GREAT TIPS

UNIT 1 ANIMALS

#Different animals have different external features. The external features of animals enable us to  recognise and differentiate them.

 

# A sea horse is actually a fish. Its head looks similar to the head of a horse. It is a unique fish because it swims in a vertical position with its head up and tail down.

 

# Usually , birds fly in the sky, but penguins found in the Antarctic ' fly' in the water. Their wings are useless on the ground, but they help the penguins swims so fast that they look like they are flying in water.

 

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UNIT 2 PLANTS

#Usually ,plants with soft stem have fibrous roots while plants with woody stem have prime roots.The roots are used to absorb water.

# Plants can also be grouped by they reproduce. Not all plants have seeds.

 # A cactus'thorns help it to reduce the loss of water.

 

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UNIT 3 MAGNETS

#Lodestones are natural magnets.

# When bar magnets are not in use,they should be kept in pairs: South pole to North pole,with an iron keeper at each end. 

 

 # Most magnetic things are made of steel and iron.

# Normally, large magnets are stronger than small magnets, but sometimes the opposite is true.

# A compass needle will naturally point towards the Earth's magnetic north pole.

 

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UNIT 4 ELECTRICITY

#A weak battery can cause a bulb to light up dimly.

 

# Most conductors are made of metallic materials like iron , steel , aluminium and lead.

 

#A switch is used to complete or incomplete a circuit.

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UNIT 5 SPRINGS

# A springs has a limit to how much you can stretch it.

 

# Springs absorb shock in a suspension system when we ride over bumps.

 

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