SSLC (English Medium) इयत्ता ७ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

HOTS

Silk fiber is used to manufacture parachute. Why?

Assertion: Wool is the fibre derived from the fur of animals.

Reason: Animals like goat, Yak, Alpaca and rabbit yields wool.

The slope of a velocity-time graph gives ______.

If the velocity of a body does not change, then its acceleration is ______.

What are the limitations of Thomson’s model of an atom?

Match the following:

Write the types of vector Graphics files.

Name the software used to edit the Vector Graphics Images.

What is resistance?

We would have observed that the plate that covers the cooked food items has water droplets inside. Why? Explain.

Assertion (A): Burning of a candle is considered a physical as well as chemical change.
Reason (R): Melting of wax is a physical change melted wax turns into vapours and then bums which is a chemical change.

Assertion (A): No-new substance is formed when water is heated to get steam.
Reason (R): Conversion of water into steam is a physical change.

______ belong to Monera.

List two demerits of five kingdom systems of classification.

Write the merits and demerits of the five-kingdom classification.

How can you differentiate a Prokaryotic cell from a Eukaryotic cell?

The light falling on the mirror is called as ______ and the light reflected is called reflected ray.

The image formed by a plane mirror is always as far behind the mirror as far the object lies in front of it.

You can see a rainbow only when your back is towards the sun.

Plane mirrors are used as looking glass, to reflect light on objects and in periscopes.