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NOS Practice 2

Quiz by Oksana Tariche

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30 questions
Show answers
  • Q1
    Colleen waters the plants in her greenhouse once everyday. She wants to find out if the plants will grow more leaves if they are watered more often. She counts the number of leaves on each plant before she starts. She then continues to water half of each type of plant once daily, but she waters the other half of each type twice a day. Which is one of the controlled variables (Constants)?
    The number of leaves the plant grows
    The amount of light the plants receive
    The number of time the plants are watered
    How healthy the plants look.
    120s
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  • Q2
    Colleen waters the plants in her greenhouse once everyday. She wants to find out if the plants will grow more leaves if they are watered more often. She counts the number of leaves on each plant before she starts. She then continues to water half of each type of plant once daily, but she waters the other half of each type twice a day. What is the outcome variable (dependent variable)?
    The number of time the plants are watered
    The type of plant being grown
    The number of leaves the plant grows
    The amount of light the plant receives
    120s
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    Delete
  • Q3
    Colleen waters the plants in her greenhouse once everyday. She wants to find out if the plants will grow more leaves if they are watered more often. She counts the number of leaves on each plant before she starts. She then continues to water half of each type of plant once daily, but she waters the other half of each type twice a day. What is the test variable (independent variable)?
    The type of plant being grown
    The number of leaves the plant grows
    The number of time the plants are watered
    The amount of light the plant receives
    120s
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    Delete
  • Q4
    Christy wants to find out if the birds that visit the bird feeders in her backyard would rather build nests in birdhouses or in trees. She puts a birdhouse next to the feeder containing sunflower seeds and hangs a feeder containing cracked corn from a tree. She observes the birds’ nesting activities over the next two weeks and records her observations. Which of the following would improve Christy’s investigation?
    Setting the feeders up closer to each other
    Putting the same kind of food in both bird feeders
    Setting up a third bird feeder containing fruit near a bird bath
    Putting more food next to both bird feeders
    120s
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  • Q5
    The graph shows the amount of oxygen (O2) used and carbon dioxide (CO2) produced during cellular respiration. Based on the graph, which of the following statements are evidence of the relationship between the levels of oxygen and carbon dioxide during cellular respiration?
    Question Image
    The amounts of oxygen and carbon dioxide are constant over time.
    As the level of oxygen decreases, the level of carbon dioxide increases.
    The amounts of oxygen and carbon dioxide are decreasing over time.
    The amounts of oxygen and carbon dioxide are increasing over time.
    120s
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  • Q6
    Jason states the following prediction: “As the air temperature increases, the air in a balloon will expand, increasing the circumference of the balloon.” Some of Jason’s observations during his experiment are shown to the right. Which of the following is the test variable (independent variable) for an experiment designed to test Jason’s prediction?
    Question Image
    Change in the circumference of the balloon
    How fast the balloon expands
    Material the balloon is made of
    Difference in air temperature
    120s
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  • Q7
    Jason states the following prediction: “As the air temperature increases, the air in a balloon will expand, increasing the circumference of the balloon.” Some of Jason’s observations during his experiment are shown to the right. Which of the following is the outcome variable (dependent variable) for an experiment designed to test Jason’s prediction?
    Question Image
    Material the balloon is made of
    How fast the balloon expands
    Change in the circumference of the balloon
    Difference in air temperature
    120s
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  • Q8
    Students made an electromagnet by wrapping a wire in loops around an iron nail and attaching the wire to a battery, as shown. The students conducted a test to learn how the number of wire loops affected the number of paper clips held by the electromagnet. The table shows the results of the test. Based on the information from the table, which of the following is the test (independent) variable in this experiment?
    Question Image
    The material the nail was made of.
    The size of the battery
    The number of wire loops wrapped around the nail.
    The number of paper clips held by the electromagnet.
    120s
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  • Q9
    Students made an electromagnet by wrapping a wire in loops around an iron nail and attaching the wire to a battery, as shown. The students conducted a test to learn how the number of wire loops affected the number of paper clips held by the electromagnet. The table shows the results of the test. Based on the information from the table, which of the following is the outcome (dependent) variable in this experiment?
    Question Image
    The size of the battery
    The number of paper clips held by the electromagnet.
