# Basics of Physics Worksheet-8

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

1. Negative charge particles ______ positive charge particles.

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

1. What precious resource do glaciers  contain?

A. Largest amount of earth's salt water.

B. Largest amount of earth's fresh water.

C. Debris that is used as fuel.

D. None of the above

1. The method of heat transfer by the flow of a liquid or a gas is called ______.

A. Radiation      B. Convection   C. Conduction D. Transportation

1. Invisible light wave that are beyond the violet color (on the right side) are called _____.

A. Ultrared waves                       B. Infraviolet waves

C. Infrared waves                        D. Ultraviolet waves

1. Which of the following object will reflect almost all of the light that fall on it?

A. Cotton           B. Coal               C. Wood             D. Mirror

1. If you have to move a big container, which surface should you choose to make your work easy?

A. Small Step Stairs                    B. Large Step Stairs

C. Smooth Inclined plane           D. Rough Inclined plane

1. A north pole of a magnet will _____ the north pole of another magnet.

A. Pull                B. Push               C. Repel             D. Heat

1. If there is no friction force and no stopping force applied to an object, what will happen to a moving object?

A. It will not move

B. It will keep moving forever

C. It will only move one unit distance

D. It will move for one hour

1. What is the reflection of a sound wave?

A. Some of the energy of a sound wave bounces off when it hits a surface.

B. Some of the energy of a sound wave is lost when it hits a surface.

C. It is opposite of echo.

D. Change in frequency of a sound wave when it hits a surface.