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Natural sciences

Grade 4

Matter, substances and materials

Module 57

The dangers of pollution

Activity:

To discuss the dangers of pollution and to try to make a difference

[lo 3.1.2, 3.2.1]

Unfortunately materials can cause pollution. We all know how important it is to preserve our environment and to prevent pollution as far as possible.

Let’s walk around the school grounds. Look around well and write down your findings.

Write down four things that you see on the school grounds.

Write down four things you saw which upset you or which could have a negative effect on our environment.

Choose one of the negative things and write a letter to the principal to make a suggestion on how the problem can be solved.

Dear ............................................................

Have the teacher or a member of the student council make an announcement about the problem and make an appeal to learners to do something about it.

Role-play: You are a television reporter. Report on the condition of the school grounds just after break.

Discuss ways of preventing pollution. Make a poster and stick it to the wall at the front of the class.

Discuss the use of rubbish removal by the municipality. Find out how rubbish was disposed of in the past and how standards of hygiene have improved over the years.

Let’s use waste material to make

Litterbug

  1. Get a large box and cover it with paper or cardboard that is going to be thrown away.
  2. Make a head on a smaller box and stick it onto the bigger box.
  3. Make a nose, eyes and mouth from waste material.
  4. Make arms, legs and feet.
  5. Keep him in a cupboard and collect recyclable material in him.

Make small stickers with ideas of how to combat pollution and hang them from a fishing line across the class. Use paper clips to hang them up.

Assessment

LEARNING OUTCOME 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.

Assessment standard

We know this when the learner

3.1 understands science and technology in the context of history and personal knowledge:

  • describes methods of sending messages over short and long distances.
  • understands the impact of science and technology: identifies features of technological devices around him or her, and tells about their purpose and usefulness:
  • suggests why having running water in a home might make people’s lives easier.

Memorandum

Pollution is a serious problem. If the youth understand this and do something about it then the problem can be controlled. Emphasise this frequently – it will keep the classroom, terrain and town tidier.

Litterlout

Make it a class activity. The children should enjoy it very much.

Questions & Answers

A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
Aislinn Reply
cm
tijani
what is titration
John Reply
what is physics
Siyaka Reply
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Jude Reply
Can you compute that for me. Ty
Jude
what is the dimension formula of energy?
David Reply
what is viscosity?
David
what is inorganic
emma Reply
what is chemistry
Youesf Reply
what is inorganic
emma
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
Krampah Reply
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
Sahid Reply
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
Samuel Reply
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Joseph Reply
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
Ryan
what's motion
Maurice Reply
what are the types of wave
Maurice
answer
Magreth
progressive wave
Magreth
hello friend how are you
Muhammad Reply
fine, how about you?
Mohammed
hi
Mujahid
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
yasuo Reply
Who can show me the full solution in this problem?
Reofrir Reply
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Source:  OpenStax, Natural sciences grade 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11096/1.1
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