Particulate Nature of Matter — Science STD 8 — Question

Calendars are based on various astronomical cycles which repeat predictably.

A full moon occurs when the Moon is between the Earth and the Sun.

Mangroves can help reduce the impact of tsunamis on coastal villages.

Plastics are poor conductor of electricity.

Evaporation is a physical method used to separate salt from water.

State whether the following statements are true or false: A drinking straw works on the pressure exerted by the liquid filled in a soft drink bottle in which it is placed.

Viviparous animals give birth to young ones.

Climate change is caused by human activities like burning fossil fuels.

The law of reflection is not valid for rough surfaces.

Friction decreases with increase in the smoothness of the surface.