Final Test Study Guide
Card Set Information
Final Test Study Guide
the sun is a steady star and not a _____ star like Mira.
how many earth diameters would it take to equal the diameter of the sun?
water must be in the ____ state for life to exist.
the sun is about ____ miles away from the earth.
the sun is made mostly of the elements ______ and _____
heat and light travel through space by _____
dark spots on the sun are called _______, and their number increases and decreases in a cycle of about _______ years.
the sun produces its energy as particles of _______ unite to form _____
the best displays of aurora borealis, also called northern lights, occur during times of (many, few) sunspots
northern lights, many
the moon goes through one cycle of it's _______, or different shapes, in ______ days
phases, 29 1/2
the gravity of the moon causes the ____ of the ocean.
the moon is unsuitable for life because it has no ____ or _______ and because its temperature is both too ____ and ______.
air, water, hot, cold
a lunar eclipse occurs when the shadow of the ____ falls on the ______
a solar eclipse occurs when the shadow of the ____ falls on the ____
a solar eclipse is total when the size of the moon appears (equal to, smaller than) the size of the sun
a solar eclipse is annular when the size of the moon appears (equal to, smaller than) the size of the sun
the orbits of the planets, and especially those of the comets, are in the shape of a ( a circle, an egg, an ellipse )
the planets located in side the planets orbits are called ____ planets
the close a planet is to the sun, the (more slowly, more swiftly) it travels and the (shorter,longer) its year is
more swiftly, shorter
mercury is hot on one side and cold on the other because it rotates (slowly, swiftly)
the atmosphere of Venus is mostly ____ _____, and it contains clouds of ____ ______
carbon dioxide, sulfuric acid
Venus rotates _______ on its axis, which cannot be explained by evolution
the axis of Mars is ____, which is what causes it to have ____ as the earth does
between the orbits of Mars and Jupiter are thousandas of small bodies called _____
sometimes the superior planets appear to move backward in relation to the stars. this is called ____ motion
four of jupiter's ____ can be seen with a small telescope
Saturn is surrounded by beautiful ____ that look like a disk of gold
the axis of Uranus is almost ( level, verticle ) in relation to its orbit
the location of Neptune was predicted by the use of ________
the earth's axis is tilted ______ degrees, and this cauuses the ___ of the earth
23 1/2, seasons
to be at a place that has sunshine at midnight, you would need to go north of the ____ ____ or south of the ____ _____
arctic circle, antarctic circle
water is called H2O because each molecules has two atoms of ____ and one atom of ______
water moves upward through soil by a process called ____ ______
four-fifths of the air is _____, and one fith is ______
the atmosphere protects the earth from most _____, which are speeding rocks from outer space
almost what fraction of the earth is covered with water?
the oceans make the surrounding land (warmer, colder) in winter and (warmer, colder) in summer
a _____ is a movement of ocean water from one place to another
in the water cycle, water falls from clouds as _____, streams and rivers carry it to the _____, and then it ______ to form clouds again.
rain, ocean, evaporates
in the oxygen cycle, people and animals breathe out ____ _____, which plants use, and plants give off _____, which people and animals breathe
carbon dioxide, oxygen
plants called _____ build up nitrogen compounds in the soil through a process called _____ ________
legume, nitrogen fixation
in the process called ____, plants use ___ and ___ ____ in the presence of sunlight to make sugar
photosynthesis, water, carbon dioxide
in many plants, sugar is changed to _____ and stored in some part of the plant
dead plant materials improve the soil by decaying to form ______
a farmer may spread ____ to increase the nutrients of the soil, or he may spread ____ to improve the pH
feeds mostly on plants is (carnivorous, herbivorous, omnivorous)
an animal that kills and eats other animals is (carnivorous, herbivorous, omnivorous)
an animal that feeds on plants and other animals is (carnivorous, herbivorous, omnivorous)
in the ___ ____, a small animal is eaten by a larger animal, and the larger animal is eaten by a still larger animal
carnivorous and herbivorous animals control each others populations, and this produces a ___ of _____
balance of life
the study of living things in relation of their surroundings is called ______
the law of conservation of energy cannot be ____ or _____
the law of thermodynamics states that energy always moves from a ___ level to a ____ level
energy in motion is (kinetic, potential) energy
stored energy is (kinetic, potential) energy
three sources of free energy are the ____, falling ____, and wind
sun, water, wind
what three things are needed for a gasoline engine to run?
fuel, air and spark
name in order the four strokes or a gasoline engine
intake , compression , power , exhaust
three things needed for any transportation are ____, _____, and _____
support, propulsion, and control
write words to complete this sentence: electricity flows in a wire when the wire passes near a magnet and cuts the invisible.......
lines of magnetic force
electrical pressure is measured in ___
a circuit is ____ if it forms a complete path for electricity, and _______ if it does not
a ______ ______ protects a circuit from too much electrical current
in an electric motor, a moving electromagnet called the ____ turns as it is attracted or repelled by the ____ ____
armature, field magnets
what are the two laws of magnetism by which all electric motors operate?
like poles repel, unlike poles attract
in a light bulb, the ___ glows white hot and produces light
in a telephone, the ___ changes the sound of a speakers voice into a varying electrical current
in a telephone, the ___ changes the varying current into a sound like the speakers voice
for greater surface area, the lungs have millions of small ____, and the small intestine has millions of _____
blood cells called ____ ____ carry oxygen, and blood cells called _____ _____ fight germs
red corpuscles, white corpuscles
name the four important body systems that you studied in unit 7