Which of the following is true of carbon atoms?
A) They are not crucial to life.
B) They can form long, complex, stable chains.
C) They have the ability to replicate.
D) They link together to form proteins.
B
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You push on a block on frictionless ice with a force of 8 N, causing it to accelerate at 2 m/s2 . The mass of the block is __________
Fill in the blank(s) with correct word
When atoms of an element are heated enough that they lose electrons, their emission and absorption spectra change
Indicate whether the statement is true or false
A star more luminous than our Sun will have a habitable zone that is
A) narrower and farther from the star than the habitable zone of the Sun B) narrower and closer to the star than the habitable zone of the Sun C) wider and farther from the star than the habitable zone of the Sun D) wider and closer to the star than the habitable zone of the Sun
Spring tides occur
a. only in March. b. when Earth, the Moon, and the Sun line up. c. fewer than 10 times a year. d. once a month.