Question

2. Read the following and prepare a tree diagram about Matter.
Matter - Its nature and composition
Matter means everything existing on the surface of the earth. Matter is basically composed of three
states. They are solid, liquid and gases. We can separate matter by various methods. One of them is
physical method. Separation by physical methods includes two ways. They are mixtures and pure
substances. Mixtures are of two types. They are homogeneous mixtures and heterogeneous mixtures.
Whereas pure substances are composed of compounds and elements. These compounds and elements
can be separated by chemical methods.​

Answer 1

Answer:

Collect a few small plastic or rubber

caps of discarded bottles and clean

them. Pour one teaspoon of lemon

juice or vinegar in one cap. Bring

your tester over this cap and let the

ends of the tester dip into lemon juice

or vinegar as shown in Fig.14.2. Take

care that the ends are not more than

1 cm apart but at the same time do

not touch each other. Does the bulb

Fig. 14.2 : Testing conduction of electricity in

lemon juice or vinegar

of the tester glow? Does lemon juice

or vinegar conduct electricity? How

would you classify lemon juice or

vinegar— a good conductor or a poor

conductor?