Grade 7: Eco Curriculum
• Natural hazards (e.g. drought, floods, earthquakes, volcanoes and tropical cyclones)
• simple explanations of how natural hazards occur – physical processes, climate change, poor environmental management
• management of risks and risk reduction – preventative measures (e.g. with regard to flooding, measures such as catchment management to improve the quality of rivers, vleis and wetlands, and reduce risk to human life and ecosystems).
Life and Living
Life processes and healthy living:
Summery: Without clean air, living beings cannot function properly. A proper respect for these resources should therefor be maintained.
• Animals as well as humans have a circulatory system which include the heart, veins, arteries and capillaries, and which carries nutrients and oxygen to all parts of the body and removes waste products. Oxygen, which is provided by the breathing system, reacts with food substances to release energy. (Links with soil in Planet Earth and Beyond)
Interactions in Environments:
Summery: A good bio-diversity is key to a healthy co-existence between living things.
• An ecosystem maintains numerous food webs and competition for food among different individuals and populations. Your country has certain ecosystems which have exceptional bio-diversity. All uses of these areas must be based on principles for sustainable development.
Bio-diversity, Change and Continuity:
Summery: Variation allows us to classify the various kinds of life on earth. The bigger the variety of elements in a particular environment, the stronger the chance for it to survive.
• Variation in human biological characteristics such as skin colour, height and so on have been used to categorise groups of people. These biological differences do not indicate differences in innate abilities of the groups concerned. Therefor such categorisation of groups by biological differences is neither scientifically valid nor exact; it is a social construct.
• Bio-diversity enables ecosystems to sustain life and recover from changes to the environment. Loss of bio-diversity seriously affects the capacity of ecosystems and the earth to sustain life. Classification is a means to organise the great diversity of organisms and make them easier to study. The two main categories of animals are the vertebrates and invertebrates, and among vertebrates the five classes are amphibians, birds, fish, reptiles and mammals.
The Planet Earth and Beyond
Atmosphere and weather
Summery: Prevalent atmospheric conditions determine the kind of life that it most likely would sustain.
• Climates varies in different parts of the globe. It tends to be cold in the polar regions and hot in the tropics. Different types of plants and animals are adapted to live in different climatic regions. (Links with Life and Living)
• The atmosphere protects the earth from harmful radiation and from most objects from outer space that would otherwise strike the earth’s surface. The atmosphere is the most important factor in keeping the earth’s surface temperature from falling too low or riding too high to sustain life.
The Economic Cycle:
Summery: Impact that wants has on environment and community
Explain needs and wants and how the differences between them impact on communities and the environment.