Q.1.
Which force is exerted by a surface when it rubs against another surface?
Q.2.
What do we call a push or a pull upon an object which is caused by another object?
Q.3.
What do we call a material which allows heat or electricity to pass through it?
Q.4.
What do we call friction that is caused by air or water?
Q.5.
Which word describes the 'highness' or 'lowness' of a sound?
Q.6.
Which force pulls everything towards the center of the Earth?
Q.7.
Which force is caused by the pull of gravity on an object?
Q.8.
Which word means to bounce off a surface, without being absorbed?
Q.9.
Which of these words means to spin on an axis?
Q.10.
What do we call something which produces its own light?