1.7 General science

Natural sciences

Life and way of living

Educator section

Memorandum

• Locust:
• No, yes, 6

1. Large: 2

Small: 3

2. Three

3. Four

4. No. Forewings hard and leathery, rear wings soft/delicate and can be opened out to form a large surface area

5. Like plastic, hard

6. Feelers

7. No. There are spiracles on each segment of the abdomen.

8. Yes. Mouth parts are located at the bottom of the head. Cutting edges and feelers.

9. 6 legs.

10. No. The rear legs are stronger.

11. No. The females and males differ. The female locust has an ovipositor and the male has a copulatory organ.

12. Protection: hard external skeleton, but it can use the feelers for feeling. Does not lose moisture, can cope without water. Can move around easily: walks, sometimes flies of jumps. Can look for food because of its locomotive ability, can see, has good mouth parts.

13. The learner should draw from life. If possible, a real creature must be observed.

14. Life cycle: adult, eggs, larva, pupa

Assignment 3:

• Dependence on water: able to survive dry conditions, able to live in environments where there is no vigorous competition from other animals. Exoskeleton prevents loss of moisture, eats plants that contain sufficient water.

• Obtaining food: locusts are able to move fast and far to look for food. Eggs can survive dry conditions and hatch when the soil is becomes moist (rain) and plants are green.

• Insects that display complete metamorphosis: survive in the form of a pupa, eggs hatch when food is available.

• Respiration: tubes in the body transport the gases. They remain moist (do not dry out as easily as the earthworm).

• Senses and communication: smells and feels with help of antennae; has a tympanic membrane (eardrum) on the first segment of the abdomen, creates sound by rubbing the rear legs against the rough wings (locust; other insects differ, but the main thing is that they are able to communicate).

Leaner section

Content

Activity 8: to investigate and describe the grasshopper’s ability to survive [lo 1.1, lo 1.2, lo 2.3, lo 2.4]

The grasshopper

The grasshopper belongs to the largest group in the animal kingdom, namely the insects.

What do you already know about this group?

• Spinal column: yes or no?_____________________________________________
• Legs: articulated or not?______________________________________________
• Number of legs:_____________________________________________________

Investigation : Catch a few different types of insects and bring them to class. Form groups of two or three and study the insect in the group of which the body parts can be distinguished easily. A grasshopper or a cricket works well. Answer the following questions (try your best to give a good answer so that you can get a good mark):

1. An insect has large as well as small eyes.

• Large: ___________________________________
• Small: ___________________________________

2. In how many main parts would you divide the body? _______________________

3. How many wings does the insect have? If the wings are folded against the

body, lift them up and look carefully. ______________________________________