    The material the nail was made of.
    The number of wire loops wrapped around the nail.
    120s
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  • Q10
    Derek hypothesizes that a potted fern in a closed container will stay healthier than the same type of plant on an open windowsill. At the conclusion of his investigation, Derek finds that his results support his hypothesis. Which BEST explains why Derek should repeat the investigation?
    To learn why the hypothesis is correct
    To be able to start another investigation
    To make sure the results are reliable
    To prove the investigation is important
    120s
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  • Q11
    When scientists conduct experiments, they share their data and conclusions with other scientists so that
    Other scientists can try to verify the results by repeating the same procedure
    Other scientists can also get credit for scientific discoveries.
    New scientific laws and theories can be quickly established.
    Society will accept what the scientists say.
    120s
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  • Q12
    Emily claims to have made a new scientific discovery. However, while conducting her experiments, she did not keep accurate records or data. Which of the following should happen next?
    The experiment should be repeated, this time keeping accurate records.
    Society should accept the results, since a new discovery was made.
    Emily should try to remember her results and write them down from memory.
    The whole procedure should be disregarded and is not worth repeating.
    120s
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  • Q13
    A controlled experiment is a means for carrying out a fair test of a hypothesis. In a controlled experiment, all of the variables that can influence the outcome variable (dependent variable) of the experiment are controlled or held constant, except for the test variable (independent variable). Which of the following hypotheses would NOT be tested using a controlled experiment?
    A biologist’s hypothesis that the use of fertilizer increases the growth of grass.
    A geologist’s hypothesis that acid rain weathers sedimentary rock more rapidly than igneous rock.
    A biologist’s hypothesis that increases in average temperatures causes an increase in the honey bee population.
    A geologist’s hypothesis about how the Grand Canyon formed.
    120s
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  • Q14
    A scientist is testing a new design for the blade of a wind turbine used to generate electricity. Which of the following is the best first step for the scientist to take?
    Construct a scale-model of the blade and test it in actual weather conditions.
    Build several full-size versions of the blade and place them on existing turbines.
    Design a computer simulation to test how well the blade will work.
    Take an existing blade and modify it with the new design.
    120s
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  • Q15
    Sara is studying the human skeletal system. Her classroom has a model skeleton. What main advantage does a model skeleton have over a drawing of a skeleton?
    It shows how the body moves.
    It displays all of the bones at once.
    It makes it easier to learn the names of each bone.
    It displays the skeleton in three dimensions.
    120s
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  • Q16
    Bernard is designing a new boat. His first step is to use a computer modeling software to create and test his design in simulated weather and wave conditions. How does Bernard benefit from using a computer-generated model instead of a full-sized boat?
    It is easier to communicate his findings to others.
    It proves that his design will work in real weather conditions.
    It is more cost-effective and safer for him to test.
    It allows him to observe things he could not normally see.
    120s
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  • Q17
    Coral is making a model of a water molecule using colored balls and sticks. Which of the following best describes an advantage that her ball-and-stick model has over a model drawing of a water molecule?
    It shows the parts of the molecule with the correct colors.
    It shows motion of the molecule's atoms.
    It shows the shape of the molecule in three dimensions.
    It shows the size of the molecule's atoms to scale.
    120s
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  • Q18
    Susan noticed that hummingbirds in her yard visited all the flowers, but especially seemed to like the red trumpet-shaped ones. She read that they use the nectar in the flowers for food. She assumed that since the parents were eating nectar, they must feed their babies nectar as well. To her surprise she saw hummingbirds bringing small insects and spiders to feed the young hummingbirds. How does this new evidence affect her original assumption?
    She should be able to stick to her assumption that the babies eat nectar since she thought that first.
    She should change her original assumption that they only feed their babies nectar.
    She should ask other people what they think and agree with the majority.
    She should believe what she read in the book and disregard what she witnessed.
    120s
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  • Q19
    Which of the following statements is true?
    There are no absolutes in science.
    All of the answers are correct.
    Scientific laws can be improved with new discoveries.
    Scientific laws are durable.
    120s
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  • Q20
    Although a scientific theory is well supported and widely accepted, what might cause it to change?
    New evidence
    A scientific model
    A scientific law
    Individual claims
    120s
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