P-1 Heat — Science STD 10 — Question

Fill in the following blanks:
Plant roots grow downward in response to _________.

The electric bulb consists of a filament made up of ………… .

Fill in the following blanks with suitable words:
Magnesium liberates ________ gas on reacting with hot boiling water.

Complete the following sentences:
Short-sighted person cannot see _____ objects clearly. Short-sightedness can be corrected by using _____ lenses.

Process of glycolysis was discovered by__________.

Fill in the following blanks with suitable words:
The form of carbon which is used as a lubricant at high temperature is __________.

Evolution means…………… (Gradual development, gene)

Fill in the following blanks with suitable words:
_________ in the lungs provide a very large surface area for gaseous exchange.

Fill in the blanks in the following sentences:
Those substances whose smell (or odour) changes in acidic or basic solutions are called

............. is arranged on disaster of fire in various schools by the fire fighters.