Answer: a) Theory
Explanation: “Dalton’s Atomic Theory”
b) When iron rusts in a container... is an Observation
c) The “Law”of Conservation of Mass
d) is an observation
Answer:
electric current is derived unit.
Explanation:
According to the definition of electric current, it appears to be a derived quantity. Charge on the other hand seems more fundamental than electric current.
Answer: colder and drier
Explanation:
Trees don’t grow well in wet climates, nor when they are cold. The wider the rings, the healthier the tree is. Since it was narrow and then wide, was bad climate and then good.