The rover was designed to explore A.Mars
Oxygen cannot be broken down into a simpler substance by using chemicals :) Hope this helps and the other answer gets removed :)
Answer: the correct answer is a.
Explanation: a spreading of the sea floor is the correct answer.
Answer:
every real machine must be less than 100 because of the force that overcome friction
Answer:
4 and 6
Explanation:
Period 4 has 18 elements and so does period 6.