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The given picture shows two boys trying to move a boat from the beach into the water. Identify the forces as represented with labelled arrows D, E and F?

Which of these activities will help conserving soil and check soil erosion?

(A) Constructing dams

(B) Stopping overgrazing

(C) Terrace farming

Consider the following list of materials to answer the question which follows.
I. Liquid oxygen
II. Soap solution
III. Brass
IV. Silver
V. Petrol.
Which one of the following is correct?

A I, III and IV are elements
B II, III and V are mixtures
C III and IV are elements
D III and V are compounds

Based on the given chart, desert plants most likely compete for ____.

(A) Light

(B) Water

(C) Space

X is a plant whose seeds are dispersed by wind whereas Y is a plant whose seeds are dispersed by animals. Which of the following holds true regarding plants X and Y?

AThe seeds of plant X may have either wings or hair like structures.
BThe fruits of plant Y may or may not be edible.
CThe seeds of plant X are dispersed in a small radius around parent plant whereas seeds of plant Y are dispersed to very far off places.
DBoth A and B

Dustbin containing discarded material was left uncovered for sometime. Amount of different materials and factors related to them changed during these days which were plotted in the given graph.

Select the correct option regarding this.

A Q could be tin can.
B P could be decomposer microbes and R could be fruits and vegetables peel.
C P could be organic waste whereas S could be discarded syringe.
D All of these

Starting from the first letter strike out every alternate letter to get the name of a sedimentary rock formed when large rounded clasts get cemented together in a matrix.

APQSUTAURJTKZOIWTLEM
BMORBTSUIVDWIXAYNZ
CSGQRPAMNLIGTKET
DLCYOMNEGTLUOJMGEKRIASTPEQ

The diagram shows three people taking a ride at a fair as shown here. As the boat swings back and forth, which of the following statement(s) is/are true about the three persons, X, Y, and Z ?

(i) X experiences the most potential energy when the boat swings left.
(ii) Z experiences the most potential energy when the boat swings right.
(iii) Y experiences the most potential energy as the boat passes the rest position during swinging.

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

Element X with mass number 24 has 12 neutrons while element Y with mass number 19 has 10 neutrons. What is the chemical formula of compound formed when X combines with Y?

A X₂Y
B XY₂
C X₂Y₂
D X₂Y₂

Read the given statements.
(i) Paramecium has stiff hair-like structures called ____ all over its body, which are used for ____.
(ii) Hydra has a number of ____ around its mouth, that entangle small aquatic animals and kill them with their ____cells.
(iii) Frog uses its long, sticky ____ to catch insects.
(iv) Mosquito sucks up the blood of animals with its ____.
Select the option which correctly fills the blanks in any two of these statements.

A (ii) - Cilia, Absorptive;(iii) - Hand
B (i) - Tentacles, Ingestion; (iv) - Feeding tube
C (i) - Cilia, Ingestion; (ii) - Tentacles, Stinging
D (iii) - Tongue; (iv) - Pseudopodia