Adolescence: A Stage of Growth and Change — Science STD 7 — Question

Why is nitrogen useful in our daily lives?

What does the filament in an incandescent lamp do when electricity passes through it?

What is the role of stomata?

Name a parasitic plant with yellow, slender and tubular type of stem.

What is the term used to describe the continuous movement of water on Earth, including evaporation, condensation, and precipitation?

Observation: Metal spoon and metal coin produce a ringing sound. On the other hand, coal and wood produce dull sounds.

Paridhi and Anusha of Grade 7 started running for their morning workout. After they completed their running, they counted their breaths per minute. Anusha was breating faster than Paridhi. Provide at least two possible explanations for why Anusha was breathing faster than Paridhi.

Note the changes in shape, size or state : Making pot from mud

In which part of the human digestive system are bacteria present in the food killed? Explain how.

How fuses are useful?