Why ice float in lake
1 – Frozen ice is less dense than liquid water. That is why ice cubes float in your drink! 2 – In fact at positive 4 °C , water is the most dense. Colder than that , and the density decreases , and also warmer than that , the …
Animal Cell
1 – All living organisms are composed of cells. 2 – Animal cells are too small to be visible to the naked eyes. Some of these cells are so tiny that even 1 million of them together hardly cover a space as large as the pointed end of a …
Bacteria
1 – Bacteria are single-celled organisms. 2 – They come in all sorts of shapes including rods , spirals , and spheres. 3 – They can live almost everywhere on earth from near boiling water , to the deepest ocean , inside the rock and even in ice. They …
The DNA
1- DNA exists in the nucleus of every cell in your body , in the nucleus of every cell of every living thing. 2- There are about 100 trillions cells in the human body. 3- You have the same DNA in every cell of your body. Every time a …
Plant Cell
1- A plant cell is the structural and functional unit for all plant organisms. 2- A plant cell is extremely small. It is only visible on a microscope. There are millions of cells in an organism. Here are some fascinating facts you should know about plant cells :- 3- …
Virus
1- What is a virus? A virus is a microbe. A microbe is a tiny one-celled living organism , too small to be seen with just your eyes. Other types of microbes are: bacteria , protozoa , and fungi. 2- There are a million viruses per milliliter of seawater. …
Atom
1 – An atom is the smallest particle of an element still having the same chemical properties of the element. 2 – Atoms are the basic building blocks of matter that make up everyday objects. A desk , the air , even you are made up of atoms! 3 …
Electrons
1 – Each atom is made up of a nucleus and a number of electrons moving in orbital shells at great distances from the nucleus. 2 – Electrons are particles spinning and revolving around the nucleus of the atom similar to the earth rotating on its own axis as …
Isotopes
1 – The atoms of an element can exist in different types. These are called isotopes. 2 – Isotopes are atoms that have the same number of protons and electrons , but a different number of neutrons. 3 – Changing the number of neutrons in an atom does not …
Molecules
1 – Everything around you is made up of molecules. This includes you! You are actually made up of trillions and trillions of different types of molecules. 2 – Molecule is a group of two or more atoms that stick together. 3 – Molecules are so small that nobody …