Elementary Science Praxis Exam 2

Elementary Science Praxis II Quiz 2

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1.       What type of star is our sun?

a.        Red giant star.

b.        Yellow dwarf star.

c.         White dwarf star.

d.        Blue giant star.

2.       Which of the following planets is sixth from the Sun and has a system of rings made up of ice particles, rocky debris and dust?

a.        Uranus

b.        Pluto

c.         Saturn

d.        Neptune

3.       Where are the abyssal plains in the ocean?

a.        The deepest part of the ocean, at depths below 6,000 meters.

b.        The deep ocean floor, an expanse of low relief at depths of 4,000 to 6,000 meters.

c.         On the continental shelf areas of depth, from 1,000 to 2,000 meters.

d.        In the pelagic zone at the limit of light penetration, at between 100-500 meters.

4.       What would happen if the world suddenly stopped spinning?

a.        The length of the year would be elongated.

b.        Daytime would occur one-half (1/2) of the year, and nighttime would occur one-half (1/2) of the year.

c.         The Earth would be wiped clean by high winds, cause by the atmosphere's continued motion.

d.        The temperature would go up for six (6) months, and would go down for six (6) months.

5.       Which of the following technologies would be most useful in locating a ship that has sunk to the bottom of the ocean?

a.        Sonar

b.        Laser

c.         Morse code

d.        Telescope

6.       What statement about absolute zero is not true?

a.        It is possible to achieve absolute zero through artificial means.

b.        At absolute zero, all atomic motion ceases.

c.        Absolute zero is at −273.15° centigrade.

d.        Entrope is zero at absolute zero.

7.       What phase of the moon is shown directly above the phrase "What phase is this ?" in the diagram?

a.        New moon.

b.        Full moon.

c.         Gibbous moon.

d.        Waning crescent.

8.       What are the primary functions of plant roots?

a.        Water and nutrient absorption.

b.        Anchorage and nutrient absorption

c.         Anchorage, water, and nutrient absorption.

d.        Carbon fixation, anchorage, and water absorption.

9.       By Coulomb's Law, if the force between two charges is 64 N, and you separate the charges by twice the distance, the force will drop to which of the following?

a.        32 N.

b.        16 N.

c.         It falls off by the distance between the plates squared.

d.        8 N.

10.    If the average kinetic energy of a system goes up, what happens to the temperature?

a.        It goes up.

b.        It goes down.

c.         It stays the same.

d.        It goes up exponentially.

11.    The backbone of a DNA molecule is made up of which of the following?

a.        Nucleotide.

b.        Amino acids.

c.         Deoxyribose sugars.

d.        Cellulose.

12.    The conversion of light energy into chemical energy by living organisms is called

a.        telekinesis

b.        photogenesis

c.         photosynthesis

d.        absorption

13.    When classifying organisms through binomial nomenclature, the seven main ranks from LARGEST to SMALLEST are as follows:

a.        Kingdom, Class, Order, Phylum, Family, Genus, Species

b.        Kingdom, Phylum, Order, Class, Family, Genus, Species

c.         Kingdom, Order, Class, Phylum, Family, Genus, Species

d.        Kingdom, Phylum, Class, Order, Family, Genus, Species

14.    AC and DC currents differ in an important way. What is that difference?

a.        One is more powerful than the other.

b.        One can be used to run lights and the other cannot.

c.         One has alternating current poles and the other does not.

d.        One is more dangerous than the other.

15.    Which one of the following statements can be considered scientific fact?

a.        The Egyptian's built pyramids using the levers and inclined plane.

b.        Only five percent (5 %)  of all the deep ocean mollusks have been identified.

c.         The moon orbits the Earth.

d.        Five out of ten people prefer Best toothpaste.

16.    Spiders are related to crabs. Within what phylum are both animal types found?

a.        Echinodermata.

b.        Mollusca.

c.        Crustacea.

d.        Arthropoda.

17.    Ignoring wind resistance, at what rate will a penny falling from a bridge accelerate?

a.        At about 60 miles per hour.

b.        At 45 meters per second.

c.        At 32 feet/second/second.

d.        At 100 meters per second squared.

18.    The term for the “scaffolding” that helps to protect the cell and maintain its shape (labeled # 7 in the diagram) is which of the following?

a.        Nucleus

b.        Cytoskeleton

c.         Smooth endoplasmic reticulum

d.        Rough endoplasmic reticulum

19.    Tony was cleaning a warehouse and found evidence of lots of mice living there.  A few days later, he became very ill with flu-like symptoms and went to the hospital. Based on the aforementioned events, what would be a good hypothesis for why Tony became sick ?

a.        He could be suffering from rabies.

b.        He may have contracted the flu after working too hard.

c.         He may have contracted a hantavirus.

d.        Toxic chemicals in the warehouse may have made him ill.

20.    Absolute zero is the lowest temperature that it is possible to reach.  In terms of the Kelvin scale, this is

a.        0 degrees

b.        -273 degrees

c.         -459 degrees

d.        -820 degrees

21.    A sky diver falling from a plane without opening his shoot reaches a maximum speed of around 120 miles per hour in freefall. What is the maximum speed called?

a.        Velocity max.

b.        Terminal velocity.

c.         Free fall velocity.

d.        Maximum G.

22.    A parallel circuit is best described by which of the following?

a.        Electricity flows along more than one pathway

b.        There is more than one source of electricity

c.         There is only one source of electricity

d.        Electricity flows along one pathway

23.    What is the standard path that a projectile traveling under the influence of gravity always travels on?

a.        Linear path.

b.        Trajectory or parabola.

c.         Hyperbola.

d.        Logarithmic expansion.

24.    Tides in the Earth's oceans are the result of which of the following?

a.        the pull of gravity exerted by the Moon only

b.        the pull of gravity exerted by the Sun only

c.         the pull of gravity exerted by both the Moon and the Sun

d.        none of the above

25.    The most appropriate unit of measurement to express the distance between the Milky Way galaxy and other galaxies would be which of the following?

a.        Light-year

b.        Meter

c.         Kilometer

d.        Mile

26.    The path of one object around a point or body is called a(n)

a.        cycle

b.        revolution

c.         orbit

d.        phase

27.    The Miller-Urey Experiment established what important idea?

a.        The idea that spontaneous generation of life was not possible.

b.        The idea that geological separation can stimulate evolution.

c.         The idea that The Big Bang left cosmological background radiation everywhere in the universe.

d.        The idea that ancient condition on Earth could have produced life's precursor chemicals.

28.    How does the entropy of water change when it changes phases from a liquid to a gas ?

a.        It stays the same.

b.        It is lost.

c.         It goes down.

d.        It goes up.

29.    Very fast flowing wind currents found at airliner altitude levels are called which of the following?

a.        Jet streams.

b.        Tropospheric currents.

c.         Gulf Stream.

d.        Thermals.

30.    Another name for the manner in which an organism makes a living is called which of the following?

a.        Ecology.

b.        Habitat.

c.        Ecosystem.

d.        Niche.

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