Advertisements
Advertisements
प्रश्न
Tick the most appropriate answer.
Photosynthesis requires
विकल्प
heat energy
wind energy
sunlight
sound energy
Advertisements
उत्तर
sunlight.
APPEARS IN
संबंधित प्रश्न
Tick the most appropriate answer
2. Melting of ice is a
- reversible change
- irreversible change
- chemical change
- none of these
State whether the following is physical or chemical changes.
mixing oil with water —
State whether the following is physical or chemical change.
Digestion of food —
True or false
Is the process of digestion a physical change?
Tick the most appropriate answer.
Physical changes are
Give the main differences between physical changes and chemical changes.
Read the paragraph and note down the various types of changes it mentions.
It was nearing six o'clock in the evening. The sun was setting. A breeze was blowing. Leaves on the tree were shaking. Sahil was sitting in the courtyard, rolling balls of wet soil, and shaping them into various toys. Then he felt hungry and went into the house. Mother made a dough from wheat flour and fried purees. While eating hot purees, his attention was drawn outside the window. It had started raining. There was lightning, too. Sahil was enjoying his dinner in the dim light.
State which of the following 1 to 5 pertain to – A: Physical Change B: Chemical change :
- Sublimation.
- Fermentation.
- Liquefaction or condensation.
- Magnetization.
- Respiration.
Which of the following is a physical change?
Mention a few physical properties of a substance.
