SSLC (English Medium) Class 8 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

Write a note on Greem symbols.

Which letter is never used in any element symbol?

What is the rarest natural element on the earth?

Isotopes exist because atoms of the same element can have different numbers of ______.

James Chadwick discovered the fundamental particle called proton.

Write the properties of neutrons.

Every liter of seawater contains ______ grams of dissolved salts. 

Acidity or indigestion in the stomach is due to excessive secretion of ______.

When an acid reacts with a base, a neutralization reaction takes place to give salt and water.

Which chemical is used to neutralize the acidic soil?

Give an important use of neutralization reaction in daily life.

How do treat effluents from the industries?

Crude oil is used as a sealant for waterproofing various surfaces.

Plasmodium is a parasite.

How are protozoans classified?

What are pseudopodia?

The book written by Linnaeus is titled ______.

Carolus Linnaeus published their Natural System of Classification.

Name the types of classification.

What is an artificial system of classification?