Given figure shows some insects and a place where it collects its food.

(a) Name the insect and the place where it lives as shown in the figure.
(b) What is the food of this insect?
(c) How does it help farmers while collecting its food?
(d) Name the product we collect from this insect.
(e) Name the nutritive constituents of the insect.

Boojho was having difficulty in seeing things in dim light. The doctor tested his eyesight and prescribed a particular vitamin supplement. He also advised him to include a few food items in his diet.
(a) Which deficiency disease is he suffering from?
(b) Which food component may be lacking in his diet?
(c) Suggest some food items that he should include in his diet. (any four)

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

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

Kavita bought new silver anklets. After a month, she found that the anklets had lost their lustre and turned black. She had doubts that they were not made of pure silver. But her mother told her that they were of pure silver. She washed her silver anklets with lemon juice and found that the silver anklets had get the lustre back.
Read the above passage and answer the following questions.
(a) Do you think that the anklets are not of pure silver?
(b) Why silver anklets lost their lustre after some time?
(c) What values were shown by Kavita's mother?

Why do you think oxygen dissolved in water is important for the survival of aquatic animals and plants.

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.

Ashraf's grandmother is a diabetic patient. Her doctor advised him to control your sugar level in diet by taking less sugar and less fat content. So, she always prefer to take lassi instead of milk. Ashraf asked her mother then she explained the process of making lassi by removing cream from the curd. She told him this method is known as churning.
Read this passage and answer the following questions:
(a) Explain the process of churning.
(b) What is the purpose of this method?
(c) What values are shown by Ashraf?

Conversion of ice into water and water into ice is an example of change which can be reversed. Give four more examples where you can say that the changes can be reversed.

Sarita was interested in knowing more about plants and its parts. She started exploring and collecting plants. She wanted to preserve them, so that she can have a good collection of plants.
(a) Suggest the steps to help her in identifying plants.
(b) Is there any other method to identify plants Explain.
(c) What are the values shown by Sarita?

Gimmy went for holidays with her parents for few weeks. She kept a plant in her room and before going away she placed it near her window and water it sufficiently. After her return, she saw that plant in her room has bend towards window from where light was coming. She observed this behaviour and asked her teacher questions about it in the class .
(a) What happened to the plant?
(b) (i) Do ail living things show this characteristic?
     (ii) Give another example showing this characteristic.
(c) From this incident, what values do you think Gimmy has?

Like many animals although a car also moves it is not considered as a living organism. Give two or three reasons.

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

A student had a ball, a screen and a torch in working condition. He tried to form a shadow of the ball on the screen by placing them at different positions. Sometimes,1he shadow was not obtained. Explain.

You are provided with two identical metal bars. Out of the two, one is a magnet. Suggest two ways to identify the magnet.

Most of the water that falls on the land as rain and snow, sooner or later goes back to a sea or an ocean. Explain how it happens.

Vermicompost produced from kitchen waste is far more better than chemical fertilisers. Why?

Some waste materials can be reused in different forms. Can you make something useful with these waste materials-powder container, cold drink cans, plastic bottles, shoe boxes.

Precautions should be taken while storing cooked food items in plastic bags. Why?