SSLC (English Medium) Class 9 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

State whether true or false. If false, correct the statement.

ISS is a proof for international cooperation- 

Discuss the benefits of ISS.

______ is essential to perform separation by solvent extraction method.

State whether true or false. If false, correct the statement.

Alloys bear the characteristics of both metals and nonmetals.

Why are one-time use and throwaway plastics harmful?

Higher Order Thinking Skill.

Explain how dioxins are formed? Which plastic type they are linked to and why they are harmful to humans?

Higher Order Thinking Skill.

Yugaa wants to buy a plastic water bottle. She goes to the shop and sees four different kinds of plastic bottles with resin codes 1, 3, 5 and 7. Which one should she buy? Why?

Which of the following does not contain natural dyes?

Indigo is a ______ dye.

Explain the types of dyes based on their method of application.

Ctenidia are respiratory organs in ______.

State whether true or false. If false, correct the statement.

Bipinnaria is the larva of Mollusca.

List the respiratory organs of amphibians.

Smooth muscles occur in ______.

Mention the most abundant muscular tissue found in our body.State its function.

Dehydration is based on the principle of removal of ______.

The organ affected by jaundice is ______.

Which one of the following is an Italian species of honey bee?

Drones in the honey bee colony are formed from ______.

Which Indian variety of honey bee is commonly used for apiculture?