Heat Energy

Heat Energy Worksheet-4

1. In the experiment below, when the flask was placed in hot water, the level of the drop of ink dropped and then rose because the ____ expanded first, followed by the expansion of ____

(a) Flask; air in the flask

(b) Air in the flask; flask

(c) Water; air in the flask

(d) Air in the flask; water

2. Telephone wires are always hung loosely between two poles to allow for _______

Heat Energy Worksheet-5

1. Amit found that a glass P was stuck inside another glass Q. What could he do to separate the two glasses

(a) Pour hot water into glass P and put glass Q in hot water.

(b) Pour hot water into glass P and put glass Q in cold water.

(c) Pour cold water into glass P and put glass Q in cold water.

(d) Pour cold water into glass P and put glass Q in hot water.

2. Mercury is used as a thermometer substance because

(a) It is very costly

(b) It expands less than glass

(c) It does not wet the wall of the glass tube

(d) None of these

Heat Energy Worksheet-6

1. Which one is correct relation between ºC and ºF?

(a)

(b)

(c)

(d)