Acids, Bases and Salts — Science STD 7 — Question

Name the organ responsible for removal of undigested and unabsorbed residues from human body.

Describe briefly about the direction of the convection current during ventilation.

Give the name of blood component which is liquid and contains 90% water.

Name the end products of carbohydrates.

State whether the following statements are True or False. If false, write the correct statement: Ocean water cannot be used for domestic purposes.

Suggest an alternative of chemical fertilizer.

Paheli thought that new plants always grow from seeds. But, she has never seen the seeds of sugarcane, potato and rose. She wants to know how these plants reproduce?

Note the changes in shape, size or state : Cutting a piece of paper

Name the region in Gujarat having very erratic rainfall.