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25 Cards in this Set
- Front
- Back
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All of the following are true of vascular plants except that they...
A. lack tubes, true roots, leaves, and stems B. can live far from water C. can be very large D. may produce seeds |
A. Vascular means "having tubes." All vascular plants have tubes, true roots, leaves and stems.
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Roundworms belong to the phylum...?
A. Mollusca B. Nematoda C. Chordata D. Porifera |
B. All worms can be classified as flatworms, roundworms, or segmented worms, each group having its own phylum. Roundworms belong to the phylum Nematoda.
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Ferns do not have...?
A. spores B. leaves C. roots D. seeds |
D. Ferns are vascular plants, and therefore have leaves. and roots. They reproduce by spores instead of seeds.
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The blood component responsible for producing antibodies is...?
A. red blood cells B. white blood cells C. platelets D. plasma |
B. White blood cells produce antibodies. Red blood cells transport oxygen and carbon dioxide. Platelets form clots. Plasma transports dissolved materials.
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A person suffering from night blindness might be able to improve his/her condition by increasing consumption of...?
A. vitamin A. B. vitamin B12 C. vitamin C. D. vitamin D. |
A. Vitamin A deficiency results in night blindness and skin infections.
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The normal number of chromosomes in a human cell is...?
A. 52 B. 108 C. 30 D. 46 |
D. A human cell has 46 chromosomes, 23 from each parent.
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In an ecosystem, an example of a producer is a...?
A. fungus B. maple tree C. wolf D. rock |
B. Producers make their own food from sunlight energy. Only green plants (like trees) can do this.
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Animal cells do not contain...
A. cell membranes B. ribosomes C. chloroplasts D. mitochondria |
C. Chloroplasts contain chlorophyll, which converts carbon dioxide, water, and sunlight into glucose and oxygen. Only cells from green plants contain chloroplasts.
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A weight lifter presses 150 pounds two feet into the air. The work he does is equal to...
A. 76 newton-meters B. 152 foot-pounds C. 148 newton-meters D. 300 foot-pounds |
D. Work= force x distance. Force= weight = 150 pounds. Distance= 2 feet. 150 pounds x 2 feet= 300 foot-pounds.
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When a match burns,
A. all chemical energy is destroyed B. all kinetic energy is destroyed C. mechanical energy changes to light energy D. chemical energy is changed to heat energy |
D. Energy is never created or lost; it only changes form. The chemicals in a match head store energy which is released in the form of heat and light.
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Among the following substances, the best insulator is...
A. copper B. air C. water D. aluminum |
B. Inslators prevent the flow of heat or electricity. Air is a good insulator. Answers A, C, and D are conductors.
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When wire is moved through a magnetic field, _____ is produced.
A. current B. light C. mass D. charge |
A. Electromagnetic induction occurs when a wire is moved through a magnetic field, producing a current in the wire. This is the basis for electrical generations.
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Which color is not present when sunlight creates a spectrum by passing through a prison?
A. Brown B. indigo C. Violet D. Orange |
A. A sunlight spectrum (rainbow) contains red, orange, yellow, green, blue, indigo, and violet.
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A high-pitched sound has a greater _____ than a low-pitched sound.
A. amplitude B. frequency C. speed D. hertz |
B. Differences in sound volume are related to amplitude differences. Sound intensity is related to amplitude and frequency of sound waves. Speed = Wavelength x Frequency.
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The atomic number of a compound indicates the...
A. mass of an atom B. number of protons in an atom C. charge of an atom D. energy level of an atom |
B. The atomic number of an atom shows how many protons are in the atom's nucleus. Mass, charge, and energy level of an atom are variable and are not used to define an element (or atom.)
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Molecules have the lowest average kinetic energy in a...
A. plasma B. gas C. liquid D. solid |
D. Average kinetic energy is temperature. Materials at very low temperatures are usually solids.
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The most common solvent is...
A. air B. water C. salt D. oxygen |
B. Solvents are materials in which other chemicals can dissolve. Since water is able to dissolve so many materials, it is sometimes called the "universal solvent"
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In the equation C + O2 ------> CO2, CO2 can be called a(n)...
A. reactant B. ion C. solute D. product |
D. In a chemical equation, chemicals to the left of the arrow are called reactants, and those to the right are called products. (The reactants react to produce products.)
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The thickest layer of the earth is called the...
A. crust B. core C. mantle D. lava |
C. Lava is molten rock at the earths surface. Core, mantle, and crust are the three main layers of the earth. The mantle is the thickest layer.
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Life is most abundant in which atmospheric layer?
A. Ionosphere B. Thermosphere C. Stratosphere D. Troposphere |
D. All the answers are layers of the atmosphere. The troposphere is the layer that touches the surface of the earth, and therefore is the layer where life is most abundant.
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One rotation of the earth takes...
A. 24 hours B. 27 1/3 days C. 365 1/4 days D. one year |
A. One rotation of the earth takes 24 hours, or one day. One orbit of the moon takes 27 1/3 days, or one month. One revolution of the earth takes 365 1/4 days, or one year.
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The smallest part of an element that still has the properties of that element is a(n)...
A. atom B. molecule C. proton D. compound |
A. Atoms are the smallest particles of an element that retain the properties of that element. Proton are subatomic particles. Molecules, which are particles of compounds, are made of two or more atoms.
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In photosynthesis, what is formed?
A. Glucose B. Carbon dioxide C. Water D. Chlorophll |
A. In photosynthesis, water and carbon dioxide are combined, using sunlight energy and aided by chlorophyll, to produce glucose and oxygen.
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Rock formed by the cooling and hardening of molten material is called...
A. igneous B. crystal C. metamorphic D. sedimentary |
A. Igneous, metamorphic, and sedimentary are types of rock, but crystal is not. Igneous rock is formed by the cooling and hardening of molten material.
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The bicep muscle is made up of...
A. cardiac muscle B. involuntary muscle C. voluntary muscle D. smooth muscle |
C. The bicep is made of striated muscle which is controlled voluntarily. Smooth muscle is controlled involuntarily, as is cardiac muscle.
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