August 2015

The structure of the leaf and photosynthesis

By |2022-09-15T12:41:55+02:00August 10th, 2015|Notes, O Level Science Notes, Ordinary Level Notes|

The external structure of the leaf. Image credit passmyexams.co.uk

The external structure of the leaf. Image credit passmyexams.co.uk ZIMSEC O Level Combined Science Notes: The structure of the leaf and photosynthesis
  • The leaves are the main organs of photosynthesis.
  • Their structure is adopted for the process of photosynthesis.
  • Veins-vein networks support the physical structure […]

    Quick NetOne, Econet, And Telecel Airtime Recharge

Comments Off on The structure of the leaf and photosynthesis

End products of photosynthesis and their fate

By |2022-09-15T12:41:55+02:00August 10th, 2015|Notes, O Level Science Notes, Ordinary Level Notes|

Image credit arboday.org

Image credit arboday.org ZIMSEC O Level Combined Science Notes: End products of photosynthesis and their fate
  • Green leaves manufacture starch or sugar during the photosynthesis process
  • Oxygen is also given out.
  • The oxygen passes out of the leaves by the process of diffusion.
  • It diffuses into the surrounding air.
  • There are microscopic […]

    Quick NetOne, Econet, And Telecel Airtime Recharge

Comments Off on End products of photosynthesis and their fate

Chlorophyll and Photosynthesis

By |2022-09-15T12:41:55+02:00August 9th, 2015|Notes, O Level Science Notes, Ordinary Level Notes|

A green leaf. Image credit wallconvert.com

A green leaf. Image credit wallconvert.com ZIMSEC O Level Combined Science: Chlorophyll and Photosynthesis

Aim: To test whether chlorophyll is necessary for photosynthesis.

Materials

Two plants with variegated leaves i.e. leaves that are partly green, permanent marker  and equipment for the start test.


Quick NetOne, Econet, And Telecel Airtime Recharge

Comments Off on Chlorophyll and Photosynthesis

Light and photosynthesis

By |2022-09-15T12:41:56+02:00August 9th, 2015|Notes, O Level Science Notes, Ordinary Level Notes|

Potted plant. Image credit hotstyledesign.com

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


Quick NetOne, Econet, And Telecel Airtime Recharge

Comments Off on Light and photosynthesis

Carbon Dioxide and Photosynthesis

By |2022-09-15T12:41:56+02:00August 9th, 2015|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science: Carbon Dioxide and Photosynthesis

Aim: To test whether carbon dioxide is necessary for photosynthesis.

Materials: Potted green plants, potassium hydroxide solution (soda lime), two polythene bags/two bell jars, string, apparatus and reagents for the start test.


Quick NetOne, Econet, And Telecel Airtime Recharge

Comments Off on Carbon Dioxide and Photosynthesis

Factors,Inputs and outputs of photosynthesis

By |2022-09-15T12:41:57+02:00August 9th, 2015|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science: The test for starch

The requirements of photosynthesis
  • As already mentioned the food making process in plants is called photosynthesis.
  • In order for a plant to […]

    Quick NetOne, Econet, And Telecel Airtime Recharge

Comments Off on Factors,Inputs and outputs of photosynthesis

The Test for starch

By |2022-09-15T12:41:57+02:00August 9th, 2015|Notes, O Level Science Notes, Ordinary Level Notes|

  • During the process of photosynthesis, a plant absorbs, a process which is aided by the presence of chlorophyll in the leaf
  • This enables the plant to convert carbon dioxide and water into glucose
  • Some of this glucose is used up by the plant however
  • Any excess is turned into starch for storage
  • You can, therefore, test a plant’s leaf for starch in […]

    Quick NetOne, Econet, And Telecel Airtime Recharge

Comments Off on The Test for starch

Photosynthesis

By |2022-09-15T12:41:57+02:00August 9th, 2015|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science: Photosynthesis

  • Green plants are the food and oxygen producers of the living world.
  • They manufacture organic molecules from inorganic raw materials.
  • Animals rely on green plants to make food that provides them with energy and oxygen.
  • Green plants are thus known as producers and animals are in turn known as consumers.
  • Only green plants […]

    Quick NetOne, Econet, And Telecel Airtime Recharge

Comments Off on Photosynthesis
Go to Top