Which among the following materials would you identify as soft materials and why? Ice, rubber band, leaf, eraser, pencil, pearl, a piece of wooden board, cooked rice, pulses and fresh chapati.
Rubber band, leaf, eraser, cooked rice and fresh chapati are soft materials because they can be stretched or compressed easily.
Related Articles A pencil eraser loses tiny pieces of rubber each time you use it. Why does this happen?
Consider the following materials:Copper, Sulphur, Phosphorus, Carbon (such as: pencil lead), Gold, Silver: Which of these materials are: Malleable and ductile; and brittle.
Take a rubber band. Put it around the longer side of a pencil box. Insert two pencils between the box and the stretched rubber. Now, pluck the rubber band somewhere in the middle. Do you hear any sound? Does the band vibrate?"\n
Through which of the following materials can sound travel? wood, air, water, steam, ice, hydrogen, steel, diamond.
You are provided with the following materialsmagnifying glassmirrorstainless steel plateglass tumbler.Which of the above materials will you identify as transparent?(a) (i) and (ii)(b) (i) and (iii)(c) (i) and (iv)(d) (iii) and (iv)
Differentiate among opaque, translucent and transparent materials, giving one example of each.
Which of the following materials is not lustrous?GoldSilverWoodDiamond
A sharp point of a pencil shine while an eraser does not. why?
Out of xylem and phloem, which one carries materials :(a) upwards as well as downwards ? (b) only upwards?
Why sorting of materials is important?
Out of the following materials:cotton, nylon, terylene, wool, Pet, acrylic(a) which materials are polyesters?(b) which materials is a polyamide?(c) which material is used as a substitute for wool?(d) which material is used as a substitute for glass?
Which of the following statements is not true?(a) Materials are grouped for convenience.(b) Materials are grouped to study their properties.(c) Materials are grouped for fun.(d) Materials are grouped according to their uses.
Why we sort materials into groups?
Wires cannot be drawn from materials such as stone or wood. Why?
Materials
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