SSLC (English Medium) इयत्ता ९ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

Match the following.

Oxygen is very essential for us to live. It forms 21% of air by volume. Is it an element or compound?

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

Smaller the size of the orbit, lower is the energy of the orbit.

Explain the postulates of Bohr’s atomic model. 

Write any four uses of acids.

What are the uses of Plaster of Paris?

What is catenation? How does carbon form catenated compounds?

What are called Anaesthetics? How are they classified?

The tissue composed of living thin walled polyhedral cell is ______.

The fibres consists of ______.

Aerenchyma is found in ______.

Parenchyma, collenchyma, Sclerenchyma are______ type of tissue.

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

Vessels are found in collenchyma.

What are intercalary meristems? How do they differ from other meristems?

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

Photosynthesis produces glucose and carbon dioxide.

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

Photosynthesis is important in releasing oxygen to keep the atmosphere in balance.

Differentiate the following.

Diphyodont and Heterodont

Differentiate the following.

Incisors and Canines

Name the types of teeth present in an adult human being. Mention the functions of each.

Increased amount of ______ in the atmosphere, results in greenhouse effect and global warming.