Cloudy nights are warmer then the nights with clean sky. Explain.

Clouds, dusts and humid nights are warmer than clear dust free dry nights. Discuss the global warming.

With respect to Green House effect. Statement A: Clouds, dusts and humid nights are warmer than clear dust free day nights. Statement B: Clouds and dust particles produce green house effect.

a. The near point of a hypermetropic person is 75 cm from the eye. What is the power of the lens required to enable the person to read clearly a book held at 25 cm from the eye? b . In what way does the corrective lens help the above person? Does the lens magnify objects held near the eye ? c. The above person prefers to remove the spectacles with looking at the sky. Explain why .

At night PAR value is

Cleaning organelle in the cell-Explain.

Monica was watching the night sky. She saw a star , moving towards her, with increase in brightness. After some few minutes when she watched closely, she found it was the light from a flight in the sky. Whe was surprised, but initially the flight looked stationary, after soem time it was glowing brightly miving towards her. So she went and asked her father. Why this effect occured?

------and -----planets never appear in the mid-night sky.

One set ofa plantswas grown at 12 hrs day and 12hrs night period cycles and it flowered while in the other set, night phase was interrupted byflash of light and it did not produce flower, under which one of the following categories willyou place this plant?

Animals active at night are called ………………. .