Both Radioactive dating of rocks retrieved from the world and Comparing cratering rates on one world to those on another.
Geologists can find the relative age of impact craters on a world because
the ones on top must be younger.
Scientists know the history of Earth's magnetic field because the magnetic field gets frozen into rocks, and plate tectonics spreads them out.
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Most Communities doesn't benefited from National Water act of 1998 because;
- political issues
- Corruption
- poor management
- poor development
<h3>What is the National Water Act?</h3>
The National Water Act serves as act in 1998 that protect and conserve the use of water resources.
Therefore, National Water Act control Rivers, dams, however not all communities benefited because of poor management.
Learn more about National Water Act at;
brainly.com/question/14284975
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The first one should be it
