All 18 Core Practicals Archives - Snab Biology

Investigating Plant Mineral Deficiencies

SCL — Mon, 24 Apr 2017 18:29:45 +0000

Core Practical 7 – From Topic 4 (Biodiversity and Natural Resources) Aim To investigate the effect of plant mineral deficiencies on plant growth. Independent Variable Minerals present Dependent Variable Physical characteristics of the plant Control Variables Volume of mineral solution used – half a test tube will be filled with each Same species of the...

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Investigating Habituation to a Stimulus

Dr. Isa — Fri, 19 May 2017 16:03:04 +0000

Core Practical 18 – From Topic 8 (Grey Matter) Aim To investigate habituation to a stimulus in snails. Independent Variable The number of pokes with a cotton wool bud Dependent Variable Time taken for the eye stalks to reemerge from the shell (measured in seconds using a stopwatch) Control Variables Age and size – snails...

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Why Revise The Core Practicals?

Dr. Isa — Sun, 22 Jan 2017 15:05:09 +0000

As well as providing you with the information for before you carry out your practicals, we strongly recommend that you go over the practicals for any tests (including mocks). So you may or may not know that the SNAB A level exams include 3 biology papers which test you from topics 1 to 8. So why...

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The Effect of Temperature on Cell Membranes

Dr. Isa — Sun, 29 Jan 2017 18:51:53 +0000

SNAB's beetroot core practical

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Measuring the Content of Vitamin C in Fruit Juice

Dr. Isa — Fri, 27 Jan 2017 22:18:59 +0000

Salters-Nuffield Core Practical - Vitamin C Content

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Effect of Caffeine on Daphnia Heart Rate

Dr. Isa — Mon, 23 Jan 2017 17:13:40 +0000

SNAB's Daphnia core practical information

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The Effect Of Changing Enzyme Concentration On The Rate of Reaction

SCL — Fri, 03 Feb 2017 22:32:18 +0000

SNAB's core practical for changing enzyme concentration.

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Observing Mitosis

Dr. Isa — Tue, 07 Feb 2017 20:48:15 +0000

SNAB's observing mitosis core practical.

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Looking At Plant Stems

SCL — Sun, 23 Apr 2017 13:43:35 +0000

Core Practical 6 – From Topic 4 (Biodiversity and Natural Resources) Aim To identify sclerenchyma fibres, phloem sieve tubes and xylem vessels and their location within stems through a light microscope. Equipment Small piece of tinned rhubarb Microscope slide Coverslip 2 mounted needles Forceps Watch glass Methylene blue (1% solution) 50% glycerol Filter paper Method...

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The Strength Of Plant Fibres

SCL — Wed, 26 Apr 2017 12:56:10 +0000

Core Practical 8 – From Topic 4 (Biodiversity and Natural Resources) Aim To determine the tensile strength of plant fibres. Independent Variable The type of fibre used (from different plants) Dependent Variable The amount of mass that can be added before the fibre snaps Control Variables Length of fibre – each fibre should be roughly...

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