Pleas answer this

Pleas answer this Q 22. Q 23. Q 24. Q 25. Q 26. Q 27. Od to prevent growth Of micro-organisms. b) Nitrogen fixing bacteria present in the root nodUIes Of legumes. c) Agent that spreads pathogens from one place to another. Write three uses of metals and three uses of non metals. Classify the following terms into cells, tissues and organs in a tabular form. Heart, RBC, platelets, Blood, Brain, hand What control measures should be taken for storage of grains? Write three advantages of synthetic fibres over natural fibres. Make a labelled diagram of candle flame. Differentiate between external and internal fertilisation with one of each.

Dear Student,

Q.22
Three uses of metals are:
1. Metals are ductile and can be drawn into wires so copper is used for electric wires.
2. Metals are malleable and and can be drawn into sheets and are thus used in making many metal objects like metal cases.
3. Metals are good conductors of heat and so are used in cooking utensils.
The three uses of non metals are :
1. Non metals are used in making many synthetic products .
2.Chlorine is used in bleaching.
3.Wood is used for burning.
Q.23

CELLS	TISSUES	ORGANS
RBC	Blood	Heart
Platelets		Brain
		Hand

Q.24

Grains should be stored in moisture free places
They should be dried thoroughly to prevent the chances of rottening
They should be stored in tin boxes to prevent them from mice.
Storage place should be well ventilated.

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