SSLC (English Medium) इयत्ता ९ - Tamil Nadu Board of Secondary Education Question Bank Solutions

IUCN was founded on ______ in Gland, Switzerland.

Define

Environmental Science.

What gives plastic different qualities and characteristics?

Why does a helium balloon float in air?

How does an object’s density determine whether the object will sink or float in water?

State the laws of flotation.

Assertion: To float, body must displace liquid whose weight is equal to the actual weight.

Reason: The body will experience no net downward force in that case.

If you put one ice cube in a glass of water and another in a glass of alcohol, what would you observe? Explain your observations.

State the advantages of ac over dc.

What is meant by magnification? Write its expression. What is its sign for real image and virtual image?

The fixed temperature at which matter changes state from solid to liquid is called ______.

What are the changes of state in water? Explain.

The third law of Kepler is also known as the Law of ______.

State Kepler’s laws.

The separation of denser particles from lighter particles done by rotation at high speed is called ______.

Plastics made of Polycarbonate (PC) and Acrylonitrile Butadiene Styrene (ABS) are made of resin code ______.

There are ______ plastic resin codes.

Name the three safer resin codes of plastics and describe their features.

Radiochemistry deals with ______.

What is Radio Carbon Dating?