Forms and Transformations of Energy — O/L Science

What must I remember about Forms and Transformations of Energy?

• Energy forms: kinetic, potential (gravitational/elastic), thermal, chemical, electrical, nuclear, light, sound
• Conservation of energy: energy is never created or destroyed — only converted
• GPE = mgh; KE = ½mv²
• Efficiency = (useful output / total input) × 100%
• Power P = Energy / time (Watt = J/s)

Test yourself (1 minute)

1. Biomass pyramid

   wide base (producers) → narrow top (top consumers)

2. Renewable

   solar, wind, hydro, biomass; Non-renewable: coal, oil, gas, nuclear

Practise Forms and Transformations of Energy questions today

Must know

• Only ~10% energy transferred per trophic level; 90% lost as heat
• Joule (J) is the SI unit of energy; Watt (W) = Joule per second (power)

Source: NIE O/L Science — Unit 4: Energy in Ecosystems

What should I study first?

What comes next?

Next in the syllabus

Where does Forms and Transformations of Energy fit in the syllabus?

Grade 10 · Term 3