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

Assertion (A): Copper is used to make electric wires.

Reason (R): Copper has very low electrical resistance.

Assertion: The process of conversion of liquid water to its vapours by heating the liquid is called boiling.

Reason: The process of conversion of water vapours to liquid by cooling the vapours is called condensation.

Light that hits a mirror gets ______.

______Surface reflects the light well.

Reflection occurs , when the light

Which of the following is the best reflector of light?

The light ray gets _______ when it falls on any polished surface.

The moon ______ sun light.

Say TRUE or FALSE

We see planets because they reflect light from the sun

Say TRUE or FALSE

We see a book because it reflects the light that falls on its surface

What is reflection of light?

Differentiate between a reflection and a shadow

The galaxy containing young and hot stars is______.

True or False – If False give the correct answer

Our Milky Way galaxy is identified as an elliptical galaxy

Older stars: elliptical galaxies:: younger stars: ______.

Nearest galaxy: Andromeda:: Nearest star: ______

Number of days taken by the Mars to orbit around the Sun.

In which phase does the size of the planet Venus is small?

The galaxy which contains abundant amount of gas and dust is ______.

Name the four different types of galaxies.