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Technology

Grade 8

Recycling

Module 17

Our land – a garbage dump

Our land - A garbage dump?

In the typical South African household people haul bags of waste out to the rubbish bin which is collected by municipal crews in waste removal trucks. Is this the end of it?

As the population of South Africa increases by the day, so too do the mountains of waste. This results in too much waste for the landfills that municipalities operate. Luckily there are people who are concerned about where all this waste goes and where it will go in future.

Recycling is not the only solution to the waste problem but it is something everybody can do to help make the world a better place. It involves the re-use of household and industrial materials, such as plastic and paper products. It not only helps to cut waste, but also reduces our use of resources and lessens the pollution that results from processing those sources. Many people in South Africa collect recyclable material like paper, glass, plastic and metal to earn money. Others simply throw their recyclable waste in special containers to be recycled. It does not matter how you help the process of recycling materials, as long as you do it. It is good for the environment.

Activity 1

To demonstrate knowledge and understanding of what recycling is and the route rubbish should go

LO 1.1

1.1 Define the term “recycling”.

1.2 Draw a flow-chart of the route plastic, glass, paper and metal waste normally follows from the shop to the landfill.

1.3 Draw a flow-chart to indicate the route that waste containers should follow to help save our environment.

1.4 Draw the recycling emblem on a folio paper.

1.5 Write a paragraph entitled: Reasons for recycling .

Activity 2

To perform tests to see what materials and what quantities of waste are generated at home in order to form an opinion about the impact of products of technology on the quality of people’s lives and the environment in which they live

LO 3.2
  • Take three empty cardboard boxes and label them PAPER, METAL (CANS) and PLASTIC. Collect and weigh recyclable waste for one week in your home and place it in these boxes. Use the table below and weigh the amount of waste each day. Place the waste in three different bags after you have weighed it and place them in mass waste containers in your town.

Table 1

Household Recycle Data

Recyclable waste Sun Mon Tue Wed Thurs Fri Sat Total
Metal (kg)
Paper (kg)
Plastic (kg)

Combine the data of all members of the class and calculate the total kilograms of waste collected by the class. In table 2 you can now calculate the total value of the waste your class has collected.

Table 2

Household Recycle Data

Recyclablewaste Total Quantity (kg) Price per KG Total
Metal (aluminium) R8,20
Paper 55c
Plastic 85c

2.1 Calculate how much a person will earn who collects 750 kg of metal a week.

2.2 Design a graph to illustrate the data from table 2.

2.3 Which material creates the most waste?

2.4 Which material is the most profitable to collect and sell?

Activity 3

To demonstrate an understanding of how materials (plastics) can be recycled

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, Technology grade 8. OpenStax CNX. Sep 13, 2009 Download for free at http://cnx.org/content/col11052/1.1
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