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Figures P and Q represent the movement of two types of joints in our body.

Select the correct statement regarding them.

AMovement of bones having joint P can be compared to the movement of a joystick on computer.
BBones having Q joint can show movement in only one plane.
CJoint P is present in our elbows and knees.
DJoint Q is present between our backbone and skull.

In many experiments, studying photosynthesis in plants, the plant is first destarched. Which of the following describes a correct method of destarching?

A Keeping the plant in a dark place for sometime
B Bleaching the chlorophyll in leaves
C Removing all leaves of the plant
D Soaking all the leaves of plant in copper sulphate solution for an hour

Abhay is trying to find out which soil makes carrots grow best. He uses a ruler to compare the carrots. What is Abhay measuring?

(A) Their length

(B) Their colour

(C) Their weight

Rohan categorised simple machines used at his home into two groups as shown here. Which of the following can be categorised in group 1 and 2 respectively?


AStapler, Wheelbarrow
BCrowbar, Broom
CBadminton racquet,Bottle opener
DNutcracker, Shovel

A block of wood is floating on water at 0°C, with a certain volume V above water level. The temperature of water is slowly raised from 0°C. How will the volume V change with rise of temperature?

AV will not change.
BV will always increase.
CV will decrease till 4°C and then increase.
DV will increase till 4°C and then decrease.

Read the given statements and select the correct option.
Statement 1 : Clothes made from natural fibres are stronger than the clothes made from synthetic fibres.
Statement 2 : Nylon, rayon and silk are common synthetic fibres.

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

Read the given statements and select the correct option.
Statement (i) : A gold leaf electroscope is used to measure the charge on a body.
Statement (ii) : It works on the principle that like charges repel each other.

A(i) only
B(i) and (ii)
C(ii) only
DNone of the above

_______ is a useful means of communication for the armymen working in remote, under-developed areas and ________ can be used for communicating some information to hearing impaired persons.

ANewspaper, Cell phone
BWireless communication, Television
CNewspaper, Radio
DBoth B and C

Which of the following ray diagrams shown below represents the image formed by the convex lens when the object is placed beyond 2F?

A
B
C
D

Identify the given microorganism and select the incorrect statement regarding it.


A It is a saprophyte commonly called as black bread mould.
B It reproduces by means of spores.
C It results in the spoilage of food materials.
D It is a parasitic fungus that causes various diseases in plants, animals and humans.