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

Higher-Order Thinking questions:

Why is hydrogen considered an element?

We should use a handkerchief when we sneeze, Justify.

Which one of the following scales has a lower fixed point at 0°C?

The lower fixed point on the Celsius scale is ______.

The coldest natural temperature ever recorded on earth is ______.

The hottest natural temperature ever recorded on earth is ______.

Temperature of the universe in the earliest moments after the big bang is ______.

In humans, the average internal temperature is 98.60°C.

In greek, Centium means 100 and Gradus means steps, both words make it Centigrade and later Celsius.

The temperatures in Celsius and in Fahrenheit will be same at -40.

Assertion and Reason.

Assertion(A): Heat energy is transferred from one body to another due to a temperature difference between them.

Reason (R): Heating a substance causes a rise in temperature.

Assertion and Reason.

Assertion(A): When a very hot liquid is poured into a thick glass tumbler it cracks.
Reason (R): Unequal expansion of inner and outer glass walls causes the glass to crack.

What is the freezing point of water on the Fahrenheit scale?

At what temperature the value will be the same in Celsius and in Fahrenheit?

Mention any two properties of alcohol.

The SI unit of potential difference is ______.

An electric charge always flows from a point at a ______ to a point at a ______.

Assertion (A): Charges flow from higher potential to lower potential.
Reason (R): Current flows mainly due to the flow of electrons.

Name the instrument which is used to measure the potential difference.

______ cells have the ability to multiply and develop into different types of cells.