Independent and dependent variables and constants
Answer:
The only one that makes sense IF the model behaves as the Earth is D.
Explanation:
Question 5 is the second one.
Answer:
Isotopes of an element are atoms of the same element that have different number of neutrons.
Answer:carbon-14 levels in the atmosphere
Explanation:
When carrying out radiocarbon dating, the level of carbon-14 in a sample is compared with the level of carbon 14 in the atmosphere because, objects exchange carbon-14 with the atmosphere.
Comparison of the activities of carbon-14 in the atmosphere and in the sample gives the age of the sample since the half-life of carbon-14 is a constant.
