Earth, Moon, and the Sun — Science STD 7 — Question

During rusting, which new substance is formed?

Name the food factories of plants.

Name the source from which litmus solution is obtained. What is the use of this solution?

Pick the odd-one-out from each of the groups given below on the basis of respiratory organs. Give reason for your answer. Lizard, cow, earthworm, snake.

A unique feature in leaves allows them to prepare the food while other parts of plants cannot. Write the possible reason for this.

Which part of the digestive canal is involved in: formation of faeces ____.

What is the percentage of exhaled carbon dioxide during the breathing mechanism?

Name the cell formed as product of fertilization.

Can we use an electromagnet separating plastic bags from a garbage heap? Explain.