PART - 2 CH - 13 Our Environment — Science STD 10 — Question

Define the terms : Fossil fuels

Write down the name of different methods of asexual reproduction.

Wavelength of red colour is approximately how many times the wavelength of violet colour ?

Identify me I am a type of cell division, significant during sexual reproduction and helping to maintain constant chromosome number generation after generation in particular species.

Name the particle responsible for flow of electric current in a metallic conductor.

Mauli and Vishva are best friends and they study in 4th grade. Recently, Mauli has been facing difficulty in reading the blackboard text from the last desk / bench. Vishva wonders why Mauli avoids sitting on the last desk/bench. On observation, Vishva found that Mauli often carries junk food in her lunch. Vishva has started sharing her lunch full of green vegetables and fruits with her. Mauli is now better and has also started taking a "balanced diet".
(1) Name the eye defect Mauli is suffering from.
(2) What are two possible deformities related to her eye defect?
(3) What values do you learn from Vishva and Mauli?

Write the formula of lead sulphate.

What is a lens? OR Define a lens.

Name the reaction observed during rancidity of food.

What is called single circulation?