How to calculate the discounted price including sales tax

Thursday, December 6, 2018

How to calculate the discounted sales price.

Different layers of atmosphere

Thursday, November 29, 2018

The earth is surrounded by a very thick layer of gases called the atmosphere.

The atmosphere is divided into 4 layers based on temperature changes. The first layer is the troposphere and this is the location of our weather. We live in the troposphere and the temperature changes often in this layer. However, as you go higher in the troposphere the temperature drops. This layer of the earth extends 10 kilometers upward.
The stratosphere is where you find the ozone layer. The ozone protects us from harmful ultraviolet radiation given off by the sun. As you go higher in the stratosphere, temperatures also get higher.
The mesosphere is very cold and reaches 80 kilometers above the earth. This layer burns up space junk which would strike the earth. This is because there is enough air in this layer to cause friction and burn up the debris.
The thermosphere is the hottest layer of the earth's atmosphere and is where satellites orbit. The thermosphere is on the edge of space and many of our satellites orbit in this layer.

MooMooMath and Science upload a new math or science video every day. We have over 1400 math and science videos to help in school and life.

How clouds are classified

Tuesday, November 27, 2018

How are clouds classified?

Clouds are created when water vapor in the air cools off, condenses and tiny droplets are formed.

Clouds can be classified based on form and altitude.

Cumulus clouds are puffy clouds that seem to just float along. However, these clouds can produce thunderstorms if they become a large cloud called a cumulonimbus cloud.

Stratus clouds are clouds that form in layers. These clouds may cover a large area and can often block out sunlight.

Cirrus clouds may appear like feathers and form when the wind is strong.

Clouds can also be classified based on altitude.

Many stratus clouds are found low. For example, stratocumulus, and nimbostratus clouds are found low in the atmosphere.

The prefix alto is used to describe clouds of middle altitude, and cirrus clouds are found very high in the atmosphere.

Cold Warm Occluded Stationary-Types of Weather Fronts

Saturday, November 17, 2018

Types of weather fronts

There are four main types of fronts. Weather fronts occur when large masses of air which has different temperatures interact.
Cold air is denser than warm air and therefore wants to settle below this warmer air.
The warm air moves upwards and cools which may result in rain, sleet, snow, or hail.

Four types of fronts

Cold front: When cold air overtakes warm air

Warm front: When warm air overtakes cold air

Occluded front Warm air gets trapped between cold two cold fronts

Stationary front: Two air masses of similar density meet each other and become stationary

How to change a recurring decimal to a fraction

Thursday, November 15, 2018

How do you convert a recurring decimal into a fraction?
For example, convert .333 to a fraction.
Follow these steps to convert the recurring decimal to a fraction
Step 1:
Set up an equation by setting x equal the repeating decimal you are trying to convert to a fraction.
This is equation one.
Step 2:
Set up a second equation in which the repeating decimal is to the left of the decimal point. This is equation two.
In order to do this, you will have to multiply x by a factor of 10
Step 3:
Subtract equation one from equation 2
Step 4:
Solve for x
Step 5:

Example problems
Example 1. Change .666 to fraction form.
Step 1. X = .6666
Step 2.
In order to have the repeating decimal to the left of the decimal, you need to move the decimal one place to the right.
Remember, what you do to one side of the equation you must perform on both sides.
Multiply both sides by 10
10x = 6.666
Step 3. Subtract equation 1 from equation 2
10x = 6.66
   X = 0.666
9x = 6
Step 4. Solve for x

9x = 6
9   = 9
X = 6/9 which equals ⅔
Example 2
Convert the decimal .1616….. to a fraction
Step 1. X = .1616
Step 2. 10x = 16.1616…
Step 3.
100x = 16.1616
- x   = .1616
99x = 16
Step 4.
99x = 16
99       99
X = 16/99
Step 5
Simplify the fraction
16 / 9 = 2
99/ 9 = 11

MooMooMath and Science upload a new math or science video every day. We have over 1400 math and science videos to help in school and life.

How blood flows through the body

Monday, November 12, 2018

How does your blood flow throughout your body?
The circulatory system is the transportation system of the body and is responsible for the flow of blood in the body. The major structures that make this possible are the heart, blood vessels, and blood.
The heart pumps blood in order to move nutrients oxygen, carbon dioxide disease-fighting white blood cells, and hormones to and from the cells in the body.
The circulatory system has two main types of circulation.

The pulmonary
The Systemic
Pulmonary circulation travels from heart to the lung where your blood picks up oxygen and back to the heart.
Systemic circulation is from the heart to the entire body

Your heart has four chambers that are used to pump blood throughout your body.

Two Atria - which are the upper chambers.
Two ventricles - these are the lower chambers
The left and right side of the heart is divided by the septum

Blood Vessels carry blood throughout the body.
Arteries carry blood away from the heart and veins carry blood towards the heart

Capillaries, which are the smallest blood vessels in the body create a network of vessels connecting veins and arteries.

In summary, the heart pumps blood to the body through the arteries and  returns blood to the Body through the veins

You have around 1.5 gallons of blood in your body
It is composed of several different types of cells.
The first type of blood cell is the red blood cell. Red blood cells help carry oxygen

The second type of blood cell is known as the white blood cell and helps fight pathogens

The third type of cell is the platelet and create blood clots.
These blood cells are found in a liquid called plasma which consists of water along with electrolytes and some proteins and hormones.

The flow of blood through the heart

Blood enters on the right side of the heart from the superior and inferior vena cava. This blood is oxygen-poor because the blood has traveled around the body and the oxygen in the blood has been exchanged for carbon dioxide.
The blood enters the right atria and travels through the tricuspid valve and into the right ventricle.
From this chamber, this oxygen-poor blood travels up the pulmonary artery and into the lungs. Oxygen is exchanged for carbon dioxide and it travels back to the heart full of oxygen.
The blood travels into the left atria and then goes through the mitral valve into the left ventricle.
From the left ventricle, it travels through the aortic valve and out of the aorta and into the entire body.

In summary, The job of the circulatory system is to circulate blood to and from cells in the body in order to transport nutrients and oxygen and remove carbon dioxide and waste.

Additional resources

The flow of blood video

Pathway of blood Quizlet

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LCM and GCF of 9 12 and 15

Sunday, November 11, 2018

The GCF or greatest common factor is the largest positive integer that will divide into each number evenly.

For example, the greatest common factor of 9 and 12 would be 15.

There are several different names for the GCF ( greatest common factor)

  • GCD Greatest Common Denominator
  • HCF Highest Common Factor
  • GCD Greatest Common Divisor
The GCF for 9, 12 and 15 equals 3

The lcm or least common multiple is the smallest positive integer that two or more numbers will divide into evenly. Again, a zero remainder.

Other names for the LCM
  • LCD Least Common Denominator
  • LCD Least Common Divisor
The LCM of 9,12 and 15 = 180

I like to use a factor tree to find the LCM and the GCF

Once you find all of the prime factors of a number, to find the GCF you multiply all of the factors, but multiply duplicates in each number only once.

In order to calculate the LCM you look for factors in each number and multiply these common positive integers together.

In summary,

The Greatest Common Factor, Greatest Common Denominator, Highest Common Factor of
9,12, and 15 = 3

The Least Common Multiple, Least Common Denominator, Least Common Divisor of
9,12, and 15 = 180

MooMooMath and Science upload a new math or science video every day. We have over 1400 math and science videos to help in school and life.
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