Answer:
1) 20, 40.078, 20, 20,20,
2) proton, 4, 1
Explanation:
not an expert so I hope this is correct :)
The respiratory system brings oxygen unto the lungs, while the circulatory system delivers oxygen throughout the body.
True
The greater the object weighs (volume) the heavier it is, and it the object is heavier, the the buoyancy force will be higher
Hope this helps :)
The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide and ozone. Without greenhouse gases, the average temperature of Earth's surface would be about −18 °C (0 °F), rather than the present average of 15 °C (59 °F).
