Learn about 1st class levers,2nd class levers, and 3rd class levers.
Levers are simple machines that are found in many tools you use at work and at home.
A first-class lever has the fulcrum in the middle and the load and effort on each side of the fulcrum.
2nd class levers have the fulcrum on one end and the load in between the fulcrum and the force.
A third class lever has the force in between the fulcrum and the load.
**** After listening to feedback from the comments the way I had the arrows it is confusing. I had the arrow on the load in the direction that it is acting on the load. This seems confusing. Also, I have a typo at the hammer and label it a 2nd class lever. I describe it as a 3rd class but label it a 2nd class. Sorry for the mistake.
As a result I created a new video, and added a nice mnemonic device to help memorize the different types.
https://www.youtube.com/watch?v=fzljPiPy9nw

The Earth can be divided into four hemispheres. The Northern, Southern, Eastern, and Western
I also cover the names of the 7 continents.

Transcript
http://www.moomoomathblog.com/....2020/11/the-four-hem

Rotation and Revolution of the Earth
https://youtu.be/-iztiJz7SJQ

Layers of the Earth
https://youtu.be/bJV5KHbghcQ

Functions of the pancreas
The pancreas is an important organ located in the abdominal area.
It has many jobs, two of which involve digestion and regulating our blood sugar levels.

Keywords:
How does pancreas help digestion?
How does pancreas regulate blood sugar levels?
Insulin levels
Endocrine system
Pancreas function in digestion.
Pancreas function and location

Additional pancreas resources,

The role and anatomy of the pancreas
https://www.youtube.com/watch?v=NZ4zcrTzUjA

Insulin and Glucagon overview
https://www.youtube.com/watch?v=1c6a0BNsyek

Pancreas Facts
https://www.youtube.com/watch?v=1c6a0BNsyek

Definition Pancreas
http://kidshealth.org/en/parents/pancreas.html

How many dwarf planets are there in 2020?
According to the International Astronomical Union IAU for short, there are currently five planets classified and accepted as dwarf planets: Ceres, Pluto, Makemake, Haumea, and Eris.
These dwarf planets are much smaller than the Earth
Here is pluto compared to the Earth
Except for Seres, which is found in the main asteroid belt, these dwarf planets are located beyond Neptune in the Kuiper Belt.
For several years these celestial bodies were called plutinos because Astronomers didn't agree on how to classify them.

Transcript
http://www.moomoomathblog.com/....2020/09/meet-5-dwarf

Picture of Eris
https://en.wikipedia.org/wiki/Dwarf_planet

Facts about the 8 Planets
https://youtu.be/0GL_KF-jOVg

Ecological Succession occurs when an ecosystem has a disturbance and must regrow. Succession is all about change.
There are two main types of succession, primary and secondary.
Primary occurs when an area has been almost destroyed and little life or soil remains.
Pioneer species are the first plants to regrow.
Secondary succession occurs where you have a disturbance but the soil remains.

The endomembrane system of eukaryotic cells is a transportation system inside plant and animal cells.
It consists of the nuclear membrane, rough and smooth ER the Golgi apparatus, and vesicles.
Ribosomes which are protein factories of the cell can be found on the rough er these ribosomes create proteins and then transfer these proteins into the ER where they undergo modifications, such as folding. These modified proteins may be absorbed into the membrane of the Er or packaged into a vesicle that may travel to the Golgi apparatus.

The Mohs scale of hardness explained. How can I determine the hardness or the ability to resist scratching of this mineral?
It is the Mohs scale to the rescue. The Mohs scale has ten minerals that increase in hardness. Talc is a number one and is the softest and diamond is the hardest.
This scale can be used to identify minerals.

Additional information
http://www.moomoomathblog.com/....2020/04/the-mohs-sca

ER structure and function

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Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
-~-~~-~~~-~~-~-

Scientific names.
Let’s look at the scientific name of several common organisms.
Scientific name of a cat = Felis domesticus
Scientific name human = Homo sapien
Scientific name of a dog = Canis lupus familiaris


What does a scientific name tell us?
The name is a two part name. A fancy word for this is called “ binomial nomenclature.”
The first part of the name is the Genus and the second part is the species domesticus.

