • Q11
    Two boxes and their masses are shown in the diagram. In which of the following situation shows work being done?
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    A student is standing and holding the small box.
    A student is holding the large box 1m above the floor.
    A student is lifting the small box from 0.5m from the floor to a table.
    A student is sitting in a chair and holding both boxes.
  • Q12
    Hay is made up of organic compounds. What are the main elements in many organic compounds?
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    Carbon, Hydrogen, Oxygen
    Radon, Oxygen, Helium
    Helium, Carbon, Sodium
    Sodium, Hydrogen, Nitrogen
  • Q13
    The flow of energy in some Australian food chains is modeled in the energy pyramid below. Based on the model, which consumers would receive the greatest amount of energy captured by the producers in their food chains?
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    Wedge-tailed eagles
    Eucalyptus Tree
    Ring-tailed opossums
  • Q14
    Many processes occur in the digestive system. Which process is best classified as a physical change?
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    Saliva converting the starch molecules in cracker into simple sugars.
    Digestive enzymes breaking down proteins into smaller fragments.
    Teeth grinding an almond into smaller pieces in the mouth.
    Bacteria converting lactose into simple sugars in the intestines.
  • Q15
    Based on its chemical formula, which of the following substances is an organic compound?
    Sodium Chloride, NaCl
    Urea, CH4N2O
    Silane, SiH4
    Ammonium Sulfide,(NH4)2S

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