SSLC (English Medium) कक्षा ८ - Tamil Nadu Board of Secondary Education Question Bank Solutions

A body will sink if the weight of the body is greater than the buoyant force.

Complete the analogy.

Downward force: Weight:: Upward force offered by liquid: _____

Consider the statement given below and choose the correct option.

Assertion: Water strider slides easily on the surface of the water.

Reason: Water strider experiences less buoyant force.

What is reflection? Write a short note on regular and irregular reflection.

A thermostat is a device which maintains _____.

If you apply heat energy, the temperature of a system will _____.

If the temperature of a liquid in a container is decreased, then the interatomic distance will ______.

The dimensions of a substance are increased if the temperature of the substance is decreased.

Consider the statement given below and choose the correct option.

Assertion: A system can be converted from one state to another state.

Reason: It takes place when the temperature of the system is constant.

Numerical Problems.

An iron ball requires 1000 J of heat to raise its temperature by 20°C. Calculate the heat capacity of the ball.

Match the following.

Give a reason for the following.

When a comb is rubbed with dry hair it attracts small bits of paper.

How charges are produced by friction?

The pictorial symbol for water given by the alchemists was

Symbol of mercury is

The symbol of tungsten is _______.

Write the constituent elements and their symbols for the following compounds.

1. Carbon monoxide
2. Washing soda

Write the symbols for the following elements.

1. Oxygen
2. Gold
3. Calcium
4. Cadmium
5. Iron

What does a chemical symbol represent?

Define Alchemy.