<< Chapter < Page Chapter >> Page >

Natural sciences

Life and way of living

Educator section


  • 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


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. ______________________________________

Questions & Answers

what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!

Source:  OpenStax, Natural sciences grade 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11077/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Natural sciences grade 7' conversation and receive update notifications?