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Copper – Atoms, Elements, and Chemistry

By |2019-04-24T18:25:23-07:00June 1st, 2017|Chemistry|

Diagram of a copper atom What is copper? Copper is a kind of atom that has only one electron in the outermost ring. What's an electron? What are atoms? A project with copper pots All our chemistry articles Where does copper come from? Copper is a fairly heavy atom, that can only be [...]

How do cells get rid of waste? Excretion and cell biology

By |2018-12-27T09:35:02-07:00May 28th, 2017|Biology|

Cell waste: A cell with a vacuole Cell waste and vacuoles Soon after eukaryote cells began to make vacuoles to help them catch their food and store it, about 600 million years ago, the cells also began to use the vacuoles to get rid of garbage in the cell - molecules that the [...]

What are enzymes? Cell biology

By |2018-04-15T17:01:40-07:00May 28th, 2017|Biology|

A model of an enzyme reacting with another molecule and breaking it into two pieces. Each little ball represents an atom.This enzyme, lysozyme, breaks up bacteria in your blood to keep you from getting sick. An enzyme is a kind of big, complicated protein molecule, made mainly of hydrogen and carbon atoms, but [...]

Enzymes project – Bread and Spit – Science Activities -Biology

By |2017-05-28T17:33:50-07:00May 28th, 2017|Biology, Food|

A loaf of bread You can easily taste how your enzymes work breaking down your food into smaller pieces. Do this experiment right after lunch, when you'll have a lot of enzymes in your saliva. Get a slice of plain bread (a starch) and chew it slowly. Keep chewing for a long time, but [...]

Cell digestion – Parts of a cell – Cell Biology

By |2017-05-28T16:18:53-07:00May 28th, 2017|Biology|

Amoeba - a one-celled organism All cells have to have some way to get energy from outside themselves, or they will starve to death. The earliest, simplest cells, about 3.5 billion years ago, got their food by drifting around in the ocean until they came to a molecule of protein or another hydrocarbon. Then they let [...]

What is cytoplasm? Parts of a cell – Cell Biology

By |2017-05-28T16:11:54-07:00May 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 [...]