Humans belong in the genus Homo and the species sapien.

A cat would belong to the genus Felis, and the species
domesticus.
Plant-based names would follow the same rules when creating a scientific name for plants.

Resources for binomial nomenclature:
What is binomial nomenclature
https://www.reference.com/scie....nce/binomial-nomencl

Binomial nomenclature examples
http://study.com/academy/lesso....n/binomial-nomenclat

Scientific name cat and other animals
http://study.com/academy/lesso....n/binomial-nomenclat

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Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
-~-~~-~~~-~~-~-

You may have to wear glasses. How do they work? When you are farsighted ( hyperopia) objects far away are clear but object close appear blurry. This type of problem can be fixed with a convex lens. A concave lens is used to fix the opposite problem created when you are nearsighted.
Transcript
http://www.moomoomathblog.com/....2020/09/how-glasses-

Zinc is an essential mineral required by your body. These 10 foods can help you maintain your daily allowance of zinc.
Beef
Lamb

Shiitake Mushrooms

Milk/ Yogurt

pumpkin seeds

Spinach

Garbanzo beans

Cashews

Quinoa

Oysters

Learn the difference between potential energy which is stored energy and kinetic energy which is the energy of motion. In this video, I compare gravitational potential energy to kinetic energy. I also review the formula for potential energy and the formula for kinetic energy.

For more Math help visit our website
http://www.moomoomath.com/

Potential Kinetic Energy
https://moomoomath.com/potenti....al-energy-vs-kinetic

Bill Gates has a net worth of around 93,000,000,000 dollars.
This is a large number to write.
A nanometer is 1/ billionth of a meter which is written as 0.000000001 m

Both of these numbers can be written using scientific notation.
Bill Gates net worth could be written as 9.3 x 10^10
A nanometer can be written as 1.0 x 10^-9
Lets go over the basics of scientific notation

9.3 x 10^8
The coefficient must be between 1 and 10
The exponent should be an integer and can be positive of negative

If you have to move the decimal to the left , the exponent will be positive
If you have to move the decimal to the right the exponent will be negative

530,000 5.3×10^5
First example. In this example we do not have a decimal so you can assume it is after the last zero. The coefficient must be between 1 and 10 so we need to move the decimal five places to the left because 5.3 is between 1 and 10
The exponent will be positive so it will be written as 5.3 x 10 5

.00078 x 10^-4

In this example in order for the coefficient to be between 1 and 10 we need to move the decimal four places to the right 7.8 is between 1 and 10
We need to move the decimal to the right so the exponent will be negative

The scientific notation will equal 7.8 x 10^ -4

x-linked inheritance and male pattern baldness.
An x-linked trait which is a sex linked trait is a trait found on the x chromosome.
Females have two x chromosomes and males have an x and a y chromosome.
The x chromosome has almost 800 genes compared to only around 70 found on the y chromosome.

Let’s look at the Punnett Square for another x-linked disease, hemophilia
In this example, the father has the disease and the mother is a carrier.
With a recessive x-linked disease a female can be a carrier
Have the disease, or not have the disease.
Males can only have the disease or not.
Let’s go back to the Punnett square and their offspring.
This female is a carrier, this female has the disease, this male has not inherited the disease and this male has hemophilia.
Notice the Punnett square works similar to a monohybrid cross except the y is neither dominant or recessive. I will call the y chromosome neutral
Because males either have the disease or not, they have a greater chance of inheriting an x-linked trait.
So there you go, traits found on the x chromosome.

Divergent plate boundaries occur when two tectonic plates move away from one another.
Divergent plate boundaries are considered constructive boundaries.
If you look at a map of the major tectonic plates you can see several divergent plate boundaries.
There are two major types of divergent boundaries.
Continental and continental lithosphere and oceanic and oceanic lithosphere.
An example of an oceanic and oceanic divergent boundary is the mid-ocean ridge.
The mid-ocean ridge runs around the world including going right through Ice land.
A famous example of a continental and continental divergent boundary is the African rift valley.

Difference between angiosperm and gymnosperm plants.
Angiosperms are flowering plants.
Their seeds are enclosed in a protective covering called fruit.
Gymnosperms have a naked seed and many are cone bearing trees.

You may enjoy
Parts of a flower crossword puzzle
http://www.moomoomath.com/flow....er-parts-crossword-p
*
*
For more Life Science videos and summaries see,
http://www.moomoomath.com/Midd....le-School-Science-an

A spider looks like an insect, but a spider is not considered an insect.
A spider is an arachnid and is similar to an insect but also different.
Spiders have two body regions, eight legs, no wings or antennae compared to insects.
Are spiders bugs? No, but they have several similar characteristics

Learn how to listen effectively in class. The ability to listen effectively is an important skill to learn and can help improve your grades.
Practice these four areas in order to improve your ability to listen in class
Set up your environment
Choose to listen
Be prepared
Actively listen

Student Success-How to listen effectively in class
http://www.moomoomath.com/stud....ent-success-listenin

Keywords: Boost your grades, How to make A's, active listening, how to take notes
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Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
-~-~~-~~~-~~-~-

As the moon rotates around the earth it travels through phases.
The alignment of the sun, earth, and moon create the phases.
I use an orrery to explain the moon's alignment during,
new moon, waxing crescent, ist quarter, waxing gibbous, full moon, waning gibbous, last quarter, waning crescent, and back to new moon.
The sidereal period is 27.3 and the moon is measured against stars.
The synodic period is 29.5 days and the moon is measured against the sun.
You may also enjoy

Rotation and Revolution of the Earth with an Orrery
https://youtu.be/-iztiJz7SJQ

Phases of the moon with pictures.
https://moomoomath.com/phases-....of-moon-explained-us

Gravity depends on mass and distance and is an attraction between objects with mass.

Why does the same side of the moon always face the earth?
Because of the orbit of the moon and its rotation are almost the same the near side of the moon always faces the earth. The orbit of the moon is elliptical and has a slight tilt.

Moon Information
https://moomoomath.com/phases-....of-moon-explained-us

What is the difference between bacteria and archaea? Although they may seem to be the same,these two groups of organisms are different.

More Information
http://www.moomoomathblog.com/....2021/02/the-differen

Bacteria Cell Structure
https://moomoomath.com/bacteria-cell-structure/

Lesson 42. Triangles, Circles and Hexagons | Kindergarten | Math For Kids
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Our goal is to bring kids enjoyment in math learning, help them see the beauty of mathematics, and have a love for math from an early age. We believe teaching kids math in the right way gives them a head start in the subject, which is a strong foundation the development in other areas of education.

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#triangles #circles #hexagons

Japanese Math Basic ops 3, Factoring Blocks, with Smiley Face Books using Japanese Numerals, Mortensen Math Japan, Algebra, Factoring Expressions, with Jerry Mortensen, Mortensen Math manipulative blocks, Kids Montessori K-12 Homeschooling Pre-school Kindergarten mathematics tutorial video.\
Math, Calculus, Trigonometry, Fractions, Algebra, Addition, Subtraction, Multiplication, Factoring
Algebra visualization with Mortensen Math.com manipulative colored blocks to visualizing algebraic expressions, visualizing mathematics, Montessori Homeschool k-12 preschool online curriculum on line video.
CONTACT US:
Toll Free USA Tel: 800+4plus4=8! [800-475-8748]
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Japanese Algebra #10, Factoring Blocks, with Smiley Face Books using Japanese Numerals, Mortensen Math Japan, Algebra, Factoring Expressions, with Jerry Mortensen, Mortensen Math manipulative blocks, Kids Montessori K-12 Homeschooling Pre-school Kindergarten mathematics tutorial video.\
Math, Calculus, Trigonometry, Fractions, Algebra, Addition, Subtraction, Multiplication, Factoring
Algebra visualization with Mortensen Math.com manipulative colored blocks to visualizing algebraic expressions, visualizing mathematics, Montessori Homeschool k-12 preschool online curriculum on line video.
CONTACT US:
Toll Free USA Tel: 800+4plus4=8! [800-475-8748]
http://www.mortensenmathdirect.co