SCIENCE EDUCATION

QUALITIES OF A GOOD TEST A good test should possess the following qualities. • Objectivity • Objective Basedness • Comprehensiveness • Validity • Reliability • Practicability • Comparability • Utility Objectivity   • A test is said to be objective if it is free from personal biases in interpreting its scope as well as in scoring the responses.   Objectivity means that definite item in the answers expected . If the answer expected is not definite students will interpret in different ways resulting in different answers . If more than one examiners is involved they will give their own subjective interpretation and score answers with different criteria • Objectivity of a test can be increased by using more objective type test items and the answers are scored according to model answers provided. Objective Basedness • The test should be based on pre-determined objectives. • The test setter should have definite idea about the objective behind each item. Care has to be taken in d...

Isro creates history, launches 104 satellites in one go             India scripted a new chapter in the history of space exploration on Wednesday with the successful launch of a  record 104 satellites by Isro's Polar Satellite Launch Vehicle (PSLV) in a single mission.  PSLV-C37 carrying the 104 satellites lifted off from the first launch pad at Satish Dhawan Space Centre in Sriharikota at 9.28am. It was PSLV's 39th flight .  Seventeen minutes later, the rocket started placing the satellites into orbit, one by one with a time-frame of about 11 minutes.  Out of the total 104 satellites placed in orbit, 101 satellites belonged to six foreign countries. They included 96 from the US and one each from Israel, the UAE, the Netherlands, Switzerland and Kazakhstan.