Basics of Physics

Basics of Physics Worksheet-7

1. Burning of charcoal is a chemical reaction, which produces _____.

A. thermal (heat) energy            B. coal energy

C. solar energy                             D. cooking energy

2. How many type of electric charges are there?

A. One: positive                                     

B. Two: positive and negative

C. Three: positive, negative and neutral

Basics of Physics Worksheet-8

1. Which of the following energy can be used to produce electrical energy?

A. Mechanical energy                  B. Chemical energy

C. Solar energy                             D. All of the above

2. Negative charge particles ______ positive charge particles.

A. attract           B. repel              C. obstruct        D. enhance

Basics of Physics Worksheet-9

1. Global warming focuses on an increase in the level of which gas in the atmosphere?

A. ozone                                         B. carbon dioxide

C. sulfur dioxide                           D. nitrous oxide

2. Before a lightning bolt strikes, clouds build up ________.

A. Magnetic charge                     B. Ion flux