The full form of WWTP is:

Boojho visited a forest near his own with his classmates and his teacher. As they were entering the forest, their class teacher told them not to make noise in the forest as noise could disturb the:

Which of the following organism can respire anaerobically?

Heat from sun reaches us by :

The amount of heat produced is a work depends on:

Which effect of current is used in an electric bulb?

Who discovered magnetic effect of current?

Which is the quality of water waste?

The process of seeping of water into the groundis called:

World Water Day is celebrated on:

The atmospheric pressure is measured by:

The winds from oceans which carry water and bring rain are called:

Which method is used to prevent rusting?

In which horizon of soil, more amount of minerals are found?

There are following types of soil on the basis of size of particle

In addition to the rock particles, the soil contains

Image formed by a plane mirror is always:

Which one is not the part of the weather report?

Silk fibre is obtained from

Which of the following is not a breed of sheep?

Which of the following does not yield wool?

Raw mango is sour in taste due to presence of

Neutralisation is a reaction between

Read carefully the terms given below. Which of the following set is the correct combination of organs that do not carry out any digestive functions?

The Bile juice is stored in :

Animals are not:

Which of the following is not an effect of acute scarcity of water on plants?

The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene per person per day is a minimum of

Renewable resources need to be conserved because

Which of the following does not show water shortage?

David is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1m towards the mirror, then the distance between David and his image will be

The groundwater when collects between the layers of hard rocks is called

Which of the following does not deplete the water table at a place?

Water which falls from the clouds as rain or snow is called

'Every Drop Counts' is a slogan related to

A battery is a combination of

If the number of turns in the coil of an electromagnet is more, the strength of the electromagnet will be

Paheli and Boojho measured their body temperature. Paheli found her to be 98.6°F and Boojho recorded 37⁰C. Which of the following statements is true?

Heat always flows

The mode of vegetative reproduction where scion and stock are used is called

Which of the following statements is/are true for sexual reproduction in plants?
(i) Plants are obtained from seeds
(ii) Two plants are always essential
(iii) Fertilisation can occur only after pollination
(iv) Only insects are agents of pollination
Choose from the options given below.

The ovaries of different flowers may contain

Which of the following parts of a plant take part in sexual reproduction?
(i) Flower
(ii) Seed
(iii) Fruit
(iv) Branch
Choose the correct answer from below.

Which of these methods should not be used for disposal of urine and faeces if no sewage system is available?

Which of these is a part of the wastewater treatment plant?

An image formed by a lens is erect. Such an image could be formed by

Which of the following can be used to form a real image?

An erect and enlarged image can be formed by

A rainbow can be seen in the sky

You are provided with a concave mirror, a convex mirror, a concave lens and a convex lens To obtain an enlarged image of an object, you can use either 

A virtual image

A wooden spoon is dipped in a cup of icecream, then its other end

An iron ball at 40°C is dropped in a mug containing water at 40°C. The heat will

Which of the following organisms produce biogas from sludge in the digester tank of a wastewater treatment plant?

Figure shows an oscillating pendulum.

Time taken by the bob to move from A to C is t₁ and from C to 0 is t₂. The time period of this simple pendulum is

If we denote speed by S, distance by D and time by T, the relationship between these quantities is

On which axis is dependent variable represented?

How will you convert the speed given in km/h to m/s?

Which of the following would you prefer to use while reading small letters found in a dictionary?

Which of the following always diverge light rays?

Yeasts are used in

The raw material for cellular respiration is

Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process?

A spore-producing plant is

Forests are not responsible for

The first link in all food chains are

The general process that takes place at a sheep shearing shed is

Selective breeding is a process of

Which of the following are called producers?

Plants do not depend on animals for

Paheli's mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a

Iron pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts is responsible for its long stability?

A man painted his main gate made up of iron, to

Which of the following is a physical change?

Thunderstorm develops very frequently in areas having

Which precaution among the following is not a correct precaution to protect from lightning during a thunderstorm?

Four schematic diagrams are shown below to depict the direction of sea breez. Which of them gives the correct direction? 

The lower chambers of heart is called

In which of the following parts of human body are sweat glands absent?

A certain type of cells helps in destruction of disease-causing microorganisms are known as

They are pipe-like consisting of a group of specialised cells. They transport substances and form a two-way traffic in plants. Which of the following terms qualifies for the features mentioned above?

During heavy exercise, we get cramps in the legs due to the accumulation of

The plants that grow on the surface of earth are called

During hot summer days the air above the soil

Which of the following relations is correct?

In the process of photosynthesis, plants

Read the following statements with reference to the villi of small intestine.
(i) They have very thin walls.
(ii) They have a network of thin and small blood vessels close to the surface.
(iii) They have small pores through which food can easily pass.
(iv) They are finger-like projections. Identify those statements which- enable the villi to absorb digested food.

Hydrochloric acid is secreted by

If iodine is dropped on the boiled leaf it gives blue-black colour due to the presence of

The symbiotic association is seen in which of the following?

Which of the following statements is/are correct?
(i) All green plants can prepare their own food.
(ii) Most animals are autotrophs.
(iii) Carbon dioxide is not required for photosynthesis.
(iv) Oxygen is liberated during photosynthesis.
Choose the correct answer from the options below:

In the process of photosynthesis, which of the following energy conversions occur?

The climate at higher altitude like at Himalaya is

Which of the following statements is incorrect for penguins?

Paheli went to a wildlife sanctuary, where she saw dense vegetation of trees, shrubs, herbs and also a variety of animals like monkeys, birds, elephants, snakes, frogs, etc. The most likely location of this sanctuary is in the

Which of the following sets of substances contains acids?

Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions respectively are

The correct way of making a solution of acid in water is to

In plants, water is transported through

Which option best describes a tropical region?