Identifying the electric conductivity of a material:
Arrange an electric circuit with a battery and bulb. Close and circuit using an iron nail as shown in figure. Observe whether the bulb glows or not. Record your observations in table Repeat the same experiment using the other samplesa nd record your observation in the same table.

Turmeric paper is a natural indicator, along with turmeric indicator paper, we can also prepare other natural indicators mentioned in the table below. Carry on tests and record your observations on the given table.

Take five beakers with water. Take small quantities of sugar, salt, chalk powder, sand and sawdust. Add each material to separate beakers and stir. Observe the changes and record your observations in the given table.

Do the following actions: Bowl an imaginary ball at an imaginary wicket. Lie down and try to rotate your leg at the hip. Bend your arm at the elbow and your leg at the knee. Stretch your arms sideways chew some food bend your arm to touch you shoulder with your finger and try to move other body parts as well. Record your observations in table 1

Collect the salt samples like sodium chloride, aluminium chloride, copper sulphate, sodium acetate, ammonium chloride, sodium hydrogen carbonate and sodium carbonate. Dissolve them in distilled water. Check the action of these solutions with litmus papers. Find the pH using pH paper. Classify them into acidic, basic or neutral salts. Identify the acid and base used to form the above salts. Record your observations in table

A tester is used to check conduction of electricity through two liquids labelled A and B: It is found that the bulb of the tester glows brightly for liquid A while it glows very dimly for liquid B. What is your conclusion ?