Maharashtra Board Class 10 Science — Flashcards for Quick Revision

A: Gravitation is the universal force of attraction between any two objects in the universe. It was discovered by Sir Isaac Newton when he observed an apple falling vertically downward from a tree and re

A: Centripetal force is the force that acts on any object moving in a circular path, directed towards the center of the circle. 'Centripetal' means center-seeking. Example: When you tie a stone to a stri

A: Kepler's First Law: The orbit of a planet is an ellipse with the Sun at one of the foci. This means planets do not move in perfect circles but in oval-shaped paths called ellipses.

A: Heredity is the transfer of biological characters from one generation to another via genes. Gregor Johann Mendel is considered the pioneer of modern genetics who studied inheritance patterns in pea pl

A: Transcription is the process of RNA synthesis using DNA as a template. It occurs in the nucleus where mRNA is produced with a complementary sequence to the DNA strand. RNA contains uracil instead of t

A: A triplet codon is a sequence of three nucleotides on mRNA that codes for a specific amino acid. Dr. Har Govind Khorana, an Indian-origin scientist, made important contributions in discovering triplet

A: Dobereiner's Law of Triads states that when elements with similar chemical properties are arranged in groups of three (triads) in increasing order of atomic mass, the atomic mass of the middle element

A: Lithium (Li), Sodium (Na), Potassium (K) form a triad. Li = 6.9, Na = 23.0, K = 39.1. Mean = (6.9 + 39.1) ÷ 2 = 46 ÷ 2 = 23.0. The calculated value matches the actual atomic mass of sodium (23.0), con

A: Newlands' Law of Octaves states that when elements are arranged in increasing order of their atomic masses, every eighth element has properties similar to those of the first element. This is similar t