Heat, Motion and Time Sample Questions for Class 7
Question 1
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 2
Which of the following is incorrect statement?
A. Heat is form of an energy
B. Heat can cause increase or decrease in temperature
C. Heat affects living organisms
D. Heat causes chemical changes
Question 3
Which of the following will show greater effect of heating?
A. Heating a iron bar
B. Heating of air
C. Heating of water
D. Heating of alcohol
Question 4
Lower fixed point of pure water is _______
A. 32 F
B. 212 C
C. 0 F
D. 100 C
Question 5
Which of the following liquid can be used in thermometer instead of Mercury?
A. Water
B. Glycerine
C. Alcohol
D. Vinegar