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What’s the atmosphere? Weather science

By |2019-02-05T05:47:27+00:00August 19th, 2017|Physics|

Earth's atmosphere: Did the Earth look like this right after it cooled down? What is the atmosphere? The atmosphere is the air that is wrapped all around a planet. Read more about planets Why is the sky blue? All our physics articles Do all planets have atmospheres? Not all planets have atmospheres. In order [...]

What are E. coli bacteria? Cell biology

By |2017-05-28T22:11:41+00:00May 28th, 2017|Biology|

E. coli bacterium under a microscope E. coli are a very common kind of prokaryote cell that lives mainly inside mammals and birds, including inside you. They can only live for a short time on their own, because they have evolved over time to live inside animals. E. coli live in your intestines, [...]

How to make yogurt – Prokaryote project – Biology

By |2018-04-16T10:27:53+00:00May 28th, 2017|Biology|

A girl making yogurt in Mongolia: how to make yogurt! Yogurt and bacteria To see some prokaryotes in action, you can make your own yogurt. Yogurt is what happens to milk when bacteria get into it and reproduce. The bacteria eat the sugar(lactose) in the milk for energy to live and reproduce themselves. [...]

What is cytoplasm? Parts of a cell – Cell Biology

By |2017-05-28T16:11:54+00:00May 28th, 2017|Biology|

A very simple cell (seen through a microscope) Inside all cells, from the most simple to the most complicated, there is cytoplasm. Cytoplasm is what all the rest of the stuff inside the cell floats in. Originally, cytoplasm was just the sea water that was inside the lipid membrane bubble when it first [...]

What is a chloroplast? Parts of a cell – Biology

By |2018-04-16T10:16:02+00:00May 28th, 2017|Biology|

Chloroplasts (seen through a microscope) The first cells that could make sugars out of sunlight and carbon dioxide and water by photosynthesis probably evolved around 3.8 billion years ago. They were prokaryotic cells that looked blue-green, because they needed to absorb all the warmer wavelengths of light and reflect the cooler blue and [...]