SSLC (English Medium) Class 7 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

The SI unit of density is ______.

Density of water is 100 kg/m³

Density is defined as the mass of the substance contained in unit volume.

The lightness or heaviness of a body is due to volume.

Assertion (A): It is easier to swim in seawater than in river water.
Reason (R): The density of seawater is more than that of river water

Which one of the following has more volume. Iron block or a wooden block of the same mass.

Which one of the following has more density. 

When the velocity of a body increases with time, its acceleration is ______.

The acceleration of a body moving with uniform velocity is ______.

Give one example of uniform acceleration.

Give one example for non-uniform acceleration.

Give an example for retardation or declaration.

Define the following:

positive acceleration

Define the following:

negative acceleration.

The name copper was taken from ______.

The first letter of a symbol is always written as a ______ letter and the second letter as a ______ letter.

How many elements are known at present?

What is the expansion of IUPAC.

Rabies can be caused by the bite of monkeys.

Bum injuries can be fatal.