Which situations describe an elastic collision? a. two glass marbles bounce off each other. b. rodrick flops onto his sofa and sinks into the cushion. c. a tossed water balloon flattens when it lands on the grass. d. a bowling ball knocks over five pins.

Which term describes the number of waves that pass a given point in a given time? crest frequency trough wavelength

Compare asexual reproduction to sexual reproduction

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.