Heat, Motion and Time Sample Questions for Class 7
Question 1
Which of the following is correct statement about heat?
A. Heat moves from one substance to another when they have same temperature
B. Heat can cause contraction of a substance
C. Heat has same effect on solid , liquid and gas
D. Heat increases kinetic energy of the molecules of a given substance
Question 2
Reena cuts potatoes and cooks it which change is it?
A. Chemical change
B. Physical change
C. Both a and b
D. None of the above
Question 3
Molecules move from ______ to ______ .
A. Cold to hot
B. Same temperature to same temperature
C. Hot to cold
D. All of the above
Question 4
Arrange in descending order the mode of heat transfer from one substance to another.
A. Conduction,convection,radiation
B. Radiation,convection,conduction
C. Radiation,conduction,convection
D. Convection,radiation,conduction
Question 5
The graph of distance versus time for uniform motion is a ______ line
A. Straight
B. Horizontal
C. Vertical
D. None of the above