One of the following food is not obtained from animals. The food is

Given below are the steps to test the presence of proteins in a food item:
(i) Take a small quantity of the food item in a test tube, add 10 drops of water to it and shake it.
(ii) Make a paste or powder of food to be tested.
(iii) Add 10drops of caustic soda solution to the test tube and shake well.
(iv) Add 2 drops of copper sulphate solution to it.
Which of the following is the correct sequence of the steps?

This is made up of a number of fibres twisted together:

Which of the following does not belong to the group?

The process followed to separate grains form the stalks is called

When a chocolate melts, it is:

A plant with verigated leaves is_______.

Muscles are attached to the bones by_____________

Global warming increases the concentration of ___________ in the atmosphere

Find the odd one out:

Light travels in a

A complete electric circuit is called______________ electric circuit.

Lodestone is used for

Which is not a part of water cycle?

Which of the following components of air is present in the largest amount in the atmosphere?

Which of the following is a non-biodegradable waste?

Pulses are rich sources of proteins, usually cooked. Is there a way to consume pulses raw?

Fat rich foods are harmful for us if we eat them too much. What do you think?

Write the type of soil which is best for the cultivation of cotton crop?

Write two names of liquid which are insoluble in water.

What is a saturated solution?

Classify into reversible/irreversible changes.
(a) Growth of plant.
(b) Falling of rain

Name the male reproductive part of flower.

What do you mean by endoskeleton?

(a) What type of adaptation is found in a deer, that helps it to see in all the directions?
(b) How does exchange of gases take place in an earthworm

How do people know how far they have travelled?

What do you understand by incandescent body?

Due to Sudden power failure in Ravi's house, he lighted three candles. He placed one of them in the drawing room, second in the kitchen for his mother and third one in his grandmother's room as she was ailing and bed-ridden.
(i) What is the importance of light in one's life?
(ii) What is the chemical transformation in a candle?
(iii) What values are exhibited by Ravi?

Does the magnet with iron filings sticking to it look like a bar magnet?

Oceans are the biggest sources of water, yet they are not fit for human consumption. Why?

Why do you think mountaineers carry oxygen cylinders with them, while climbing high mountains?

What is paper mash?

A and B are two plants. Plant A produces flowers which are eaten as vegetable and its fruit is nutritious, so eaten raw as a fruit. Plant B produces seed which is a source of oil and its leaves are used as vegetable. Name the plants A and B and their edible parts.

While using iodine in the laboratory, some drops of iodine fell on Paheli's socks and some fell on her teacher's saree. The drops of iodine on the saree turned blue-black while their colour did not change on the socks. What can be the possible reason?

Name two items that are made from coconut fibre.

Given below are the names of some objects and materials:
Water, basket ball, orange, sugar, globe, apple and earthen pitcher. Group them as
(a) round shaped and other shapes.
(b) eatables and non-eatables.

How is common salt obtained from sea water?

A bag of cement lying in the open gets wet due to rain during the night. The next day, the sun. shines brightly. Do you think the changes which have occurred in the cement, could be reversed?

Taking an example of plant, explain that stems are modified for making food in some plants.

We need two muscles together to move a bone.Why?

Which of the non-living things listed below, were once part of a living thing?
Butter, leather, soil, wool, electric bulb, cooking oil, apple, rubber

Give two examples of each of the following mode of transport used by humans- (a) Land, (b) Water, (c) Air

A torch is placed at two different positions A and B one by one as shown in figure.The shape of the shadow obtained in two positions is shown in the given figure.
Match the position of the torch and shape of the shadow of the ball.

What type of cells are used in calculators? What are the main advantages of using such type of cells?

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.

What do we notice on leaves or metal surfaces like iron grills and gates on a cold morning?

Observe the given figure carefully and answer the following questions:

(a) What is covering the nose and mouth of the policeman?
(b) Why is he putting a cover on his nose?
(c) Can you comment on air quality of the place as shown in the figure?

(a) What do you do with the left over food at home?
(b) If you and your friends are given the choice of eating in a plastic plate or a banana leaf platter at a party, which one would you prefer and why?

Ashu is visiting a slum area as a part of his homework assignment. He reaches the place and observe that people are very poor and their living conditions are bad. He asks questions to residents and realises that due to drought there is no food available to them and that people are hungry and children are under nourished. Ashu promises them that he will try to help and next day bring food and other amenities along with his freinds.
(a) Do you think food is responsible for some of consequences faced by villagers?
(b) Why do all living organisms require food?
(c) Name the condition which arises due to lack of food or undernourishment.
(d) What values can you observe in Ashu?

Radha came back from school hungry and went to her mother in kitchen. Radha's mother was peeling vegetables. She noted that the peels were very thick and her mother then started washing vegetables. Radha asked her to stop washing the vegetables. Her mother was surprised and asked why? Radha told her all she knew about how nutrients are washed away if we peel and then wash them?
(a) If thick peels are removed from vegetables, what happens?
(b) Washing of vegetables after peeling is not a good practice. Can you tell why?
(c) What are those components that get washed away?
(d) Give two examples of vitamins and minerals containing food.
(e) Do you think Radha has any values? Name them.

A cotton shirt, before it reaches you, completes a long journey. Elaborate this journey starting from cotton bolls.

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.

Paheli was feeling thirsty but there was only a pot of water at home which was muddy and unfit for drinking. How do you think Paheli would have made this water fit for drinking if the following materials were available to her?
Alum, tub, muslin cloth, gas stove, thread, pan and lid.

It was Paheli's birthday, her brother Simba was helping her to decorate the house for the birthday party and their parents were also busy making other arrangements. Following were the activities going on at Paheli's home:
(a) Simba blew balloons and put them on the wall.
(b) Some of the balloons got burst.
(c) Paheli cut colourful strips of paper and put them on the wall with the help of tape.
(d) She also made some flowers by origami (paper folding) to decorate the house.
(e) Her father made dough balls.
(f) Mother rolled the dough balls to make puries.
(g) Mother heated oil in a pan.
(h) Father fried the puries in hot oil.
Identify the activities at Paheli's home, as those that can be reversed and those, which cannot be reversed.

What are the characteristics of plants?

Describe the skeleton of a cockroach.

Where is Cactus mostly found? How is it adapted to survive in such a habitat?

It is not accurate to measure a length with elastic tapes. Explain why.

A sheet of plywood, a piece of muslin cloth and that of a transparent glass, all of the same size and shape were placed at A one by one in the arrangement shown in figure. Will the shadow be formed in each case? If yes, then how will the shadow on the screen be different in each case? Give reasons for your answer.

With the help of a labelled diagram, explain the structure and function of a torch?

Three identical 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.

State different uses of water

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

  Rahul's friend has his birthday tomorrow. Since, he was busy so he could not buy a present for him. He looked around and found papers not in usable condition.
He used them and prepared a card, a diary of colourful pages and a photo frame as gifts for hit friend.
All his friends when saw them were surprised and so was his friend. All of them asked Rahullots of question about his gifts.
(a) Papers are which type of waste?
(b) What is the name of the process used by Rahul'
(c) List a few benefits of this process.
(d) Can all types of paper be treated by this method?
(e) What values do you observe in Rahul?