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

______ camera is a simple device that helps us to understand the rectilinear propagation of light.

How does light travel?

On burning wool, why we get the small of burning of hair?

______ that react like the pain–suppressing chemicals released by the body.

Paracetamol interact with the receptors and reduce the intensity of pain signals to the brain.

The scouting process during the processing of wool refers to ______.

The process called ______ involves the removal of dried wool.

Questions based on Higher Order Thinking Skills:

Now answer the following questions.

1. Find the ratio of masses of spheres A and B.
2. Find the ratio of volumes of spheres A and B.
3. Find the ratio of masses of spheres A and C.

From the given v-t graph it can be inferred that an object is

The rate of change of velocity is ______.

Correct your friend who says that acceleration gives the idea of how fast the position changes.

What do you mean by constant acceleration?

A car starts from rest and it is travelling with a velocity of 20 m/s in 10 s. What is its acceleration?

A bus can accelerate with an acceleration of 1 m/s² . Find the minimum time for the bus to attain the speed of 100 km/s from 50 km /s.

Which is the example for animation?

Which technology uses pixels to create pictures?

Which software is used to create symbols?

Match the following.

What is Raster Graphics?

Differentiate between Raster and Vector images.