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A boy takes 5 seconds to reach each point from A to B, B to C and C to D as shown in the diagram. If AB = BC = CD = 20 m then which of the following information is correct when the boy reaches point D from point A?

The velocity of a particle increases from u to v in a time t during which the particle has a uniform acceleration. Which of the following equations applies to the motion?

A 2s = (u + v) × t
B
C v² = u² + 2as
D s = v × t

Which of the following statements are correct?
(i) Some animals help us in keeping our environment clean. They consume dead animals and dispose them off. They are called scavengers.
(ii) Quinine, a forest product obtained from the bark of Cinchona tree, is widely used to treat typhoid.
(iii) Van Mahotsava is a festival of cutting down trees.
(iv) World Forest Day is celebrated on 21^st March every year.

A (i) and (iv) only
B (ii) and (iii) only
C (i) and (ii) only
D (iii) and (iv) only

Garima carried out a fair test to find out the speed with which water passed through four different kinds of soil. She recorded her findings in the table below.

In which type of soil would you find the mangrove trees growing in?

AP
BQ
CR
DS

The diagram shows a circuit in which all the switches are open.

Which of the following switch positions would give a resistance of 4 W between X and Y ?

In the given figure, rectangle, square, circle and triangle represents the regions of wheat, gram, maize and rice cultivation respectively.

Which area is cultivated by rice and maize only?

A9
B8
C2
D7

An electric circuit is shown here. When the switch S is opened, which of the following lamp(s) will switch off?


A1 only
B3 only
C2 and 3 only
D1, 2 and 3

Match the column I with column II and select the correct option from the codes given below.

Ms Naina, a science teacher divided the class into four groups and each group was given different mixtures :
Group I : Sand and iron filings
Group II : Oil and water
Group III : Salt and sand
Group IV : Wheat and husk
Which of the following methods should each group use to separate the components of mixtures given to them?

Read the given paragraph.
X, Y and Z are three methods of waste management. X requires action of biological agents whereas Y and Z are chemical processes. Both X and Y reduce the waste volume whereas Z makes the waste reusable.
Which of the following is incorrect regarding X, Y and Z?

AX enriches the soil with nutrients and helps in recycling of matter between living organisms and their environment.
BY generates gases and heat energy and is best suited for disposing toxic waste.
CZ increases the demand and supply of fresh raw material and causes air and water pollution.
DSaprophytes and detritivores play a major role in X.