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Matter and energy in food webs

Food webs are models that demonstrate how matter and energy is transferred between producers, consumers, and decomposers as the three groups interact within an ecosystem. Transfers of matter into and out of the physical environment occur at every level. Decomposers recycle nutrients from dead plant or animal matter back to the soil in terrestrial environments or to the water in aquatic environments. The atoms that make up the organisms in an ecosystem are cycled repeatedly between the living and nonliving parts of the ecosystem.

Onderwerp en thema
Form 2
Biology
Balance of nature
Food chain and food web
Type bron
Video
Taal
English
Uitgever
Khan Academy
Publicatiedatum
2022
Schepper/Auteur
Sal Khan
Trefwoord
Food webs

The role of small and large scale farming

This 20 minute YouTube video explores the differences between small and large scale agriculture and the uses of each.

Onderwerp en thema
Form 2
Geography
Agriculture
Small scale agriculture
Type bron
Video
Taal
English
Uitgever
Geography with Dave
Publicatiedatum
2020
Schepper/Auteur
Rajendra Davechand
Trefwoord
Small scale agriculture
Large scale agriculture

Vernier scale use 0.02 scale measurement is 19.44

This diagram, Vernier scale use 0.02 scale measurement is 19.44 mm, illustrates how to read the length of the given object using vernier calliper.

Onderwerp en thema
Form 1
Physics
Measurement
Basic apperatus/equipments and their uses
Type bron
Media (afbeeldingen, foto's, illustraties, audio)
Taal
English
Uitgever
Wikimedia commons
Publicatiedatum
2011
Schepper/Auteur
Lookang
Bron
Trefwoord
Vernier
Calliper

Worked example: analysing a generic food web

We can analyse the arrows in a food web to identify producers, primary consumers, secondary consumers, and decomposers.

Onderwerp en thema
Form 2
Biology
Balance of nature
Food chain and food web
Type bron
Video
Taal
English
Uitgever
Khan Academy
Publicatiedatum
2022
Schepper/Auteur
Sal Khan
Trefwoord
Food webs

Worked example: analysing an ocean food web

We can analyse the arrows in a food web to identify producers, primary consumers, secondary consumers, and decomposers.

Onderwerp en thema
Form 2
Biology
Balance of nature
Food chain and food web
Type bron
Video
Taal
English
Uitgever
Khan Academy
Publicatiedatum
2022
Schepper/Auteur
Sal Khan
Trefwoord
Food webs