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## Class 9 term 2 science practice test papers

Given below are the practice test papers for class 9 science term two exams. you can download and practice them. If you like them do tell us in the comment section below the post

Central Board of Secondary Education, Delhi has been conducting CBSE group Mathematics Olympiad for students studying in its affiliated schools.

WHO CAN PARTICIPATE IN CBSE GROUP MATHEMATICAL OLYMPIAD
a) Student of class XII, XI, X or IX can participate in the competition. However, there will be a common question paper for all participants. Bright students from class VIII may also appear.
b) A school can sponsor maximum five students for the competition.

## The Age of the Universe( Big Bang)

One question has always fascinated the scientists ” When the universe began?” . Current Thinking believes that Universe began as a singularity in space and Time. The singularity is called as Big Bang. It is believed at this time everything was condensed into very small space. After that the Universe has been continuously expansion mode.

A Astronomer Edwin Hubble discovered in 1929 the rate of expansion of Universe i.e the rate at which the galaxies are receding from each other. That law is called Hubble Law. As per Law, if the two galaxies are at distance R,Their present relative velocity of separation is given by

## Energy facts

1)The word energy comes from the Greek word energeia.
2)Most types of energy are either a form of kinetic energy or potential energy.
3)Common examples include heat energy, elastic potential energy, chemical energy, sound energy, nuclear energy, geothermal energy , gravitational potential energy and electric Potential energy
4) Kinetic energy refers to the energy an object has because of its movement. A Truck in motion has kinetic energy, as does a basketball when you pass or shoot it.

## Whats is HOTS(High Order thinking skills)

In Bloom’s taxonomy there are six levels: knowledge, comprehension, application, analysis, synthesis, and evaluation. Higher order thinking skills are those skills in the top three levels: analysis, synthesis, and evaluation. These three skill levels are important in critical thinking