A) stetch both sides the same B) only stretch one side C) stretch one side tighter
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) 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) a mass the trillionth the diameter of a protron C) nothing
A) loose B) increase
A) neither of these B) closer to the earth C) away from the earth
A) speeding up B) slowing down C) staying the same
A) I don't know B) no C) yes
A) saltier B) neither C) less saltier |