Light — Science STD 7 — Question

What is light?

Sunlight, chlorophyll, carbon dioxide, water and minerals are raw materials essential for photosynthesis. Do you know where they are available? Fill in the blanks with the appropriate raw materials. Available in the air: .

Why do sponges and hydra not have blood?

Paheli wonders which side of the heart will have oxygen-rich blood and which side will have carbon dioxide-rich blood.

Name the parts of the alimentary canal where: Taste of the food is perceived.

Insects have a special organ present to carry out respiration. What is that organ called?

What is the term used for the process of taking in air?

Solution of which non-metal is applied on wounds as an antiseptic?

Define temperature.

Why are seasons not prominent near the equator?