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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

Transformation geometry

In this lesson you will learn about:

  1. Enlargement and reduction of shapes using a scale factor.
  2. Reflection of geometric shapes.
  3. Translation of geometric shapes.
  4. Rotation of geometric shapes.
Onderwerp en thema
Form 2
Mathematics
Geometrical transformations
Translation
Type bron
Cursus
Taal
English
Publicatiedatum
2023

Translations

This online lesson explores the concept of translations.

Onderwerp en thema
Form 2
Mathematics
Geometrical transformations
Translation
Type bron
Cursus
Taal
English
Uitgever
CK-12
Publicatiedatum
2022
Schepper/Auteur
CK-12
Trefwoord
Translations

Units of time

Outcomes

By the end of this course you will:

  • Know what the 12 hour and 24 hour clocks are respectively
  • Be able to convert times from the 12 to 24 hour clock and vice versa
  • Be familiar with the units of time
  • Learn how to convert one unit of time to another
Onderwerp en thema
Form 1
Mathematics
Units
Units of time
Type bron
Cursus
Taal
English
Publicatiedatum
2023

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