Exploring Substances: Acidic, Basic, and Neutral — Science STD 7 — Question

A marble tile would feel cold as compared to a wooden tile on a winter morning, because the marble tile:

Which of the following is not a forest product?

Earthworms and frogs breathe through their skin because of which the skin of both the organisms is:

Cells perform various functions like digestion, excretion, reproduction and transport. This is the reason the cells require energy to perform all these activities in organism. What is the source of the energy which is utilised by the cells?

Convex lens converges the light generally falling on it and it is called:

An astronaut in a spacecraft observes a shadow of a tool floating in front of a spotlight. The shadow appears sharp and clear. What can be inferred about the nature of light in space?

The upper two chambers of a heart are known as________.