Question

1. earth temperatures drop when high amounts of which gas are present in the atmosphere?

○ oxygen
○ nitrogen
○ methane
○ hydrogen

Explanation:

The question asks which gas causes Earth temperatures to drop when present in high amounts. Oxygen (O₂) and nitrogen (N₂) are major non-greenhouse gases with no cooling effect. Methane (CH₄) is a greenhouse gas that warms the planet. Hydrogen (H₂) is a light gas; in high atmospheric concentrations, it can reduce the greenhouse effect by altering the atmosphere's composition, leading to cooling.

Answer:

hydrogen