| << Chapter < Page | Chapter >> Page > |
Assignments:
1. Plants that are close to the soil surface will probably grow luxuriantly. Animals that live on snails, like centipedes, birds and mice would probably look for alternative feeding areas.
2.
| Earthworm | Round, elongated body facilitates making holes in the ground, carrying plant litter into the ground and ingesting it with the soil | Lives in damp soil to keep skin moist | System of tubes to control the amount of water that is taken in or lost |
| Locust | Can move around to look for food. Biting mouth parts for cutting up plant material | Tubes branch inside the body to provide a moist surface for gas exchange | External skeleton prevents loss of moisture. Obtains moisture from plant material |
| Spider | Learners simply summarise information from text. | ||
| Crab | |||
| Snail |
3. Research assignment: assess in terms of the framework supplied in the module.
The snail belongs to the group of molluscs or Mollusca . Can you still remember which other animals belong to this group?
The _____________________________ and ________________________________
It will not be difficult to find a garden snail. Look at its external build and try to answer the following questions:
The largest part of the body consists of a ______________________________ foot.
On the head are two ________________________________________________ and
two _________________________________________________________________
Place the snail on a glass plate and when it begins to move, look through the glass from below and describe what you see (how it moves).
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
Can you see its mouth? Describe. ________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
Lift the snail and try to look into the shell next to the body. Can you see an opening? This is the breathing opening.
Notification Switch
Would you like to follow the 'Natural sciences grade 7' conversation and receive update notifications?
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|