SCIENCE TERM THREE WEEK 2 H/W 1 BASIC SEVEN WEDNESDAY, 20TH MAY, 2026. FORCES AND ENERGY SOURCES OF ENERGY 1i. Which class of energy source can be called sustainable source of energy? 1ii. Explain the answer given in 1i above. 1iii. Explain why hydro is considered as renewable source of energy.

1i. Renewable energy sources

1ii. Renewable energy sources are considered sustainable because they naturally replenish over a relatively short period, ensuring their availability for future use without being depleted.

1iii. Hydroelectric power is considered renewable because it relies on the continuous water cycle. Water evaporates, forms clouds, precipitates as rain or snow, and flows through rivers, constantly replenishing the water supply used to generate electricity.