Question: Which is needed for photosynthesis to occur
Choices:
text: chemical with the atomic number 18
label: A
text: energy that takes 8.3 minutes to travel to Earth
label: B
text: the 8th entry on the periodic table
label: C
text: the most prevalent chemical in the atmosphere
label: D
Answer: B
Fact: photosynthesis means green plants convert from carbon dioxide, water, and solar energy into oxygen for themselves