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

One Line Answer

The oxygen which is dissolved in water is used by animals for breathing and used by plants for breathing and photosynthesis.

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Chapter 4: Sorting Materials and Groups - Long Answer Questions [Page 24]

Chapter 4 Sorting Materials and Groups
Long Answer Questions | Q 23. | Page 24

Short Answer Type Question:

What is the basis for sorting materials?

Materials which can be bent or stretched easily are called ______.

Match the objects that are made of the same material.

Choose the odd one:

Name some examples for shiny materials?

What is material?

Some of the following statements are incorrect. Find the incorrect statements and correct them.

The property of metals by virtue of which they can be drawn into wires is called ductility.
Metals are good conductors of electricity but poor conductor of heat.
Articles made up of metals produce ringing sound when struck hard.
Oxides of non-metals and metals are acidic in nature.
A less reactive metal displaces a more reactive metal from its salt solution in water.

Which of the following materials is not lustrous?

Differentiate among opaque, translucent and transparent materials, giving one example of each.