To make sure that we have enough resourses to sustain ourselves. You see, if we use up, say, all water on earth, then obviously we won't have any more and we'll die.
# 7 the answer is 4) because you need opposites in order to attract
# 8 I'm going to guess it is 4) because electricity is needed in order a light bolt to work.(don't take my word for this one I'm not sure but, the other answer are correct)
# 9 the answer is 4) because the comb dose collect negative charges from the hair in order to make the hair have positive charge.
Hope this helped : )
Your eyes are the most delicate thing on your body. Little things can make you go blind
Answer:
Earths shadow covering the moon would create a lunar eclipse.
Explanation:
because i just know
Answer:
it becomes a gas
Explanation:
the matter expands, turning into steam, a gas.
