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The electric circuit shown here was set up by Ramesh. He placed a 6 cm copper bar, X, in the electric circuit. He closed the switch and observed the brightness of the bulb. Ramesh then repeated the experiment, each time using copper bars of different lengths: 8 cm, 12 cm, 15 cm. The aim of his experiment was


ATo find out if the number of batteries affect the brightness of the bulb
BTo find out if the different positions of the copper bar in the electric circuit will affect the brightness of the bulb
CTo find out if the length of the bar affects the brightness of the bulb
DTo find out if the material of the bar affects the brightness of the bulb.

The distance-time graph of a particle is as shown here.

The corresponding speed-time graph of the particle is

A
B
C
D

Rajat observed a gibbous moon in the night sky of 15^th February. Which of the following phases of moon must have appeared on 8^th February (X) and which phase of moon will he observe on 23^rd February (Y) respectively?

A
B
C
D

Which of the following is an example of first class lever?

A Nutcracker
B Tweezer
C Scissors
D Ice tongs

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


A(A) - (i), (B) - (iii), (C) - (iv), (D) - (ii)
B(A) - (iii), (B) - (iv), (C) - (i), (D) - (ii)
C(A) - (iv), (B) - (ii), (C) - (iii), (D) - (i)
D(A) - (ii), (B) - (iii), (C) - (iv), (D) - (i)

Read the given statements and select the correct option.
Statement 1 : Forests are known as "green lungs".
Statement 2 : Plants absorb CO₂ from the atmosphere and release O₂, which purify the air. This helps to maintain the balance between O₂ and CO₂ in the atmosphere.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true and statement 2 is false.
D Both statements 1 and 2 are false.

Match the labelled parts (i), (ii), (iii) and (iv) in the given figure with their functions a - e.

a. Allows selected substances to enter or leave the cell.
b. Produces energy for the cell
c. Protein synthesis
d. Responsible for storage and secretion of substances from the cell.
e. Cellular digestion

A i - d, ii - e, iii - c, iv - a
B i - a, ii - b, iii - d, iv - c
C i - c, ii - a, iii - e, iv - d
D i - b, ii - d, iii - e, iv - a

Read the given paragraph.
X is a process accomplished by air that helps in increasing number of plants and their widespread distribution whereas Y is a process aided by air that helps in food formation by autotrophs for its continuous supply to all living organisms. Identify X and Y and select the correct option.

A X could be the process of transfer of pollen grains from anther of flower of one plant to stigma of flower of another plant.
B Seeds subjected to X have hairy or winged structures and are light weighted.
C Y is performed by all green plants and cyanobacteria and is the only process on Earth that adds oxygen to air.
D All of these

The properties below describe which of the following fabrics?

• Cool to wear

• Absorbs water easily

• Soft to touch

• Creases easily

• Can be washed and ironed easily

(A) Cotton

(B) Silk

(C) Wool

Read the given statements and select the correct option.
Statement 1 : Moon is a very silent place.
Statement 2 : Air is present on the Moon.

ABoth statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1.
CStatement 1 is correct but statement 2 is incorrect.
DBoth statements 1 and 2 are incorrect.