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
The board makes bearings for the axles which are fixed to the wheels. The axles turn in the holes. The next picture shows you the other way to let the wheels turn. This time the axle remains still and the wheels turn on the axle. The axle is fastened to a wooden body with cable clips. Cable clips fasten telephone cables to walls. Can you see the blown up version of acable clip? The clips may hold the axle tightly, so the wheels must be free to rotate. How the cable clips can hold an axle. 62 Energy and Change A clip to hold telephone cables to the wall.
ACTIVITY: Making and evaluating dierent wheels and axles. Teacher's Note This activity does not follow a Technology Design process with all the steps, but does involve investigating, making and evaluating dierent objects to make wheels and axles and then using their best option to make an improved tractor from what they first made in the beginning of this chapter. Ask learners to collect the materials for wheels and axles from home beforehand – tell them to also use their imaginations when looking for dierent materials to use. You will also need to supply some of the materials below. MATERIALS: • things to collect for wheels: shoe-polish tins, the lids of bottles, cut out cardboard circles. • things to collect for axles: sosatie sticks, sti plastic straws, wooden dowel sticks, aluminium rods, nails or wire, or the school may have plastic rods from a supplier. • scissors • glue • tape • pencils and crayons • a small box Chapter 4. Systems for moving things 63
- 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 28 and 29: VISIT Burning substances in air and
- 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 72 and 73: INSTRUCTIONS: Things you can use fo
- Page 74 and 75: REVISION: 1. List four dierent vehi
- Page 78 and 79: 1 Planet Earth 70 KEY QUESTIONS •
- Page 80 and 81: • The Earth spins right around in
- Page 82 and 83: 3. Was it daytime in Saudi Arabia?
- Page 84 and 85: VISIT Short video showing the sun,
- Page 86 and 87: The planets move in orbits around t
- Page 88 and 89: MATERIALS: • 100m heavy string
- Page 90 and 91: Teacher's Note Make sure to point o
- Page 92 and 93: 2 Surface of the Earth 84 KEY QUEST
- Page 94 and 95: QUESTIONS: 1. What is under the flo
- Page 96 and 97: Imagine we could cut aslice out of
- Page 98 and 99: QUESTIONS 1. If you dig ahole in th
- Page 100 and 101: Teacher's Note Iron melts at those
- Page 102 and 103: The hole will come to of the other
- Page 104 and 105: Look at the place where the water h
- Page 106 and 107: VISIT Rocks erode to form soil (vid
- Page 108 and 109: ACTIVITY: Make a model of acid wate
- Page 110 and 111: ACTIVITY: Look at dierent kinds of
- Page 112 and 113: MATERIALS: • 3 big cool drink bot
- Page 114 and 115: In the beginning, you might think t
- Page 116 and 117: The topsoil has gone from this land
- Page 118 and 119: INSTRUCTIONS: 1. Collect two tins o
The board makes bearings for the axles which are fixed to<br />
the wheels. The axles turn in the holes.<br />
The next picture shows you the other way to let the wheels turn.<br />
This time the axle remains still <strong>and</strong> the wheels turn on the axle. The<br />
axle is fastened to a wooden body with cable clips. Cable clips<br />
fasten telephone cables to walls. Can you see the blown up version<br />
of acable clip? The clips may hold the axle tightly, so the wheels<br />
must be free to rotate.<br />
How the cable clips can hold an<br />
axle.<br />
62 Energy <strong>and</strong> Change<br />
A clip to hold telephone cables to<br />
the wall.
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