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Cards In This Set
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Under natural conditions, large quantities of organic matter decay after each year's plants growth has been completed. As a result of such conditions
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Soil maintain their fertility
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The thin, clear layer that forms the outer coat of the eyeball is called the ....
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Cornea
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The most likely reason why dinosaurs became extinct was that they .....?A. Were killed by erupting volcanoes B. Were eaten as adults by the advancing mammalian groups. C. Failed to adapt to a changing environmentD. Killed each other in combat.
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C. Failed to adapt to a changing environment
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Which of the following is a chemical change?A.Magnetizing a rod of ironB. Burning one pound of coalC. Mixing flake graphite with oilD. Vaporizing 1g of mercury in a vaccum
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B. Burning one pound of Coal
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In the process of manufacturing food, plants....A. create energyB. destroy energyC. Store energy of the sunD. Do not need the energy of the sun
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C. Store energy of the sun
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One-celled animals belong to the group of living things known as
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Protozoa
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Spiders can be distinguished from insects by the fact that spider have
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Four pairs of legs
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An important ore of uranium is called
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Pitchblende
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Of the following, the lightest element known on earth is...?A.HydrogenB. OxygenC. HeliumD. Air
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A. Hydrogen
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Of the following gases in the air, the most plentiful is...?A. ArgonB. OxygenC. NitrogenD. Carbon Dioxide
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C. Nitrogen
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When two forces act on an object in the same direction, the resultant force is equal to the
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Sum of the forces
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Of the following types of clouds, the ones that occur at the greatest altitude are called...
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Cirrus
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A new drug for treatment of tuberculosis was being tested in a hospital. Patients in Group A actually received doses of the new drug; those in Group B were given only sugar pills. Group B represents a(n).....
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Experimental Control
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Of the following, the simple machine that provides a mechanical advantage of 1 is the ...?
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Single Fixed Pulley
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Radium is stored in lead containers because...?
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The lead absorbs the harmful radiation
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