Measurement of Time and Motion — Science STD 7 — Question

When strong/high speed wind blows, an umbrella held upright at times gets upturned. Explain the reason.

By inserting the steel bar inside the solenoid and switching on electric current.

Fill in the Blank. The thermometer used to measure human body temperature is called _______ thermometer.

Give the word equation of the process of respiration.

What kind of roots is called tubers?

State whether the following statements are true or false. In case a statement is false, write the corrected statement in your notebook. Formation of manure from leaves is a physical change. (True/ False)

Predict the following change can be reversed or not be reversed. If you are not sure, you may write that down. Why are you not sure about these?
Stitching cloth to a shirt

Is there any role of liver in digestion of fats? Explain.

What is humidity? What is the instrument used to measure it?

Why shearing of wool done only in summer?