Question: What is the missing first step of the following process: - Some is reflected back into space - The rest of the energy is absorbed by land and oceans, heating the Earth - Heat radiates from Earth to space - Some of this heat is trapped by greenhouse gases in the atmosphere - Human activities such as burning fuel are increasing the amount of greenhouses gases - This causes more heat radiation to stay trapped in our atmosphere - The Earth's temperature rises -
Answer: Solar radiation reaches Earth's atmosphere

Question: What is the missing first step of the following process: - The egg hatches - A larva emerges - The larva eats and grows - The larva sheds its skin - The larva enters a chrysalis - The pupa grows inside the chrysalis - The adult butterfly exits the chrysalis - The adult butterfly is now fully grown - The adult butterfly lays more eggs.
Answer: A butterfly starts as an egg

Question: What is the missing first step of the following process: - Once in the lungs, oxygen is moved into the bloodstream and carried through your body - At each cell in your body, oxygen is exchanged for a waste gas called carbon dioxide - Your bloodstream then carries this waste gas back to the lungs where it is removed from the blood stream and then exhaled - Your lungs and respiratory system automatically perform this vital process, called gas exchange -
Answer:
He air we breathe contains oxygen and other gases