December 2015

Diffusion and Osmosis experiments: Visking Tubing/Egg membrane

By |2017-01-17T11:16:13+02:00December 31st, 2015|Notes, O Level Science Notes, Ordinary Level Notes|

A person tying the visking tubing. Image credit YouTube.

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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The movement of molecules in plants: Diffusion

By |2017-01-17T11:16:14+02:00December 31st, 2015|Notes, O Level Science Notes, Ordinary Level Notes|

Coloured ink droplets falling and diffusing in a glass of water. Image credit pinterest.com

Coloured ink droplets falling and diffusing in a glass of water. Image credit pinterest.com ZIMSEC O Level Combined Science Notes:The movement of molecules
  • Both plants and animals contain a large amount of water in their tissue.
  • Plants like […]

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August 2015

Examining the structure of stems and roots

By |2017-01-17T11:17:54+02:00August 31st, 2015|Notes, O Level Science Notes, Ordinary Level Notes|

Tree roots. Image credit lawnsite.com

Tree roots. Image credit lawnsite.com ZIMSEC O Level Combined Science Notes: Examining the structure of stems and roots

Aim: To examine the structure of roots and stems under a microscope/bio-viewer.

Materials: Bio-set and bio-viewers, microscopes, prepared slides of root and stem sections.

Method


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Investigating the movement of water within plants

By |2017-01-17T11:17:55+02:00August 30th, 2015|Notes, O Level Science Notes, Ordinary Level Notes|

A celery plant in dye. Image credit wordpress.com

A celery plant in dye. Image credit wordpress.com ZIMSEC O Level Combined Science Notes: Investigating the movement of water within plants

Aim: To demonstrate that moves up plants which have a transportation system.

Materials: Young plants with roots/celery plants, water, hand lenses, razor blade/scalpel, food colouring/dye.

Method

  1. Place […]

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Plant transport and the structure of plants

By |2017-01-17T11:17:55+02:00August 30th, 2015|Notes, O Level Science Notes, Ordinary Level Notes|

tomato_plant-min

Tomato Plant. image credit wisegeek.com ZIMSEC O Level Combined Science Notes: Plant transport and the structure of plants
  • Plants have two main organ systems: a shoot system and a root system

Tomato plant structure. Image credit uic.edu

Tomato plant structure. Image credit […]

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