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24 Cards in this Set
- Front
- Back
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A scientist studied algal growth in four ponds during one month. He displayed his data in the table above. Which of the following is most likely responsible for low growth in ponds Y and Z?
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lack of nitrogen fertilizers
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An ecologist is studying the animals that live among the rocks in a fast-moving stream.Which of the following is the most important for the ecologist to bring along to ensure his safety?
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other people to help him if he slips
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A water scientist can use a Secchi disk to monitor the turbidity of the water.This technology is a circle,usually painted half white and half black,that is attached to a pole or a rope.A Secchi disk is an example of technology
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artifact
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A teacher had his class collect data about the nutrients in a nearby pond. He wants his class to organize the data. Which of the following would help help the students do this?
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a spreadsheet program
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A student wants to do something to improve water quality. Which of the following activities could the student do?
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turn off the water in the sink while she brushes her teeth
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A team of scientists has volunteers help them collect data on water quality.Each volunteer is assigned a location and given the same tools.What is one disadvantage to this system of data collection?
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The volunteers’ skill in measurement could differ widely
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A database containing information on the turbidity of the water off the coast of North Carolina can benefit a scientist who is
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designing a tool that extracts sedimenting
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A student is conducting research at the county conservation office. The office a library containing information on the natural resources in the county. Which question is the student most likely researching?
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how many streams in the county flow into the main river in the river basin?
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A student wants to learn about possible effects of excess nutrients in North Carolina waters. Which information system would be most helpful to the student?
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A collection of articles on North Carolina water issues
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The invention of submersibles allowed scientists to explore the ocean depths. This led to the discovery of life in places previously thought too extreme for life. Which of the following is a type of technique associated with the use of submersibles?
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Taking pictures at deep-sea depths with the submersibles cameras
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Which statement identifies a socio-technical system required to ensure the health of water systems?
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Designing and constructing tools to be used in monitoring water quality
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Which of the following is a source of point-source pollution likely to affect the water quality of a small stream in a rural area?
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A septic tank that stores a family’s solid waste
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When you set up for an experiment involving a burner, you should be especially careful to first clear the area of which type of substance?
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Flammable liquids
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During the 1920’s and 1930’s, large balloon-like airships called dirigibles were filled with hydrogen gas provided the lift to keep the airships aloft. In time, however, hydrogen was replaced with helium as the gas of choice for dirigibles. What is the main advantage of using helium gas instead of hydrogen gas in dirigibles?
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Hydrogen gas is highly flammable, and helium gas is not
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An engineer is researching metal alloys that can be used to sheath the outside of a fast-moving submarine. Which of the following properties would be most important for such a material to have?
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High malleability, low density
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These alloys have properties different from pure iron and from each other. For example, pure iron is magnetic, but an alloy of iron and magnesium is not. Pure iron rusts easily, but an alloy of iron, chromium, and nickel does not The element iron is often combined with different metals to produce alloys.
Why have researchers developed different alloys of iron? |
To produce materials for use in technologies that iron is not suited for
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Alloys are specially designed metals that mix two or more natural metals to combine their desirable properties. What is the knowledge used to produce alloys an example of?
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A socio-technical system
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Which of the following pieces of equipment is the most important to use in this experiment?
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Goggles
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Which of the following correctly compares the elements in column A of the periodic table with the elements in the middle column?
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The elements in the middle columns are poorer conductors of electricity than the elements in column I A.
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What do these chemicals have in common? CuSO4 ZnCl2 Fe2O3
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Presence of metal
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You have a sample of an unknown element.At room temperature,this element is a gas and reacts easily with other elements to form compounds,In which column of the perodic table does this element most likely belong?
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VIII A
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Which of the following measurements could make to gather data related to the law of conservation of matter?
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the volume occupied by the total system before and after burning
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Which of the following process with produce an estuary?
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the formation of a river valley followed by a worldwide melting of glaciers
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Based on the fossils, which animals were most closely related?
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2 and 5
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