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Identify the correct statements among the following.
(i) A piece of wood is lighter than water.
(ii) Cotton will float on water if placed on wax paper.
(iii) An equal volume of aluminium will be heavier than iron.
(iv) An iron nail will sink in water.

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

Read the given statements and select the option that correctly identifies true (T) and false (F) ones.
1. People who do more physical work need more carbohydrate-rich food.
2. Minerals help in the formation of bones, teeth and blood.
3. Eating too much of roughage containing food can make you obese.

There was a large number of dead fish drifting towards shore. Many dead birds with sticky, black coating feathers could also be seen there. A/An ______ might have occurred nearby.

A Tsunami
B Volcanic eruption
C Oil spill
D Earthquake

Natasha arranged four set-ups as given below:

III. Solutions in test tubes 1 and 3, turn red with methyl orange.
IV. With phenolphthalein indicator, solutions turn pink in test tubes 2 and 4.
V. Turmeric solution shows red colour with solutions in test tubes 1 and 3 while yellow colour with solutions in test tubes 2 and 4.

A II, III and IV only
B I, III and V only
C I and V only
D II, III and V only

A pendulum swings backwards and forwards passing through Y, middle point of the oscillation.

The first time the pendulum passes through Y, a stopwatch is started.
The twenty-first time the pendulum pass through Y, the stopwatch is stopped. The reading is T.
What is the time period of the pendulum?

A T/40
B T/21
C T/20
D T/10

Which point on the given graph shows the boiling point of a given substance?


A Q
B R
C S
D T

Which among the given plants does NOT produce oil?

A
B
C
D

The leaves of the lily has a layer of wax on them to prevent water from collecting on them and cause it to drown. How then do they get the gases they need for breathing?

A They get the gases they need from the water they float on
B They breathe through the flowers they produce
C They do not need any gas to live
D They can move their leaves above the water regularly for gaseous exchange.

Choose the incorrect statement(s).
(i) Water helps to regulate body temperature.
(ii) Roughage can be replaced with fats for better digestion.
(iii) A balanced diet includes all nutrients in proper amounts.
(iv) Vitamins increases the immunity of our body.

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

Which graph shows the effect of temperature on the rate of photosynthesis of the aquatic plants such as Elodea?

A
B
C
D