Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids
Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids
VISIT Burning substances in air and pure oxygen (video). goo.gl/sEV5g 4. A candle that is allowed to burn freely in air will eventually burn down and go out. Why does the candle stop burning in this situation? The fuel has run out What we have learned is that if you take away the fuel or the oxygen, burning will stop. For combustion to be possible, a heat source, fuel and oxygen are needed. Without one of the three, combustion will not happen. You can remember this using the Fire Triangle. All three sides of the triangle are required for combustion. 1.3 Safety with fire Teacher's Note The combustion triangle. Invite someone from the local fire department to come and talk to the children in your school. Ask them to bring their equipment and talk to them about fire safety. The fire department is normally very willing to visit schools and they are the experts. If the fire department is not available, a community member can also be asked to talk to the learners. We have spoken a lot about fire and burning in this chapter so far. Fire is amajor source of heat energy for many people whether it is 20 Energy and Change
for keeping warm, cooking food or for some other purpose. Although fire is very useful it is also very dangerous! Great care is needed when using fire. Fire is athreat in our communities. This is awildfire which has gotten out of control. 5 This is awarning in anature reserve during the dry summer months when fires can easily start up. 6 There are a few safety rules that everybody should know: 1. Never play with matches and lighters. Make sure that matches and lighters are kept out of reach of young children who do not know how to use them properly. 2. In case of fire - stay away. If there is afire in your home, do not hide, rather go outside as soon as possible. 3. Know the number of the local fire department and phone in case of emergency. 4. Have an escape plan for your home and practice it with your family. Have a meeting place outside so that you will know everyone is safe in the event of afire. ACTIVITY: Dangerous situations involving fire. INSTRUCTIONS: 1. Below are four dierent scenes. 2. Each one is potentially dangerous involving fire. Chapter 1. Stored energy in fuels 21
- Page 1 and 2: Natural Sciences and Technology Gra
- Page 3 and 4: AUTHORS LIST This book was written
- Page 5 and 6: THE NATURAL SCIENCES AND TECHNOLOGY
- Page 7: Matter and Materials and Structures
- Page 12 and 13: 1 Stored energy in fuels 4 KEY QUES
- Page 14 and 15: VISIT How fossil fuels are made. go
- Page 16 and 17: So we can say that food is the fuel
- Page 18 and 19: MATERIALS: • various packaging fo
- Page 20 and 21: Coal is not only burnt in our homes
- Page 22 and 23: 2. Remove both ends of the large ca
- Page 24 and 25: QUESTIONS: 1. Which fuel contained
- Page 26 and 27: INVESTIGATION: What happens when af
- Page 30 and 31: 3. Write a description next to each
- Page 32 and 33: 3. What causes of fire can you iden
- Page 34 and 35: 3. Some points to think about when
- Page 36 and 37: 1. Describe the relationship betwee
- Page 38 and 39: 2 Energy and electricity 30 KEY QUE
- Page 40 and 41: When the electrical energy is trans
- Page 42 and 43: A car needs energy to start its eng
- Page 44 and 45: Huge pylons carrying the transmissi
- Page 46 and 47: ACTIVITY: 10 Safety tips for electr
- Page 48 and 49: KEY CONCEPTS Never stick a metal kn
- Page 50 and 51: 3 Energy and movement 42 KEY QUESTI
- Page 52 and 53: 2. Tie another elastic band around
- Page 54 and 55: QUESTIONS Look up adefinition for p
- Page 56 and 57: 5. Place it in the water, and let i
- Page 58 and 59: QUESTIONS Use your knowledge of spr
- Page 60 and 61: 4 Systems for moving things 52 KEY
- Page 62 and 63: Teacher's Note You can demonstrate
- Page 64 and 65: QUESTIONS Label the two wheels and
- Page 66 and 67: 4. Place a few marbles or some othe
- Page 68 and 69: 6. Repeat this for the other 2wheel
- Page 70 and 71: The board makes bearings for the ax
- Page 72 and 73: INSTRUCTIONS: Things you can use fo
- Page 74 and 75: REVISION: 1. List four dierent vehi
VISIT<br />
Burning substances in<br />
air <strong>and</strong> pure oxygen<br />
(video).<br />
goo.gl/sEV5g<br />
4. A c<strong>and</strong>le that is allowed to burn freely in air will eventually<br />
burn down <strong>and</strong> go out. Why does the c<strong>and</strong>le stop burning in<br />
this situation?<br />
The fuel has run out<br />
What we have learned is that if you take away the fuel or the<br />
oxygen, burning will stop.<br />
For combustion to be possible, a heat source, fuel <strong>and</strong> oxygen are<br />
needed. Without one of the three, combustion will not happen.<br />
You can remember this using the Fire Triangle. All three sides of<br />
the triangle are required for combustion.<br />
1.3 Safety with fire<br />
Teacher's Note<br />
The combustion triangle.<br />
Invite someone from the local fire department to come <strong>and</strong> talk to<br />
the children in your school. Ask them to bring their equipment <strong>and</strong><br />
talk to them about fire safety. The fire department is normally very<br />
willing to visit schools <strong>and</strong> they are the experts. If the fire<br />
department is not available, a community member can also be<br />
asked to talk to the learners.<br />
We have spoken a lot about fire <strong>and</strong> burning in this chapter so far.<br />
Fire is amajor source of heat energy for many people whether it is<br />
20 Energy <strong>and</strong> Change
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