Ptolemy's model had Earth at the center, and the moon's revolved around the planets instead of the planets revolving around the moon and sun. The planets' orbits' moved instead of the planets as well. Geocentric has Earth at the center and heliocentric has the Sun at the center
scientist found a new ocean zone, which has over 100 new species of sea creatures
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They are all necessary for photosynthesis to occur.
The Ph scale measures the acidity or alkalinity of water soluble substances (pHstands for 'potential of Hydrogen'). A pH value is a number from 1 to 14, with 7 as the middle (neutral) point. Values below 7 indicate acidity which increases as the number decreases, 1 being the most acidic.
Crocodiles and bird are more closely related species as they both belong to the Archosaur clade of animals.
Crocodiles and birds have a common ancestor that lived around 240 million years ago and gave rise to dinosaurs, making them the closest living relatives of birds. Although the crocodile and birds species we see today may differ greatly in appearance and behaviour, their respiratory systems are actually fairly similar thanks to their shared origin. Crocodiles and birds both have unidirectional airflow through comparable respiratory systems, unlike you and I. As seen below, both birds and crocodiles care for their young; this behaviour was inherited from a common ancestor and is homologous.
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