An iron nail is kept in each of the following liquids. In which case would it lose its shine and appear dull?

While doing an activity in class, the teacher asked Paheli to handover a translucent material. Which among the following materials will Paheli pick and give her teacher?

You are provided with the following materials.
(i) Magnifying glass
(ii) Mirror
(iii) Stainless steel plate
(iv) Glass tumbler
Which of the above materials will you identify as transparent?

Find the odd one out from the following.

Which of the following statements is not true?

Sand is a material which is _____________  in water.

Wood is a material which is ____________ than water.

Those materials through which we can see, are called __________ materials.

Materials which cannot be compressed are called ___________ materials.

______________ materials have an uneven or irregular surface.

Chalk dissolves in water.

Sand settles down in water.

Oiled paper is a transparent material.

Mirror is opaque.

Liquids which mix well with water are called immiscible liquids.

Name two materials which do not conduct electricity.

By which property, steel and sponge differ from each other?

On a bright sunny day, Shikha was playing hide and seek with her brother. She hid herself behind a glass door. Do you think her brother will be able to locate her? If yes, why? If no, why not?

Write two objects through which things can be seen clearly.

Name five objects which can be made from wood.

List all items known to you that float on water. Check and see if they will float on an oil or kerosene.

Why is a tumbler not made with a piece of cloth?

Give three common characteristics of materials.

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

List some materials that are used for making more than one type of an object.

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?

Rohan and his friends planned to play cricket match on sunday morning. But, by chance on saturday, Rohan got high fever. Due to high fever, his parents did not allow him to play cricket. So, Rohan was very upset. But his father suggested to him that he can see the cricket match that his friends were playing in the park through a glass window, although the window will be closed
Read the above passage and answer the following questions.
(a) How Rohan was abie to see the cricket match, although the window was closed?
(b) Write different types of materials based on their transparency.
(c) What values are shown by Rohan's father?.