Why do we have sunny weather one day and heavy rain the next? Large air masses cause some of our weather. There are four main fronts caused by these air masses.
A cold front which is the result of cold air
A warm front which is caused by warm air rising over cold air.
An occluded front which is a warm air mass stuck between two air masses.
A stationary front which is two air masses with almost the same density and pushes against each other.

Solve percent word problems. These word problems can be solved using part over whole equal percent over 100.
Example problems include,
Martin was given 10 math problems and has answered 7 of the questions. What percent of the problems does he have left?

The Braves won 60% of the 150 games they played. How many games did they win?

There are 32 students in Mr. B’s class. 28 students were present. What percent of Mr. B’s students were present?

The path of food through the digestive system.
Digestion starts at the mouth, travels down the esophagus, enters the stomach, passes through the small intestine, and then the colon. Along the way fats are broken down, sugars are converted, and important nutrients are absorbed by villi and transported by capillaries.

00:00 Introduction to the digestive system
00:30 Digestion begins in the mouth
1:07 Food travels to the stomach
1:31 Enzymes and Bile are added at the small intestine
2:39 Nutrients are absorbed in the small intestine
2:59 Finally water and fats are absorbed at the large intestine

Learn how the digestive system of an earthworm
http://www.moomoomath.com/eart....hworm-digestive-syst

How an earthworm digest the dirt it eats.
In this video, I review the digestive system of an earthworm. Earthworms may appear simple but are complex animals. Their digestion starts at the mouth and ends at the anus.

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Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
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For more Life Science videos and summaries see,
http://www.moomoomath.com/Midd....le-School-Science-an

Learn how to calculate the surface area of a square pyramid.

Tundra biome facts. In this video, enjoy pictures and video clips of this cold biome. The tundra can be divided into two types. The arctic tundra and the alpine tundra. The arctic tundra is found in the north near the poles and is very cold and treeless. The alpine tundra is found at the top of mountains and has a similar climate as the arctic tundra.
In North America, you will find the arctic tundra in Alaska and some cities would include Barrow Alaska, Aklavik, Fort McPherson, Inuvik, Iqaluit, Old Crow, Qausuittuq and Tuktoyaktuk. These cities are all on the northernmost frontier, in the Northwest Territories, the Nunavut provinces and the Yukon Territory. Each of these cities has very long winters and short summers.
The alpine tundra can be found in the rocky mountains, Alps, and Pyrenees mountains

Learn all about different types of slopes. These include positive slope, negative slope, undefined, and a zero slope. The slope is defined as the rate of change or the steepness of a line and is represented by the letter m.
This video will answer a couple of questions like,
What type of slope is a vertical line?
Which line has a zero slope?
What does an undefined slope look like?
Does a positive slope go up or down?

Aquatic Biomes can be divided into two major categories.
Freshwater which includes rivers, streams, lakes, ponds, and wetlands.
Marine which includes the ocean and estuaries.

You may enjoy ....
An Introduction to Biomes
http://www.moomoomathblog.com/....2023/05/an-introduct

more on Aquatic Biomes
https://moomoomath.com/aquatic-biomes/

Learn how to calculate power using the formula for power which is work divided by time.

0:00 Introduction to the power formula.
00:36 Power problem 1 1224 joules of work are applied to the bike pedal while riding a bike up a hill for 18 seconds. How much power is produced?

01:30 Power problem 2 John applied 500 joules of work for 25 seconds when pushing the sled. How much power was produced?

02:20 Calculate time using the power formula How much time is needed to produce 1440 joules of work if 180 watts of is applied to the bike pedal?

03:51 calculate work using the power formula What amount of work is generated when 25 watts of power is applied to the machine for 200 seconds?

You may enjoy.. What is Power?
https://youtu.be/m7oJQsmglrE

Chordates are often divided into 5 main groups. These groups are, fish,amphibians,reptiles,birds, and mammals. Each group of chordates have their own unique set of traits and characteristics.

