As the earth has active tectonics we know that rocks are recycled and the oldest rocks may therefore just be the oldest rocks that have not been recycled yet. We know the true age of the earth by looking at radioactive isotopes of things like spacedust and meteors that formed at the same time as the earth as they have not been affected by the tectonic process of recycling here on Earth.
Answer:
Improved food sources
Explanation:
Artificial selection is also known as selective breeding. Its a deliberate process of breeding plants and animals for better breeds.
It's also called genetic engineering.
This in a way impacts the society positively as crops with better yield are produced. Example is wheat that has more grain or in animals, cow that produces more milk.
Answer:
Explanation:
As the water waves go through the gap they spread out, this is called diffraction.
The longer the wavelength of the wave the larger the amount of diffraction.
The greatest diffraction happens when the gap size is about the same size as the wavelength.
It is because that's a place where no one lives so they're safe.
<span>While the open ocean produces little in terms of biomass, it contributes a great amount to the biosphere because of its serving as a habitat for small, primary producers as well as playing a big role in geochemical cycling.</span>
