A) stetch both sides the same B) stretch one side tighter C) only stretch one side
A) about 4.5 billion years B) about 18-20 billion years C) about 6000 years D) about 3.4 billion years
A) Macro - changing from one kind to another. B) Cosmic - origin of time, space, and matter. C) Micro - variations within kinds D) Chemical - the origin of higher elements from hydrogen.
A) a mass a few light years in diameter B) a mass the trillionth the diameter of a protron C) nothing
A) loose B) increase
A) away from the earth B) closer to the earth C) neither of these
A) slowing down B) staying the same C) speeding up
A) I don't know B) no C) yes
A) neither B) saltier C) less saltier |