A, Mechanical and A, Chemical.
This behavior helps Betty in <u>intellectual </u>development.
Answer:
A physical matter
Explanation:
A kind of matter with uniform physical properties
Answer:
It can be said to be reliable although it is not valid
Explanation:
This is because Reliability means an indicator of consistency, A measure should produce similar or the same results consistently if it measures the same quantity. So does the thermometer measures over 5days but it is not valid because it deviates from the real value