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