Hydrogen fuel cells generate electricity by combining hydrogen (H₂) with oxygen (O₂) from the air, producing only water as a byproduct.
| Term | Match with Definition | |------|----------------------| | Fossil fuel | C. Formed from ancient organisms | | Nonrenewable | E. Fixed amount, cannot be replaced quickly | | Renewable | A. Replenished naturally in short time | | Nuclear fission | D. Splitting atomic nuclei | | Hydroelectric | B. Energy from flowing water | | Geothermal | F. Heat from Earth’s interior | section 15.3 energy resources answer key pdf
Answer: Nuclear energy has high energy density and low greenhouse gas emissions, but it also poses safety concerns and nuclear waste disposal challenges. Fixed amount, cannot be replaced quickly | | Renewable | A
A1: A renewable energy resource can be replenished naturally within a human lifetime (e.g., solar, wind). A nonrenewable energy resource exists in finite amounts and takes millions of years to form (e.g., coal, oil, natural gas). Energy from flowing water | | Geothermal | F