1. Which of the following is not a greenhouse gas? a) Carbon dioxide b) Methane c) Nitrous oxide d) Oxygen
2. Which of the following is an example of a renewable energy source? a) Coal b) Natural gas c) Solar power d) Nuclear power
3. What is the primary cause of deforestation? a) Urbanization b) Agriculture c) Mining d) Climate change
4. What is the term for the process by which plants convert sunlight into chemical energy? a) Photosynthesis b) Respiration c) Decomposition d) Transpiration
5. Which of the following is an example of a keystone species? a) Lion b) Elephant c) Bee d) Deer
6. What is the term for the gradual increase in the Earth's average temperature due to human activities? a) Global warming b) Climate change c) Greenhouse effect d) Ozone depletion
7. What is the term for the variety of life on Earth and the interactions between different species? a) Biodiversity b) Ecosystem c) Habitat d) Population
8. Which of the following is a non-renewable resource? a) Wind energy b) Natural gas c) Solar energy d) Geothermal energy
9. What is the term for the process by which water changes from a liquid to a gas? a) Evaporation b) Condensation c) Precipitation d) Transpiration
10. What is the term for the process by which nutrients are returned to the soil from decomposing organic matter? a) Nitrogen fixation b) Photosynthesis c) Decomposition d) Eutrophication