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help me and i will give you ten points.!!?

help me and i will give you ten points.!!? - Physics Forum

help me and i will give you ten points.!!? - Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.


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Old 06-22-2009, 07:17 PM
Pipette Filler
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Default help me and i will give you ten points.!!?



1.) Why do we only see one side of the moon from Earth?
the Moon rotates at the same speed as the Earth
You can see different sides of the moon from varying locations on Earth
The Moon rotates one time on its axis every time it orbits the Earth


2.) How long does it take the moon to orbit the Earth?
29 1/2 days
30 days
28 days


3.) What are the dark features on the moon's surface?
Volcanos
Mares or basins
Ray craters


4.) What causes an eclipse of either the sun or the moon?
location of the planets
temperature of the sun
angle of the sun


5.) What effect does the Moon's gravitational pull have on the earth?
The moon keeps the Earth on an even keel on its axis
The moon causes the rise and fall of the Earth's ocean tides
Both A and B


6.) Many features of the moon are clearly visible with the naked eye.
True
False
Not enough information


7.) Which of the following objects utilize wheels and axles?
bicycle and car
can opener, salad spinner, and egg beater
all of the above


8.) According to the video, a pulley is a ________ that turns.
wedge
lever
fulcrum


9.) Which of the following objects utilizes a pulley mechanism?
pizza cutters, see saws, and tooth brushes
flag poles, ski lifts, and tow trucks
all of the above


10.) A gear is a toothed wheel, cylilnder, or cone that transmits motion from one part of a machine to another; it is one of the oldest means of ___________.
lifting heavy objects
transmitting motion
separating two objects from each other


11.) What invention revolutionized the study of the sky?
microscope
airplane
telescope


12.) Since direct observation of atoms is almost impossible, scientists rely on:
microscopes.
proton beams.
models


13.) What can scientists learn from using a spectrometer?
how fast stars are moving
if there are spectacles in space
if people live on Mars


14.) How can the mass of the Sun be 300,000 times Earth's, when its diameter is only 100 times Earth's?
the Sun is hotter on its surface, making it heavier
the density of the Sun is much higher than the Earth's, especially near the core
the gravity of the Sun increases its mass


15.) How do gamma rays at the core become visible light at the surface?
radiation is absorbed and re-emitted at a lower frequency
visible light rays are the same as gamma rays
the amplitude of the radiation drops as it moves to the surface


16.) Which planets besides Earth sustain life?
all of them
Mars and maybe Jupiter
none of them


17.) The Charge Cloud model describes _________ as being part of a diffused cloud of varying densities
atoms
protons
electrons


18.) What does the Molecular Theory of Matter say?
Molecules are made of tiny matter in motion
Matter is made of tiny molecules in motion
Molecules don't matter


19.) What was the first subatomic particle to be discovered?
proton
neutron
electron


20.) When 2 hydrogen molecules react with 1 oxygen molecule what is the product?
carbon dioxide
nitrogen
water
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  #2  
Old 06-22-2009, 07:17 PM
Pipette Filler
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10 points - 20 questions
not a fair repayment
how about 10 points per question?
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  #3  
Old 06-22-2009, 07:17 PM
Pipette Filler
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5b

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