Heat Transfer in Nature — Science STD 7 — Question

State whether the following statements are True or False: The coast line of India is not vulnerable to cyclones.

A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour. Write a word equation for the chemical change, if any.

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

State the cause of generation of wind.

RBC contains a red coloured pigment which carries oxygen with it. What is the pigment called?

Following statements describe the five steps in animal nutrition. Read each statement and give one word for each statement. Write the terms that describes each process. Transport of digested and soluble food from the intestine to blood vessels.

What kind of image does a pinhole camera form?

Explain how the rotation of the Earth causes day and night.

Do you think that one possibility could be using a turmeric solution for the spraying liquid and a soap solution for writing on the paper?

What does a substance turning blue litmus paper red indicate?