Some Natural Phenomena — Science STD 8 — Question

Both incident ray and reflected ray lie in the same plane.

Peat is the hardest grade coal.

Tremors on the earth can also be caused by the eruption of a volcano.

State whether the following statements are true or false: Constellation Orion can be seen only with a telescope.

State whether the following statements are true or false: Copper displaces zinc from zinc sulphate solution.

Zygote is an unfertilised egg.

The nails get penetrated into the planks easily because a large force acts on a small area.

We cannot predict cyclones.

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.

Insulin is secreted by pituitary gland.