Pressure exerted by a liquid is due to its:

1. weight
2. mass
3. volume
4. area

Pressure inside a liquid increases with:

1. increase in depth.
2. decrease in depth.
3. decrease in density.
4. none of the above.

The feet of lizards act like:

1. moving pads
2. drilling pads
3. suction pads
4. none of the above

Nose bleeding may occur at a high altitude because:

1. the atmospheric pressure decreases.
2. the oxygen content of atmosphere decreases.
3. the atmospheric pressure increases.
4. there are strong air currents at the high altitude.