Answer:
The force that pulls the moon toward Earth is called _Gravity_.
Explanation:
Gravity is the force that holds the planets in orbit around the sun and keeps the moon to orbit around Earth. the moon pulls the oceans towards it causing ocean tides, because of the gravitational pull. gravity creates planets and stars by pulling material together from which stars and planets are made.
Answer:
excretory system and circulatory system
Explanation:
Blood is part of circulatory system and as it move through various organs it exchanges the gases i.e give oxygen to the cell and take carbon dioxide from them. After taking CO2, the blood becomes impure and hence it passes through the kidney before going to the heart. Kidney is part of excretory system which removes carbon dioxide from blood and thus purifies it.
Answer:
#3 an increase in the concentration of hydrogen peroxide.
Explanation: