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Articles tagged as "Post 16"

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A science garden: illustrating various topics in biology

A science garden: illustrating various topics in biology

Ideas for plants for a science garden to illustrate topics including genetic variation, hybridisation, plant evolution, chimeras and mutation.


Investigating adaptation and defence - spines on holly leaves

Investigating adaptation and defence - spines on holly leaves

Holly trees are well known for their spiny leaves. In this investigation focusing on adaptation and defence, students consider whether there is a relationship between the number of spines on a leaf and its height above the ground.


Student Sheet 18 - Koch's Postulates

Student Sheet 18 - Koch's Postulates

Robert Koch was a bacteriologist who lived from 1843 to 1910. In his work on diseases, he was trying to establish whether a microbe, obtained from a diseased patient, was in fact the cause of the disease. This protocol allows students to demonstrate and test Koch’s Postulates, using apples infected with the fungus Penicillium expansum.


Measuring Stomatal Density

Measuring Stomatal Density

Stomata control the movement of gases in and out of a leaf, making carbon dioxide available for photosynthesis, and controlling the loss of water from the leaf through transpiration. There are a number of ways to measure stomatal density, and the different techniques are explored here. These include using clear nail varnish, Germolene New Skin and water-based varnish.


Microorganisms - a world in a hanging drop

Microorganisms - a world in a hanging drop

Do all microorganisms look the same? Can they move and change shape? What do they feed on? How small are they . . . and are they actually alive? This activities looks microorganisms under a microscope using the hanging drop technique.


Student Sheet 24 - Microscale Investigations with Catalase

Student Sheet 24 - Microscale Investigations with Catalase

A simple yet accurate protocol looking at the results of the enzyme catalase, found in nearly all aerobic cells (animals, plants and microbes).


Student Sheet 14 - Phosphatase Enzymes in Plants

Student Sheet 14 - Phosphatase Enzymes in Plants

A worksheet and accompanying teachers' notes looking at phosphatase enzymes extracted from germinating seeds.


Investigating mitosis in allium root tip squash

Investigating mitosis in allium root tip squash

A protocol allowing students to see mitosis in action.


Investigating osmosis: measuring the water potential of a potato cell

Investigating osmosis: measuring the water potential of a potato cell

Two methods to investigate osmosis and the water potential of a potato cell, including the standard measurement by weighing and the more visual, but challenging, Chardakov method.


Student Sheet 20 - Can plants make starch in the dark?

Student Sheet 20 - Can plants make starch in the dark?

Can plants make starch in the dark? In this practical, students investigate the conditions needed for starch production in a leaf, using leaf discs and carrying out the starch test. The resource includes worksheets and teachers' notes.


Student Sheet 3 - Investigating Photosynthesis with Leaf Discs

Student Sheet 3 - Investigating Photosynthesis with Leaf Discs

This teaching resource offers a fun, quantifiable and reliable way for students to get hands-on when investigating photosynthesis, by punching small discs out from leaves and watching them rise and fall as gas is evolved.


Understanding Photosynthesis: How Does Chlorophyll Absorb Light Energy?

Understanding Photosynthesis: How Does Chlorophyll Absorb Light Energy?

This overview for post-16 students, by Professor John Gray of the University of Cambridge, looks at how photosynthesis in more detail, focusing on how chlorophyll absorbs light energy, and the roles of photosystems I and II.


Fast plants for finer science - an article from the Journal of Biological Education

Fast plants for finer science - an article from the Journal of Biological Education

An article introducing 'fast plants' (rapid-cycling brassicas) for use in the classroom.


An Investigation into Leaf Surface Temperature

An Investigation into Leaf Surface Temperature

This practical is designed to be used as the opening lesson of the transport in plants section of the A level specification. It aims to engage the students in an investigation-based introduction to this topic rather than one based on content. The simple investigation will ask, “What happens to the surface temperature of leaves if petroleum jelly is applied to their lower surfaces?”


The inhibition of catechol oxidase by lead

The inhibition of catechol oxidase by lead

The enzyme, catechol oxidase, is easily extracted from banana. In this practical, students measure the extent to which lead inhibits the catechol oxidase.


Questions about Quadrats

Questions about Quadrats

Interdependence is one of the five key science ideas at KS3. Whilst this can be taught theoretically, some practical fieldwork greatly enhances pupils' understanding. Almost certainly the fieldwork would entail looking at plant abundance and distribution and, of course, some work with quadrats!


Ecology Practical 1 - Measuring abundance and random sampling

Ecology Practical 1 - Measuring abundance and random sampling

A simple onine ecology practical exercise, giving students an opportunity to practice random sampling to measure the abundance of various different species on an area of grassland, before they carry out practical fieldwork. Students will look at images of quadrats, identify the plants and measure the abundance.


'Algal balls' - Photosynthesis using algae wrapped in jelly balls

'Algal balls' - Photosynthesis using algae wrapped in jelly balls

This lively practical uses algae to look at the rate of photosynthesis. The algae are 'immobilised' in sodium alginate, and then used for the experiment.


'Algal balls' - Investigating photosynthesis and respiration: post-16 version

'Algal balls' - Investigating photosynthesis and respiration: post-16 version

This lively practical uses algae to look at the rate of photosynthesis. The algae are 'immobilised' in sodium alginate, and then used for the experiment. This version of the resource is specifically designed for post-16 students.


Student Sheet 2 - Growing and caring for rapid-cycling brassicas

Student Sheet 2 - Growing and caring for rapid-cycling brassicas

'Fast plants', or rapid-cycling brassicas, are a fascinating way to look at all sorts of biology topics, including plant growth, tropisms, floral reproduction, pollination, embryonic development, and genetics. This student worksheet introduces how to care for the rapid-cycling brassicas.

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