Elementary Science Praxis Exam 4

Elementary Education Praxis II Science Exam 4

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• 1. Areas of reduced temperature on the sun are called

     1.  sunspots

     2.  hotspots

     3.  solar flares

     4.  starspots

  2. The biological process that uses oxygen, water, and carbohydrates to produce energy and carbon dioxide is which of the following?

• • 1.  Photosynthesis.

    2.  Cellular respiration.

    3.  Cytokinesis.

    4.  The dark reaction.

• 3. Which of the following best explains why lightning is always seen before thunder is heard?

• • 1.  Eyes see more quickly than ears hear

    2.  The thunder occurs later than the lightning

    3.  Sound travels faster through the atmosphere than light

    4.  Light travels faster through the atmosphere than sound

• 4. Climatically or geographically defined areas of ecosystems with similar climactic conditions, and similar plants, animals or communities of organism are called which of the following?

• • 1.  Biomes.

    2.  Ecological Niches.

    3.  Food webs.

    4.  Ecozones.

• 5. Fat in the human body is also known as what kind of tissue?

• • 1.  dermal

    2.  epidermal

    3.  subcutaneous

    4.  adipose

• 6. What is the chemical formula for calcium bicarbonate?

• • 1.  Ca2(HCO3)2.

    2.  Ca(HCO3).

    3.  Ca(HCO3)2.

    4.  Ca2(HCO3).

• 7. If 1000 (one thousand) grams of a material with a half life of ten (10) years is placed in the ground, how much of the material will be left after 50 years?

• • 1.  950 grams.

    2.  62.5 grams.

    3.  31.25 grams.

    4.  15.6 grams.

• 8. The three types of muscle in the human body are

• • 1.  skeletal, smooth and epidermal

    2.  skeletal, smooth and cardiac

    3.  smooth, cardiac and epidermal

    4.  skeletal, epidermal and cardiac

• 9. When comparing metals to nonmetals, metals tend to have

• • 1.  Lower melting points and greater conductivity than nonmetals

    2.  Lower conductivity and lower density than nonmetals

    3.  Higher density and lower melting points than nonmetals

    4.  Greater conductivity and higher melting points than nonmetals

• 10. Iron is essential in the structure of human

• • 1.  cartilage

    2.  muscles

    3.  kidneys

    4.  red blood cells

• 11. Which celestial body would have the greatest gravitational influence on Earth if all were at equal distance?

• • 1.  Sun.

    2.  Moon.

    3.  Jupiter.

    4.  Venus.

• 12. What is the primary ability of a capacitor?

• • 1.  To cause electrical resistance.

    2.  To step up an electric charge.

    3.  To hold and discharge an electrical charge.

    4.  To turn a circuit off and on.

• 13. What is the mass in grams of 100 milliliters of a substance that has a density of 5 grams/ml?

• • 1.  20 grams.

    2.  50 grams.

    3.  500 grams.

    4.  200 grams.

• 14. Biology offers us many examples of creatures that look alike but are unrelated. Both a shark and a dolphin look alike, but they are biologically unrelated. One is a fish and the other is a mammal. This phenomenon is known as which of the following?

• • 1.  Confluence.

    2.  Convergence.

    3.  Homomorphology.

    4.  Patterned evolution.

• 15. A phase change diagram illustrates which of the following?

• • 1.  What phase a substance is in at a specific temperature and pressure.

    2.  What phase a substance is in at a specific temperature.

    3.  How substance phase changes over time.

    4.  The volume and density of a substance at each phase.

• 16. Applying Newton's second law, F=ma what is the force on an object with a mass of 100 kilograms, and an acceleration of 32 meters per second per second?

• • 1.  32 N.

    2.  3200 N.

    3.  3.125 N.        

    4. 3.2 x 107 N.

• 17. The best purpose of an experiment is to accomplish which of the following?

• • 1.  Perform the experiment successfully.

    2.  Get the right result.

    3.  To learn something by performing the experiment successfully.

    4.  Use as a means to an end.

• 18. Why do ocean areas near deep water and strong currents tend to be very rich in marine life?

• • 1.  Strong currents transport more food into the area.

    2.  Deep water stays colder, which encourages more sea life.

    3.  Upwelling from deeper water raises water-enriching nutrients to the surface.

    4.  Deep water provides more room for sea life to diversify.

• 19. Born in 1871, Ernest Rutherford is known as the Father of Nuclear Physics. Which of the following is he best known to have accomplished?

• • 1.  The Gold Foil Experiment.

    2.  Inventing the cathode ray tube.

    3.  Discovering the neutron.

    4.  Discovering the proton.

• 20. Why have we not traveled to the nearest star yet?

• • 1.  Because it is too expensive.

    2.  Because no astronaut is interested in traveling that far.

    3.  Because the distance is too great.

    4.  Because we are afraid of aliens.

• 21. The interaction of an organism's genetic make-up and its environment is called which of the following?

• • 1. Ontology begets phylogeny.

    2.  Nature versus nurture.

    3.  Ecology.

    4.  Its niche.

• 22. Which of the following elements is the basis of the chemistry of all known life?

• • 1.  hydrogen

    2.  carbon

    3.  oxygen

    4.  sodium

• 23. Normal stars produce heavier elements by fusing atoms together, but elements heavier than carbon cannot be produced in a normal star. What process is thought to produce all the elements that are heavier than carbon?

• • 1.  Magnetron stars.

    2.  Supernova.

    3.  Pulsars.

    4.  White dwarf stars.

• 24. Which of the following is an element that all living things contain?

• • 1.  Helium

    2.  Copper

    3.  Sodium

    4.  carbon

• 25. In plant cells, chloroplasts are responsible for which of the following?

• • 1.  Acting as the cell’s control center

    2.  Enabling the plant cells to produce their own food via photosynthesis

    3.  Allowing materials to move into and out of the cell

    4.  Supporting and protecting the cell

• 26. Which of the following processes through which water, in various forms, falls to the Earth from the sky?

• • 1.  Condensation

    2.  Precipitation

    3.  Distillation

    4.  Evaporation

• 27. Which individual can be considered the first person in history known for devising methods of trying to arrive at reliable knowledge based on observation?

• • 1.  Roger Bacon.

    2.  Aristotle.

    3.  Galileo.

    4.  Descarte.

• 28. The earth's atmosphere consists of three major gases . Which is the most abundant gas?

• • 1.  Carbon dioxide.

    2.  Oxygen.

    3.  Nitrogen.

    4.  Argon.

• 29. Which of the following is the name of a major current that travels from Florida in the United States to Britain?

• • 1.  Trans-Atlantic Current.

    2.  Gulf Stream Current.

    3.  Ice Flow Offset Current.

    4.  Eastern Trans-Atlantic Current.

• 30. Simple machines make work easier by allowing us to push or pull over increased distances. Which item below is not an example of a simple machine?

• • 1.  The pulley on a crane.

    2.  A wood screw.

    3.  A wood splitting wedge.

    4.  A bicycle.

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