Which of the following has different eating habits compared with the others?

The mineral which controls the functioning of thyroid is

Which statement out of the following is incorrect?

Which of the following items is not soluble in water?

A solution which cannot dissolve more of a given substance at a given temperature is

Which one of the steps while burning a candle is not reversible?

Banana has ________ roots.

Fishes swim by

____________ are organisms which cannot prepare their food.

Find the odd one out:

Image of sun through a pinhole camera can be seen as:

A device that breaks the circuit is called

Which of the following is not a non-magnetic substance?

Circulation of water between ocean and land is known as

Air is a mixture of

Among the following items from waste, which item can be recycled?

Name three edible parts of the plant.

Blood clotting is function of which nutrients?

Which two crops were cultivated near the river Nile and were used for making fabrics?

Give an example each of a combustible solid, liquid and gas.

Write four materials that can be used for the process of filtration.

What are periodic and non-periodic changes? Give examples

Identify the kind of stem in the following plants.
(a) Money plant (b) Bean stalk (c) Gourd plants (d) Grapevines

Explain the adaptations of birds for flying in the air.

Camels live in desert habitat. How do they adapt to such harsh climate?

During rolling of a ball, which type of motion is performed?

Is the light from a far away object able to travel to our eyes through opaque objects?

Mention how many types of terminals of an electric cell are there.

Define attractive and directive properties of a magnet.

What happens if it rains heavily?

In a number of musical instruments, air plays an important role. Can you name some such instruments?

Name the part of the redworms which help them in grinding the food which they feed on.

Food habits of people living in South India are different from others. What are they?

What do various nutrients do for our body?

Classify the following fibres as natural or synthetic:

Give five examples each of objects that float and sink in water.

How will you separate a mixture of saw dust and sugar?

How the iron blade in these tools is fixed to the wooden handle?

If a plant has fibrous root, what type of venation do its leaves likely to have?

How does earthworm fix parts of its body to the ground?

How is Cactus adapted to survive in a desert ?

Give two examples of periodic motion.

In given figure, a flower made of thick coloured paper has been pasted on the transparent glass sheet. What will be the shape and colour of shadow seen on the screen?

Paheli connected two bulbs to a cell as shown in figure.

She found that filament of bulb 8 is broken. Will the bulb A glow in this circuit? Give reason.

Column I shows different positions in which one pole of a magnet is placed near that of the other. Column II indicates the resulting action between them for each situation. Fill in the blanks.

Take out a cooled bottle of water from refrigerator and keep it on a table. After sometime you notice a puddle of water around it, why?

How will you show that air is dissolved in water?

(a) Collect pieces of different kinds of paper. Find out, which of these can be recycled?
(b) With the help of a lens, look at the pieces of paper you collected for the above. Do you see any difference in the material of recycled paper and a new sheet of paper?

Rajni went to Chennai to visit her friend. She noticed that the climate was very hot and the food available was so different than at home. Coconut is used extensively and rice is included in all meals. Her friend's mother explained these differences to Rajni.
(a) What changes were observed by Rajni in regard with food habits?
(b) Food habits of all places are different. What do you understand by food habits?
(c) List one dish commonly made in South India. Identify its ingredients, and separate plant and animal derived ingredients.
(d) Do you observe any values in Rajni? Name them.

List all the sources and importance of the following minerals in food.
(a) Calcium 
(b) Magnesium
(c) Potassium
(d) Zinc
(e) Iron

How can the quality of cotton fabrics be improved?

Chalk, iron nail, wood, aluminium, candle, cotton usually look different from each other. Give some properties by which we can prove that these materials are different.

Read the story titled 'Wise Farmer' and tick the correct option to complete the story.
A farmer was sad/happy to see his healthy wheat crops ready for harvest. He harvested the crops and left it under the sun/rain to dry the stalks. To separate the seeds from the bundles of the stalk, he handpicked/threshed them.
After gathering the seed grains, he wanted to separate the stones and husk from it. His wife winnowed/ threshed them to separate the husk and later sieved/ handpicked to remove stones from it. She ground the wheat grains and sieved/filtered the flour. The wise farmer and his wife got a good price for the flour. Can you tell why?

When a candle burns, both physical and chemical changes occur. Explain.

Observe figure and attempt the questions that follow it.

(a) Label the parts (i), (ii), (iii) and (iv) in the figure.
(b) What type of venation does the leaf has?
(c) What type of venation is seen in grass leaves? 

Describe the skeleton of a cockroach.

Ravi and Ritu went on a vacation to different places. They went to Rishikesh, Himalayas, Kerala, Rajasthan. They saw many kinds of trees, plants and animals, e.g. pine trees on Himalayas and cactus in Rajasthan. All the places were so, different from each other. They clicked pictures, collected samples and showed it to their teacher asking to explain the reason behind these variations.
(a) Why is there a difference in type of plants growing in different places?
(b) What do you mean by survival place of an organism?
(c) How many types of such places that give living organism shelter, food, etc., are you aware about?
(d) Give an example of variation plants from different regions.
(e) What values do we observe in Ravi and Ritu?

Boojho was riding in his bicycle along a straight road. He classified the motion of various parts of the bicycle as (a) rectilinear motion (b) circular motion and (c) both rectilinear as well as circular motion. Can you list one part of the bicycle for each type of motion? Support your answer with reason.

Explain about solar eclipse and lunar eclipse. Also, give the ray diagrams.

Boojho has a cell and a single piece of connecting wire. Without cutting the wire in two, will he be able to make the bulb glow? Explain with the help of a circuit diagram.

Three identical iron bars are kept on a table. Two out of three bars are magnets. In one of the magnets the North-South poles are marked. How will you find out which of the other two bars is a magnet? Identify the poles of this magnet

Draw a diagram to show how sea water reaches a lake or pond?

Write a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.
(a) Oxygen (b) Nitrogen (c) Carbon dioxide

Beautiful handcrafted articles like boxes and toys are made up of paper pulp in our country. Can you explain how paper pulp which is made from paper can be used to make hard boxes and other articles?