Heat — Science STD 7 — Question

Why do iron articles rust faster in Mumbai than in Delhi?

State whether the following statements are True or False. If wind flows from land to the ocean, then it is day time.

Wastewater is fit for human consumption or not. Give reason to support your answer.

What is the difference between cellular respiration and internal respiration?

Fill in the blanks: In photosynthesis solar energy is absorbed by the pigment called ___________.

Name the component that connects or breaks the flow of electricity.

Boojho wants to know how these organisms acquire nutrients? They do not have mouths like animals do. They are not like green plants as they lack chlorophyll and cannot make food by photosynthesis.

Two magnetic lines of force don’t intersect each other. Explain why?

Explain cellular respiration.

Cutting of log of wood into pieces is a chemical process or physical change?