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Natural sciences

Grade 9

The earth,galaxies ans space programmes

Module 15

Planets of our solar system

The following diagram shows the inner planets of our solar system:

Statistics of


  1. How many planets revolve around the sun? ……………………………………………………

2. Which planet is closest to the sun?

3. Which planet is furthest from the sun in the diagram? ………………………………………..

  1. What is the shape of the planets’ orbits?

5. Which planet is called the earth’s twin because it looks the same from space?

6. Which planet of this group has features that show the greatest resemble to those of the earth?

Activity: Draw the orbits

[LU 2.1]

The following diagram shows the outer planets of our solar system.

Statistics of the outer planets


Which planet …

1. has a red spot?

2. has rings of ice?

3. has the strongest winds?.

4. has the largest mass?

5. has the most moons?

6. is the coldest?

7. has the largest diameter?

8. has the highest temperature?

9. has a moon with an atmosphere? .

10. has a moon larger than another planet?

Assessment of QUESTIONS ON PLANETS: Did you answer the questions correctly? [ LO 2.3]

Activity: CALCULATING DISTANCES (interpretation task)


1. Study the above values and suggested distances from the sun.

1 cm = 1 Astronomical unit

Identify the planets:

A __________________

B ____________________

C _______________

D _________________

2. Arrange the planets from the largest to the smallest.

3. What planet is 5 times further than the earth from the sun?

4. What planet is 30 times further than the earth from the sun?

5. The gravity of Mars is 0,39 that of the earth. If you weigh 100 kg on earth, you would weigh 100 x 0,39 kg, i.e. 39 kg, on Mars.

How much do you weigh on earth? ……………………………

Calculate how much you would weigh on the following planets and complete the table:

6. On which planet would you:

(a) weigh the least?

(b) weigh the most?


Did you do the conversions correctly? Could you categorise the information?

[LO 2.2; LO 2.4]

Activity : GROUP WORK


  • You can work in groups to construct
  • a complete solar system
  • only the inner planets
  • only the outer planets
  • individual planets
  • The project must be three-dimensional, colourful and of use to the educator.
  • Suggestion: Use paper maché and water paint.
  • Colours must be selected according to the features of the planet.


Did you a) plan how you would obtain information, b) collect information and c) communicate information and findings?

[LO 1.1; LO 1.2; LO 1.3; LO 3.1]


LO 1: Scientific investigations:

The learner will be able to act confidently on curiosity about natural phenomena, and to investigate relationships and solve problems in scientific, technological and environmental contexts.

This is evident when the learner:

  • plans investigations;
  • conducts investigations and collects data;
  • evaluates data and communicates findings.

LO 2: Constructing Science Knowledge:

The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

This is evident when the learner:

  • recalls meaningful information;
  • categorises information;
  • interprets information;

2.4 applies knowledge.

LO 3: Science, Society and the Environment

The learner will be able to demonstrate an understanding of the interrelationships between science and technology, society and the environment.

This is evident when the learner:

3.1 understands science as a human endeavour.


The planets of our solar system


1. 9

2. Mercury

3. Neptune

4. elliptical

5. Venus

6. Mars

ACTIVITY: QUESTIONS – Which planet….

1. Jupiter

2. Saturn

3. Neptune

4. Jupiter

5. Saturn

6. Neptune

7. Jupiter

8. Mercury

9. Saturn's Titan

10. Ganymede, of Jupiter, is the largest one in our galaxy and is bigger than Mercury


1. A = Mars ( 1,6 x 150 milj)B= JupiterC = UranusD= Pluto

2. Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars, Mercury, and Pluto

3. Jupiter

4. Neptune

5. Each according to its own mass

6a) Pluto

6b) Jupiter

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
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Source:  OpenStax, Natural sciences grade 9. OpenStax CNX. Sep 15, 2009 Download for free at http://cnx.org/content/col11069/1.1
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