While Mars is half as big as the Earth in diameter, its surface gravity is only about 40% as strong as the 1 g we experience here on Earth
Indicate whether the statement is true or false
TRUE
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Are comets common? Explain why or why not
What will be an ideal response?
Which force holds the quarks together within a proton?
a) Gravity, through exchange of gravitons. b) Proton/neutron mutual attraction forces. c) The 'strong' force, through exchange of gluons. d) Electromagnetic, through exchange of photons. e) The 'weak' force, through nuclear decay.
Consider the image formed by a refracting telescope. Suppose an opaque screen is placed in front of the lower half of the objective lens. What effect will this have?
A) The top half of the image will be blacked out. B) The lower half of the image will be blacked out. C) The entire image will be blacked out, since the entire lens is needed to form an image. D) The image will appear as it would if the objective were not blocked, but it will be dimmer. E) There will be no noticeable difference in the appearance of the image with the objective partially blocked or not.
Bowen's reaction series predicts the ________ of the different mineral grains that grow from crystallizing magmas.
a. size and color b. texture and size c. order of crystallization d. color and shape