The Milankovitch hypothesis suggests that the shape of Earth's orbit, its precession, and tilted axis can influence climatic changes and thus cause _____
a. hurricanes
b. ice ages
c. season shift
d. longer days
e. warmer weather
b
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A narrow tube is placed vertically in a pan of water, and the water rises in the tube to 4 cm above the level of the pan. The surface tension in the liquid is lowered to one-half its original value by the addition of some soap
What happens to the height of the liquid column in the tube? A) It drops to 2 cm. B) It drops to 1 cm. C) It remains at the same height. D) It drops or rises, but the height cannot be calculated from the information given.
Where do most dust grains form?
A) in molecular clouds B) in the winds of red giant stars C) in planetary nebulae D) in supernovae E) all of the above
A raindrop is doing its part to form a primary rainbow. Red and blue light enter near the top of the raindrop together from the sun. Both red and blue are reflected once at the back surface of the drop, but when the two rays emerge on the sunward side
A. the red ray lies above the blue ray and is more nearly horizontal than the blue ray. B. the blue ray lies above the red ray and is more nearly horizontal than the red ray. C. the blue ray lies below the yellow ray and is more nearly horizontal than the yellow ray. D. None of these choices are correct
An object's ______________would be the same on Earth and on the Moon, but its weight would be different
Fill in the blank(s) with correct word