You spill a bucket of soapy water on a marble floor accidently. Would it make it easier or more difficult for you to walk on the floor? Why?

Describe with the help of a diagram an instrument which can be used to detect a charged body.

What is metamorphosis? Give examples.

The following Table shows the total power shortage in India from 1991– 1997. Show the data in the form of a graph. Plot shortage percentage for the years on the Y-axis and the year on the X-axis.

Sketch larynx and explain its function in your own words.

Make a labelled diagram of a candle flame.

Arrange the following boxes in proper order to make a flow chart of sugarcane crop production.

Make sketches of animal and plant cells. State three differences between them.

What is a constellation? Name any two constellations.

Describe the construction of a kaleidoscope.

Make a sketch of the human nerve cell. What function do nerve cells perform?

The bulb does not glow in the setup shown in Fig.14.10. List the possible reasons. Explain your answer.

Write a short paragraph on the harms caused by microorganisms.

Describe the construction of a kaleidoscope.

The radius of Jupiter is 11 times the radius of the Earth. Calculate the ratio of the volumes of Jupiter and the Earth. How many Earths can Jupiter accomodate?

The following Table shows the total power shortage in India from 1991– 1997. Show the data in the form of a graph. Plot shortage percentage for the years on the Y-axis and the year on the X-axis.

Describe with the help of a diagram an instrument which can be used to detect a charged body.

The table below shows the data on likely heights of boys and girls as they grow in age. Draw graphs showing height and age for both boys and girls on the same graph paper. What conclusions can be drawn from these graphs?

Describe the ‘Green House Effect’ in your own words.

List conditions under which combustion can take place.

The process that you saw in Activity 14.7 is used for purification of copper. A thin plate of pure copper and a thick rod of impure copper are used as electrodes. Copper from impure rod is sought to be transfered to the thin copper plate. Which electrode should be attached to the positive terminal of battery and why?