Question

Q.6 Very Short answer type questions. (Any 10)

(1) What is smog? How it is formed?

(2) What are comets?

(3) State the two laws of reflection of light.

(4) What is an electric charge? write its types.

(5) Write the full form of LED

(6) Define atmospheric pressure.

(7) What are gametes?

(8) Name one of the endemic species.

(9) Why should we not burn plastic?

(10) Name any Six food items obtained from animals.

(11) What do you understand by univers?

(12) What is corona?​

Answer 1

Explanation:

1. Photochemical smog is produced when sunlight reacts with nitrogen oxides and at least one volatile organic compound (VOC) in the atmosphere. Nitrogen oxides come from car exhaust, coal power plants, and factory emissions. ... When sunlight hits these chemicals, they form airborne particles and ground-level ozone—or smog.
2. Comets are icy bodies in space that release gas or dust. They are often compared to dirty snowballs, though recent research has led some scientists to call them snowy dirtballs. Comets contain dust, ice, carbon dioxide, ammonia, methane and more.
3. Laws of reflection are: (i) The incident ray, the reflected ray and the normal ray at the point of incidence, lie in the same plane. (ii) The angle of incidence is equal to the angle of reflection.
4. There are two types of electric charge: positive and negative (commonly carried by protons and electrons respectively). Like charges repel each other and unlike charges attract each other. An object with an absence of net charge is referred to as neutral.
5. Light-emitting diode

Answer 2

Answer:

1. Dirty, poisonous air that can cover a whole city .Photochemical smog is produced when sunlight reacts with nitrogen oxides and at least one volatile organic compound (VOC) in the atmosphere. Nitrogen oxides come from car exhaust, coal power plants, and factory emissions. ... When sunlight hits these chemicals, they form airborne particles and ground-level ozone—or smog.

2. an object in space that looks like a bright star with a tail and that moves around the sun

3. The incident ray, the reflected ray and the normal ray at the point of incidence, lie in the same plane. (ii) The angle of incidence is equal to the angle of reflection.

4. Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of electric charge, positive and negative

5.Light-emitting diode

6.Atmospheric pressure, also known as barometric pressure , is the pressure within the atmosphere of Earth.

7.Female gametes are called ova or egg cells, and male gametes are called sperm. Gametes are haploid cells, and each cell carries only one copy of each chromosome.

8.Asiatic Lion in Gir Forest

9.Plastic bags use fossil fuels, a nonrenewable resource, and are permanent, entering the waste stream forever. They may cause more pollution

10.The food obtained from animals include beef, pork, meat, egg, milk, and chicken. These food products are highly nutritious and rich in proteins and fats.

11.all existing matter and space considered as a whole; the cosmos. The universe is believed to be at least 10 billion light years in diameter and contains a vast number of galaxies; it has been expanding since its creation in the Big Bang about 13 billion years ago

12.Coronavirus disease (COVID-19) is an infectious disease caused by a newly discovered coronavirus.

Most people who fall sick with COVID-19 will experience mild to moderate symptoms and recover without special treatment.

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