23 May, 2025
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- Explain the concept of diffusion and provide an everyday example. (3 marks)
- Name two properties of a good electrical conductor. (2 marks)
- Briefly explain how a simple periscope works. (2 marks)
- State two negative impacts of deforestation on the environment. (2 marks)
- Describe the role of decomposers in an ecosystem. (2 marks)
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INTEGRATED SCIENCE | GRADE 9 | MODEL 01
POTENT ACADEMY REVISION SERIESINTEGRATED SCIENCEGRADE 9 | MODEL 01Name________________________________________________ Date…
Hi Let me attempt
Diffusion: Diffusion is the movement of particles from a region of higher concentration to a region of lower concentration.
Every day example is how smell of perfume moves from where it is sprayed to nearby places.
Properties of a good electrical conductor:
– High electrical conductivity.
– Low electrical resistance.
Simple periscope working: A simple periscope uses two mirrors placed parallel to each other at a 45-degree angle to allow viewing of objects obstructed by a direct line of sight. Light from the object reflects off the top mirror downwards to the bottom mirror, which then reflects it to the viewer’s eye.
Negative impacts of deforestation:
Loss of biodiversity and habitat destruction.
Increased soil erosion and flooding.
Role of decomposers: Decomposers (like bacteria and fungi) break down dead organic matter, releasing essential nutrients back into the soil for producers/ plants to use.
Well explained… 💯