Body Movement — Science STD 6 — Question

Direction: Read the passages given below and answer the questions that follow Passage Mohan was boiling water in a pan for making tea. His brother Ram came there and observed that during boiling of water some bubbles are formed. He told his brother Mohan that boiling of water is a chemical change as gas is evolved in this process. But Mohan argued that this is not a chemical change. What kind of change takes place after formation of tea?

Which of the following processes involves the separation of seeds from cotton bolls?

Cocoa tree is the source of natural chocolate flavour, which part of the tree is the source?

Identify the liquid-in-gas type of mixture from the following.

Indiscriminate disposal of plastic wastes can cause environmental pollution. Which of the following statements is/ are true?

Which organism have stream lined body covered with scales, a swim bladder and a flexible vertebral column attached to muscles?

In which of the following cases is heat energy released?

1. When ice melts.
2. When water freezes to ice.
3. When water vapour condenses into liquid water.
4. When water evaporate into water vapours.

Which part of the bulb is an insulator?

Two students while sitting across a table looked down onto its top surface. They notice that they could see their own and each other’s image. The table top is likely to be made of: