What are diatoms?
Diatoms are a major group of algae and are among the most common types of phytoplankton.

Diatoms are unicellular organism, although they can form colonies
They have cell walls made of glass

Diatoms belong to kingdom Protista

There are at least 100,000 species of diatoms have been discovered,
Diatoms exist in large numbers in most bodies of water throughout the world. In fact, just one quart of seawater can contain millions of diatoms
They are primary producers and create and are a very large food source in the ocean


Diatoms are autotrophs and produce energy by photosynthesis.As a result,, diatoms need sunlight, carbon dioxide, and water. They are found in the ocean, fresh water, and even moist topsoil

Many Diatoms are microscopic, but some measure a millimeter across.

Diatoms contribute enormous amounts of oxygen to our atmosphere.

Two basic forms of these organisms exist. They are known as Centrales Centrales have radial symmetry and are most often found in oceans and are wheel-shaped. They can be found drifting near the surface, sunlight and absorbing nutrients.Pennales tend to be elongated

Many Pennales live in fresh water streams, swamps, ditches, or on the bottoms of shallow regions of oceans and estuaries.

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Plankton
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The relationship between cellular respiration and photosynthsis

The structure and function of the small intestines. This coiled organ which is part of the digestive system is found roughly behind your belly button.
How large is the small intestine? About 22 or 23 feet long.
The intestines are divided into 3 parts. The duodenum, the jejunum, and the ileum
The small intestines also contain hairlike projections called villi that help absorb nutrients

In this video, I explain balanced and unbalanced forces from a physics viewpoint.
Balanced forces do not cause movement or a change in speed.
Unbalanced forces cause an object to move in the direction of the greater force.

Examples of balanced forces acting on an object

Pool balls that are balanced being struck by an unbalanced force.
Lifting weights The downward pull of gravity is balanced by the resistance force of the weight stand.
Using a car jack creates an unbalanced force upward.
A car at rest being struck by another car causes the forces to be unbalanced and movement in the direction of the force.

Malleability and Ductility-- Malleability and Ductility
Malleability is the ability of an object to be hammered into shapes.
Most metals are malleable.
Copper, gold, and silver are very malleable.
Ductility is the ability of an object to be stretched into wires.
Ductility and malleability are physical properties.

The deciduous forest biome is known for having four seasons and trees that drop their leaves in the winter.
This biome is located in the eastern half of the United States, Canada, Europe, parts of Russia, China, and Japan.
The deciduous forest has moderate winters and warm summers. It receives around 50 inches of rain a year. This rainfall allows trees like oak, maple, and beech trees to grow in this forest.
You will find bear,fox, and deer in this biome

Element vs Compound
An element is a pure substance. In other words, an element cannot be broken down into a simpler substance by physical or chemical means.An element is made up of only one type of atom. An atom consists of a proton, neutron, and an electron. Some common examples of an element would be carbon, oxygen, or iron. The elements are arranged in the periodic table based on their number of protons. For example, sodium has 11 protons, potassium has 19
The number of protons of elements always stays the same.
Each element also has its own unique set of properties.

A compound is a pure substance of two or more elements chemically combined. Elements combine during a chemical change. A particle of a compound is called a molecule.
When the elements combine chemically a new substance is created.
The compound has different properties than the elements that make it
Hydrogen and oxygen are gases but they combine to make liquid water.
Here are some items that combine to make compounds
Table salt is sodium and chlorine
Glucose is made of carbon-hydrogen-oxygen
When elements create a compound they always join in a specific ratio
The ratio of water is hydrogen to oxygen is 2 to 1
If a compound has a different ratio of hydrogen to oxygen then it is not water
Glucose a type of sugar has a ratio of c6 h12 o6 which is 6 carbons 12 hydrogens and 6 oxygens
Glucose will always have this same ratio
Compounds are all around you
In the food you eat, the school supplies you use, your clothes and even you

The cytoplasm is the fluid found in cells.
Cytoplasm is found in eukaryotic and prokaryotic cells.
The fluid of cytoplasm is called cytosol. It is made up mainly of water
The organelles are found floating in this liquid along with many other items
You can almost think of the cytoplasm as a crowded swimming pool

Learn how to set up a basic tree diagram and then solve for the total number of choices and the probability of a certain event.
In this tree diagram probability example John has to decide what to wear to school. He needs to decide on his shirt, pants, and shoes.
The tree diagram will help you figure out the total outcomes and the probability.