Question 1 :
Two objects repel each other. This repulsion could be due to
Question 2 :
During dry weather, clothes made of synthetic fibre often stick to the skin. Which type of force is responsible for this phenomenon?
Question 3 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d06bf59b460d7261f2e8.PNG' />
In the above image, A brick is kept in three different ways on a table as shown in figure.The pressure exerted by the brick on the table will be
Question 4 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d06ef59b460d7261f2ec.PNG' />
In the above image, a car is shown sticking to an electromagnet. Out of all the forces acting on the car which one of them is larger?
Question 6 :
State True or False. Resources which are present in unlimited quantity in nature are called exhaustible natural resources.
Question 7 :
State True or False. Coal and petroleum are formed from the dead remains of organisms and are known as fossil fuels.
Question 8 :
Process of separation of different constituents from petroleum is called ___________
Question 9 :
State True or False .Excessive burning of fossil fuels is a major cause of air pollution .
Question 10 :
To protect our flora and fauna and their habitats, protected areas called _______?
Question 11 :
If cutting of trees continues,rainfall and the fertility of the soil will decrease.TRUE or FALSE
Question 12 :
Gases like methane, nitrous oxide contribute towards rising temperature of earth's atmosphere. What are they called?
Question 13 :
Once the algae in water die, they serve as a food for decomposers like -
Question 16 :
World Wide Fund for Nature (WWF) found that Ganga is one of the ten most _____ rivers in the world.
Question 17 :
Mother gives birth to a baby but the baby has characters of both parents. How is this possible?
Question 19 :
Name the soft metals which can be cut with a knife.
Question 21 :
The property of metals by virtue of which they can be drawn into wires is called ductility. True or False
Question 24 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d073f59b460d7261f2f3.jpg' />
Boojho planned an activity to observe an object A through pipes as shown in the above figure, so that he could see objects which he could not directly see. What must be the angle with respect to the incident light at which he should place the mirrors?
Question 25 :
The angle between the normal and incident ray is called the ___________ ?
Question 26 :
An image formed by a mirror the left of the object appears on the right and the right appears on the left. This is known as _______________ ?
Question 27 :
After striking the mirror, the ray of light is reflected in another direction The ray that comes back from the surface after reflection is known as the ___________ ?
Question 28 :
When angle of incidence is equal to the angle of reflection
Question 30 :
The incident ray, the normal at the point of incidence and the reflected ray all lie in the same plane. This law is known as ____________ ?
Question 31 :
Suppose you are in a dark room. Can you see objects OUTSIDE the room?
Question 33 :
How many images of a candle will be formed if it is placed between two parallel plane mirrors separated by 40 cm?
Question 34 :
What is the term used for chemical secretions of endocrine glands responsible for changes taking place in the body?
Question 35 :
X and Y chromosomes are known as sex chromosomes. TRUE or FALSE?
Question 39 :
The outermost layer of the earth is not in one piece. It is fragmented. Each fragment is called :
Question 40 :
State true or false. The process of electric discharge cannot occur between clouds and the earth.
Question 42 :
What precautions should be taken if you are outside the house during a earthquake?
Question 44 :
A celestial body that revolves around a planet is known as __________.
Question 45 :
From space, the Earth appears ____ due to the reflection of light from water and landmass on its surface.