More on Mammals
https://moomoomath.com/characteristics-of-mammals/

You may also enjoy Reptiles
https://moomoomath.com/what-ar....e-the-characteristic

Limiting Factors in an ecosystemAny biotic or abiotic factor that restricts the number or production of organisms is a limiting factor.

Take this ecosystem found in the fishbowl
The limiting factors would be the size of the bowl, amount of water, will limit the number of fish that can survive in the fishbowl

Limiting factors can be dependent limiting factors and independent factors

Dependent limiting factors depend on the number of organisms
For example, the amount of food available for each organism depends on the number of organisms
An independent limiting factors does not depend on the number of organisms.
For example, the amount of rainfall does not depend on the number of organisms

You also have

Density-Dependent Factors
A limiting factor that depends on population size is called a density-dependent limiting factor.

Density-dependent limiting factors include:
• competition
• predation
• parasitism
• disease

Here is a list of abiotic limiting factors
Sunlight
Climate
Temperature
Water
Space
Soil chemistry
Fire
Natural disasters


Biotic factors limiting factors
Number of plants
Number animals
Amount of competition
Number of decomposers
parasites
Disease causing agents

Types of Human Body Tissue
In this video, I review four types of tissue.
Connective tissue, epithelial tissue, muscle tissue, and nerve tissue.
Tissues are made up of cells working together.
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For more Life Science videos and summaries see,
http://www.moomoomath.com/Midd....le-School-Science-an

Types of Tissue
https://moomoomath.com/types-of-human-body-tissue/

A scientific name uses a two part naming system called binomial nomenclature.
The first part on the name describes the genus the organism belongs to, and the second part is the species.
Transcript
http://www.moomoomathblog.com/....2021/05/all-about-sc

Learn the difference between an element, a compound, and a mixture. An element has the same number of protons, a mixture is two or more elements chemically combined, and a mixture is not chemically combined.

Aprende la diferencia entre un elemento, un compuesto y una mezcla.

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

An introduction to three gas laws. I cover Boyle's law,charles's law, and Gay Lussac's.
For each law I cover the constant, what the law states, the formula, and the density.

00:00 Introduction to Gas Laws
00:20 Boyle's Law explanation
01:07 Charles's Law
01:53 Gay Lussac's law or pressure temperature law

Learn why we have sea and land breezes. Almost anytime you go to the beach you will encounter some wind. This is because of the land and water heating up and cooling off at different rates.
Land warms up and cools off more quickly than water. Warm air creates a low-pressure area and cold air creates a high-pressure area. Air will always flow from high pressure to low pressure and this will generate wind.

Learn about the four Spheres of the earth.
The earth can be divided into four major spheres.
The biosphere which means life.
The hydrosphere which makes up all the water of the earth
The atmosphere which is the air of the earth
The geosphere which is all of the rocks, soil, and layers of the earth.

These four spheres of the earth allow life to exist on planet earth
You may enjoy ....
Layers of the Earth
https://youtu.be/bJV5KHbghcQ

The 4 Spheres of the Earth
https://moomoomath.com/4-spheres-of-earth/

Examples of Deposition-Barrier Island-River Delta-Salt Marsh
https://youtu.be/7s75rHST0p4

Sedimentary Rocks are rocks formed from rock fragments and organic matter.

Sedimentary rocks are formed from pre-existing rocks or pieces of once-living organisms. They form from deposits that accumulate on the Earth's surface or under the ocean. The particles that form a sedimentary rock are called sediment and may be composed of minerals or organic matter.
The following rocks are sedimentary Rocks
Shale, Conglomerate, Limestone, Sandstone

Rock Cycle
http://www.moomoomathblog.com/....2020/04/rock-cycle-d

Learn the difference between physical and chemical changes by observing real life examples.
Is mentos and diet cke a physical or chemical change? Actually it is a phase change so it is a physical change.
I include other example like breaking a piggy bank, fireworks, cutting hair and several other examples. The goal is to help you undertand the difference between a physical and chemcal change by looking at examples.

More on Physical and Chemical Changes
http://www.moomoomathblog.com/....2017/03/physical-and

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-