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