O Level Science Notes Archives - Page 31 of 33 - Free ZIMSEC & Cambridge Revision Notes

Light and photosynthesis

By garikaib|2025-02-12T09:39:29+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Potted plant. Image credit hotstyledesign.com ZIMSEC O Level Combined Science: The test for starch

Aim: To test whether light is required for the photosynthesis process.

Materials

A potted plant, cardboard or aluminum foil, scissors, paper clips or tape, equipment for the start test.

Method Image credit [...]
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Kupatsanura Zviito

By garikaib|2025-02-12T09:26:50+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Image credit necessarywriters.com ZIMSEC O Level Shona Notes: Kupatsanura Zviito

Chiito chega chega chinogona kupatsanurwa tichibuditsa chidumbu chimwe nechimwe chakachiumba.
Zvidimbu izvi zvinonzi zvivakiso kana kuti zvivakazwi.
Chivakazwi chimwe nechichimwe chinenge chiine basa rachinoita pachiito chachinovanikwa.
Pabvunzo dzeShona panogona kuuya mubvunzo unenge uchida kuti iwe upatsanure chiito uchibuditsa zvivakazwi zvinenge zvakachiumba.
Unofanira […]

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Diffusion and Osmosis experiments: Visking Tubing/Egg membrane

By garikaib|2025-02-12T09:05:48+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

A person tying the visking tubing. Image credit YouTube. ZIMSEC O Level Combined Science Notes:Diffusion and Osmosis experiments

Aim: Create a membrane model for molecules and their movement.

Materials

Visking tubing/egg membrane, string, beaker, 20% sugar solution, weighing balance, water.

Method A

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Examining adaptations of flowers to pollination

By garikaib|2025-02-12T09:25:46+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

A bird pollinating a flower. Image credit gilligalloubird.com ZIMSEC O Level Combined Science Notes: Reproduction in plants: Examining adaptations of flowers to pollination

Materials: maize(male and female) or any type of grass flowers, bean flowers or any insect pollinated flowers, hand lenses, microscope slides, […]

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Experiment: Testing the infiltration capacity of soils

By garikaib|2025-02-12T09:44:29+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Testing infiltration in soils ZIMSEC O Level Combined Science Notes: Testing the infiltration capacity of soils

Materials: Tins with their tops and bottoms removed, water

Method

Gently push the tins into the ground, make sure that they are in different soil types
Pour 100ml of water into the cylinders and measure […]

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Isotopes and the importance of proton numbers

By garikaib|2025-02-12T09:06:50+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

The three isotopes of hydrogen. Image credit MediaWiki ZIMSEC O Level Combined Science Notes: Isotopes and the importance of proton numbers

The electron orbits of these two elements is small and can only carry two electrons
The next element in the series is lithium
It comes […]

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The relationship between a beam’s strength and depth

By garikaib|2025-02-12T09:14:03+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

The greater the depth of a beam the more load it can support ZIMSEC O Level Combined Science Notes: The relationship between a beam’s strength and depth

A beam is stronger if it’s depth if it has greater depth
For […]

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Predicting reactions of a metal using the reactivity series

By garikaib|2025-02-12T09:40:26+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

The reactivity series. Image credit wordpress.com ZIMSEC O Level Combined Science Notes: Experiment: Predicting reactions of a metal using the reactivity series

Metals do not react with water and air at the same rate
The rate at which they react differs from metal to metal
Some metals […]

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Experiment: Investigating the neutralisation process
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Experiment: Investigating the neutralisation process

Notes, O Level Science Notes, Ordinary Level Notes

Experiment: Investigating the neutralisation process

By garikaib|2025-02-12T09:10:28+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Experiment: Investigating the neutralisation process

Aim: To find out what happens to the pH of an acid when a base is added

Materials: vinegar, plastic beaker, measuring cylinder, stirring rod, spatula/plastic teaspoon, slaked lime (calcium hydroxide), universal indicator paper

Method