English Medium Class 9 - CBSE Question Bank Solutions for Science

When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface.

1. What could particles X be ?
2. What do you think liquid Y is ?
3. What is the zig-zag movement of X known as ?
4. What is causing the zig-zag movement of particles X ?
5. Name the scientist who discovered this phenomenon.
6. What does this experiment tell us about the nature of liquid Y?

When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface.

1. What could particles X be ?
2. What do you think liquid Y is ?
3. What is the zig-zag movement of X known as ?
4. What is causing the zig-zag movement of particles X ?
5. Name the scientist who discovered this phenomenon.
6. What does this experiment tell us about the nature of liquid Y?

What is the importance of tissues?

Why do plants and animals possess different types of tissues?

Tabulate differences between plants and animal tissues.

Write down names of different types of plant tissues.

During respiration, glucose and oxygen enter our body cells and waste products carbon dioxide and water leave the body cells by the process of :

During respiration, glucose and oxygen enter our body cells and waste products carbon dioxide and water leave the body cells by the process of :

In Which Tissue is Found Anyone of the Following Structures : Neuron, Dendrite, Cilia, Collagen Fibres, Elastin Fibre.

What are the different tissues in animals.

Which of the following is a mixture ?

Salt, Air, Water, Alum, Sugar

Which of the following is a mixture ?

Salt, Air, Water, Alum, Sugar

Name a metal which is soft and a non-metal which is hard.

Name a metal which is soft and a non-metal which is hard.

Name a non-metal which is a good conductor of electricity.

Name a non-metal which is a good conductor of electricity.

Name a non-metal which is a good conductor of electricity.

Name a non-metal which is a good conductor of electricity.

Name a liquid which can be classified as a pure substance and conducts electricity.

Name a liquid which can be classified as a pure substance and conducts electricity.