After watching the video clip, ask the learners whether they have changed their beliefs about whether there is life on other planets.
Present an overview of the requirements for sustaining life by PRESENTATION 4: Requirements for sustaining life.
Learner Activity 4
Hand out WORKSHEET C for learners to complete. (WORKSHEET C MEMORANDUM provides possible answers).
Teacher Input 6
Tell learners that now that we know what living things need from the environment to survive, we sometimes need to adapt our ways in order to survive in our environment.
Can anyone think of ways in which we as humans adapt to fit in with the environment. Answers could include:
We build shelters.
In South Africa we build houses from wood, tin or brick (or even eco-bricks)
In certain parts of America, people build houses exclusively from wood, because they are plagued by hurricanes and tornado’s – houses therefore must be easy to rebuild. A hurricane is a huge storm. It can be up to 600 miles across and have strong winds spiralling inward and upward at very high speeds. Each hurricane usually lasts for over a week, moving very fast across the open ocean. Hurricanes gather heat and energy through contact with warm ocean waters. A tornado is a violent rotating column of air extending from a thunderstorm to the ground. The most violent tornadoes are capable of tremendous destruction with exceptionally high wind. They can destroy large buildings, uproot trees and hurl vehicles hundreds of metres.
Wood performs much better in a dynamic environment, like high winds or earthquakes. It can flex and snap back, unlike masonry, which cracks and crumbles. It is possible to build a masonry wall that will perform well under these conditions, but – especially in the case of earthquakes –it is very expensive to do so.
We wear appropriate clothing
Would you go to space without a space suit?
Would an Eskimo wear a pair of shorts?
Would you wear summer clothes in the desert?
Tell learners that both animals and humans adapt to the environment.
Present an overview of how animals adapt to the environment by using PRESENTATION 5: Animal Adaptations.
Learner Activity 5
Hand out WORKSHEET D for learners to complete.
The memorandum for this worksheet (WORKSHEET D MEMORANDUM) provides a guideline, but any suitable answers given by the learners should be accepted. Teacher to use own discretion when assessing this worksheet.