The joint between the head and the upper jaw is an example of

• pelvic joint

• fixed joint

• ball and socket joint

• hinged joint

There are two planets in our solar system whose periods of revolution around the Sun are less than those of our Earth, but their periods of rotation are more as compared to those of the Earth. These planets are

• Mars and Jupiter

• Mercury and Saturn

• Mercury and Venus

• Uranus and Neptune

Which one of the following places in India is most likely to be affected by cyclones?

• Udaipur

• Badrinath

• Puri

• Amritsar

The air near a heat source gets hot and rises. The air from the sides comes into taking its place. This is the way in which the air gets heated by oil heaters. What is this process called?

• Convection

• Radiation

• Diffusion

• Conduction

85.

A book is lying at rest on the surface of a table. Which one of the following statements is true about the force (s) acting on it?

• There is a pair of balanced forces acting on it

• Only gravitational force is acting on it

• Only frictional force is acting on it

• There is no force acting on it

Read the given statements and select the correct option.

1. The husk is separated from heavier seeds of grain by winnowing.
2. The difference in the size of particles in a mixture is utilised to separate them by the process of sieving and filtration.

• Statement Bis true and Statement A is false

• Both Statements A and B are false

• Both Statements A and Bare true

• Statement A is true and Statement Bis false

The pressure in a fluid that is at rest

• acts only in downward direction

• acts only sideways

• acts in all directions

• acts only in vertical direction

All of the following are single-celled, except

• embryo

• paramecium

• hen's egg

• zygote

In our mouth, the arrangement of different types of teeth from front to back is

• incisor-canine-premolar-molar

• canine-incisor-molar-premolar

• canine-incisor-premolar-molar

• incisor-canine-molar-premolar

In plants and trees, water goes up high due to suction pull. Which of the following phenomena causes this suction pull?

• Transpiration

• Photosynthesis

• Respiration

• Absorption