Electricity: Circuits and their Components — Science STD 7 — Question

Paheli wants to know whether roots, which are underground also take in oxygen. If so, how?

In a torch, we generally use more than one cell. Are those placed in any particular order?

Define the term egestion.

Name the device on vehicles to track the distance covered.

Name the part of digestive canal involved in chewing of food.

As we know that an image is formed by the actual intersection of rays and can be obtained on the screen. So, state whether it is real or virtual image.

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

What does the red ink experiment in twigs show?

How many elements are currently known?

For planting rice, which kind of soil would be most suitable?