O Level Science Notes Archives - Page 32 of 33 - Free ZIMSEC & Cambridge Revision Notes

Respiration
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Respiration

Notes, O Level Science Notes, Ordinary Level Notes

Respiration

By garikaib|2022-09-15T12:41:45+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Respiration

During the gaseous exchange process oxygen is taken into the body and carbon dioxide is expended.
Oxygen is needed to burn fuels to release energy.
Food is a fuel and oxygen is used by th cells to “burn” the fuel.
The burning process is very slow and there are not flames involved.

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Plant adaptations to transipiration

By garikaib|2022-09-15T12:40:48+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Cacti plants have adapted to desert conditions. Image credit f-lohmueller.de ZIMSEC O Level Combined Science Notes: Plant adaptations to transpiration

Plants that live in extreme weather conditions have adapted as they have lived in these conditions for a long time.
In places such […]

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The germination process

By garikaib|2022-09-15T12:40:33+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Seed germination. Image credit k8schoollessons.com ZIMSEC O Level Combined Science Notes: Reproduction in plants: Reproduction in Plants:The germination process

Germination- is the beginning of growth in a plant.
is the process by which a plant grows from a seed
When the seeds that are released by plants fall […]

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Experiment: Calculating the water and organic content of soil

By garikaib|2022-09-15T12:40:24+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Soil has got organic content. Image credit manicapost.com ZIMSEC O Level Combined Science Notes: Experiment: Calculating the water and organic content of soil

Materials: soil sample, burner, balance, evapourating dish basin, tongs, water bath

Method

This burns off the organic content of the soil
Roast the […]

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Latent heat

By garikaib|2022-09-15T12:40:14+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Boiling water. Image credit chemistryland.com ZIMSEC O Level Combined Science Notes: Latent Heat

when heat is applied to a material the temperature of that material increases
if the heat is removed and the material is allowed to cool then there is a decrease in that material’s temperature
however […]

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Experiment:Making a mixture and compound

By garikaib|2022-09-15T12:39:48+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

The iron and sulpher mixture glows when heated as it forms a compound ZIMSEC O Level Combined Science Notes: Experiment:Making a mixture and compound

Aim: To Make a mixture of iron and sulpher and change it into a compound using […]

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Experiment: Reducing Copper oxide with carbon
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Experiment: Reducing Copper oxide with carbon

Notes, O Level Science Notes, Ordinary Level Notes

Experiment: Reducing Copper oxide with carbon

By garikaib|2022-09-15T12:39:34+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Experiment: Reducing Copper oxide with carbon

Aim: To reduce copper oxide with carbon

Materials: black copper oxide, tongs, crucible lid, powdered carbon, burner

Carbon can be used to reduce copper oxide

Method

Mix the copper oxide and powdered carbon together in the crucible […]

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Experiment: Determining how concentration affects rates of reaction

By garikaib|2022-09-15T12:39:26+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

The rate of reaction increases with an increase in concentration ZIMSEC O Level Combined Science Notes: Experiment: Determining how concentration affects rates of reaction