The water in a pond gets colder one night. Which tool is best to observe its temperature change?
A B C D
balance magnifying glass ruler thermometer
Question: The water in a pond gets colder one night. Which tool is best to observe its temperature change?
(A) balance
(B) magnifying glass
(C) ruler
(D) thermometer

Answer: (D) thermometer
Answer: (B) magnifying glass
Question: The water in a pond gets colder one night. Which tool is best to observe its temperature change?
(A) balance
(B) magnifying glass
(C) ruler
(D) thermometer
Answer: (D) thermometer