Friday , March 29 2024

Science

NCERT 8th Class (CBSE) Science: Sound

Sound

Question: How is sound produced? Answer: Sound is produced by rapid to-and-fro movements called vibrations. Question: Distinguish between infrasonic and ultrasonic. Answer: Difference is as follows: Question: What do you mean by time period of a vibrating object? Answer: The time taken for one complete vibration or oscillation is called its time period. Question:What is …

Read More »

NCERT 8th Class (CBSE) Science: Conservation of Plants and Animals – Quiz

Animals – Habitat and Adoption

NCERT 8th Class (CBSE) Science: Conservation of Plants and Animals – Quiz 22 Multiple Choice Questions related to NCERT 8th Class (CBSE) Science: Conservation of Plants and Animals – Quiz: Ecosystem consists of all the plants, animals and microorganisms in an area, along with all the non-living components, such as climate, …

Read More »

NCERT 8th Class (CBSE) Science: Conservation of Plants and Animals

Animals – Habitat and Adoption

Question: What is biodiversity? Answer: Biodiversity is the variety of plants, animals and microorganisms generally found in an area. Question: What do you mean by flora and fauna? Answer: Flora: Species of all plants found in a particular area is known as flora of that area. Fauna: Species of all animals found in …

Read More »

NCERT 8th Class (CBSE) Science: Combustion and Flame

Flame

Question: What is combustion? Answer: The process of burning of substances in air or oxygen with the evolution of heat and light is known as combustion. Question: Distinguish between combustible and non-combustible substances, giving three examples of each. Answer:  Question: Why is it more difficult to burn some combustible substances than others? Answer: Different substances …

Read More »

NCERT 8th Class (CBSE) Science: Reaching the Age of Adolescence – Quiz

Reaching the Age of Adolescence

NCERT 8th Class (CBSE) Science: Reaching the Age of Adolescence – Quiz 19 Multiple Choice Questions related to NCERT 8th Class (CBSE) Science: Reaching the Age of Adolescence – Quiz: The endocrine system consists of a number of ductless glands that secrete hormones. The hormones control several processes in the body. …

Read More »

NCERT 8th Class (CBSE) Science: Reaching the Age of Adolescence

Reaching the Age of Adolescence

Question: What do you understand by ‘puberty’? Answer: The stage of life when the body becomes capable of reproduction is known as puberty. Question: Why is looking after physical health more important at adolescent age? Answer: Walking, jogging, aerobics, outdoor games etc, are good for the growing adolescent body. Question: Discuss the …

Read More »