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Natural sciences

Planet earth and the universe

The inner planets

Educator section

Memorandum

Assignment 5:

1. Mercury

2. There is no oxygen and no water on Mars. The atmosphere is also too thin to keep out harmful UV rays.

3. Venus has almost the same mass and size as the earth.

4. Venus (sulphuric acid)

5. The orbit of Mars is much closer to the Sun than Neptune’s.

6. The Moon.

7. There is iron in the ground that gives it the red colour.

8. Sufficient oxygen and water; climate is suitable for vegetation, atmosphere correct depth and density.

9. If emergency signals are sent they reach the earth only two hours later. Sometimes the reception is very bad.

Total: 10

Assignment 6:

  • Use assessment matrix

Assignment 7:

1. Venus and the Moon.

2. 150 million km. This is the distance that the Earth is from the Sun and where we currently survive.

3. Mercury.

4. Venus and Mars lie on either side of the Earth, not too near or too far from the Sun.

5. Yes. The nearer the planet to the Sun, the higher the average speed.

6. Possible as a result of the gravity and energy of the Sun.

Four minutes.24 x 60 minutes = 1440 minutes (it takes the earth 24 hours to rotate on its own axis)1400 minutes divided by 360 degrees = 4 minutes.

Assignment 8.1:

Questions

1. Photographs show that there are dry river beds on Mars. All the water has frozen and is collected at the poles. We surmise that there were large seas and rivers. This water is now underground.

2. The average temperature is possibly higher.

3. Mars is further from the Sun and thus receives less energy from the Sun. Although the Sun is a huge source of energy it will one day shrink and weaken.

4. One would breathe with difficulty and take shallow breathes. One would die quickly as there is too much carbon dioxide in the air.

Assignment 8.2:

Questions

1. -60 degrees

2. Day 1 18:20

Day 2 10:45

3. Day 1 14:30

- 15 degrees

4. from 06:00

5. When there is a dust storm it absorbs heat from the Sun which causes the temperature to rise. There is also carbon dioxide in the Martian atmosphere and this can also raise the temperature.

  • Open answer; any realistic explanation.

Leaner section

Content

Activity: to discuss the planets of our solar system [lo 1.2, lo 1.3, lo 2.1, lo 2.2, lo 2.3]

  • Mercury

This is the closet planet to the sun. Mercury has many craters on its surface caused by asteroids which have collided with the planet. Mercury has no atmosphere or any moons. The temperature at the equator is approximately 400 degrees Celsius and at the poles it is –150 degrees Celsius.

  • Venus

Venus has an atmosphere of carbon dioxide that is much thicker than the earth’s atmosphere. The surface is hidden beneath thick clouds of sulphuric acid. Temperatures at the surface reach approximately 480 degrees Celsius. Venus is about the same size as the earth and has about the same mass.

  • Earth

As far as we know the earth is the only place in the universe where life occurs. Temperatures on the surface vary between 60 degrees and –90 degrees Celsius. Approximately two thirds of the surface is covered by liquid water.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
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
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
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 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11077/1.1
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