Give two examples of each.
(a) Kharif crop
(b) Rabi crop
(a) Kharif crop: The crops which are sown in the rainy season, called as kharif crops. This season is generally from June to September. For example: Paddy, maize, soyabean etc.
(b) Rabi crop: The crops which are sown in the winter season (October to March) are called Rabi crops. For example: Wheat, gram, pea, mustard etc.
Describe with the help of a diagram an instrument which can be used to detect a charged body.
Sketch larynx and explain its function in your own words.
Arrange the following boxes in proper order to make a flow chart of sugarcane crop production.
Make a labelled diagram of a candle flame.
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.
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.
Complete the crossword with the help of clues given below:
Across
1. This is necessary for photosynthesis.
3. Term for component present in the cytoplasm.
6. The living substance in the cell.
8. Units of inheritance present on the chromosomes.
Down
1. Green plastids.
2. Formed by collection of tissues.
4. It separates the contents of the cell from the surrounding medium.
5. Empty structure in the cytoplasm.
7. A group of cells.
Lightning and thunder take place in the sky at the same time and at the same distance from us. Lightning is seen earlier and thunder is heard later. Can you explain?
Identify the part which vibrates to produce sound in the following instruments:
(a) Dholak (b) Sitar (c) Flute
Why is the distance between stars expressed in light years? What do you understand by the statement that a star is eight light years away from the Earth?
Which of the following cannot be charged easily by friction?
(a) A plastic scale
(b) A copper rod
(c) An inflated balloon
(d) A woollen cloth.
Why does the increased level of nutrients in the water affect the survival of aquatic organisms?
Name three liquids, which when tested in the manner shown in Fig.14.9, may cause the magnetic needle to deflect.
Make sketches of animal and plant cells. State three differences between them.
Give two examples each of situations in which you push or pull to change the state of motion of objects.
Fill in the blanks in the following :
(a) A person 1 m in front of a plane mirror seems to be _______________ m from his image.
(b) If you touch your ____________ ear with right hand in front of a plane mirror it will be seen in the mirror that your right ear is touched with ____________
(c) The size of the pupil becomes ____________ when you see in dim light.
(d) Night birds have ____________ cones than rods in their eyes..
Draw sketches to show the relative positions of prominent stars in
(a) Ursa Major and (b) Orion