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Rainforests for Kids | Learn all about the two types of rainforests Teacherflix 20 צפיות • לִפנֵי 2 שנים

Rainforests for Kids explores the world of these dense, wet regions of the world. There are two kinds of rainforests—temperate and tropical. Despite covering less than 3% of the earth's surface, rainforests are home to more than half the world's animal species! They are essential to life on earth because they help maintain the fresh water supply and provide oxygen to the atmosphere. The world's climate depends on rainforests!

When you compare temperate and tropical rainforests, you will find a few differences. Tropical rainforests are closer to the equator and are thus a little warmer and have more rainfall. Temperate ones are found in cooler coastal areas. You can find a rainforest in every continent except for Antarctica. The largest rainforest in the world is the Amazon rainforest. Over 20% of the earth's oxygen is produced by the vegetation there!

There are four layers to a rainforest: emergent, canopy, understory, and forest floor. Different animals live in different layers. Small monkeys and snakes, for instance, live at the top. At the bottom, you would find leopards, elephants, and gorillas. The video describes some interesting facts about three cool animals in particular. Keep watching to learn more!

We hope you and your student(s) enjoyed learning about these amazing forests! If you want to learn even more, head over to our website and download one of our many free lesson plans about rainforests, full of activities, worksheets, and more!

https://learnbright.org/lesson....s/science/rainforest

What you will learn in Rainforests for Kids:
0:00 Introduction to rainforests
0:53 Two kinds of rainforests: temperate and tropical
1:41 The Amazon rainforest is world's largest rainforest
2:22 Emergent and canopy layers
3:09 Understory and forest floor layers
4:00 What lives in a rainforest?
5:31 Humans in the rainforest
6:09 Why rainforests are important
7:26 Review of the facts

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#RainforestForKids
#Rainforest

Periodic Table Elements by Countryballs Teacherflix 9 צפיות • לִפנֵי 2 שנים

Credit to @AsapSCIENCE for creating this song: https://www.youtube.com/watch?v=rz4Dd1I_fX0

This video features all 118 elements of the periodic table. However, each element shown also includes a countryball / polandball /country referencing their historical and scientific uses.

"The Periodic Table Song but with Countryballs"

Based on the "Can-Can" music, by Offenbach.

LYRICS:

There's Hydrogen and Helium
Then Lithium, Beryllium
Boron, Carbon everywhere
Nitrogen all through the air

With Oxygen so you can breathe
And Fluorine for your pretty teeth
Neon to light up the signs
Sodium for salty times

Magnesium, Aluminium, Silicon
Phosphorus, then Sulfur, Chlorine and Argon
Potassium, and Calcium so you'll grow strong
Scandium, Titanium, Vanadium and Chromium and Manganese

CHORUS
This is the Periodic Table
Noble gas is stable
Halogens and Alkali react agressively
Each period will see new outer shells
While electrons are added moving to the right

Iron is the 26th
Then Cobalt, Nickel coins you get
Copper, Zinc and Gallium
Germanium and Arsenic

Selenium and Bromine film
While Krypton helps light up your room
Rubidium and Strontium then Yttrium, Zirconium

Niobium, Molybdenum, Technetium
Ruthenium, Rhodium, Palladium
Silver-ware then Cadmium and Indium
Tin-cans, Antimony then Tellurium and Iodine and Xenon and then Caesium and...

Barium is 56 and this is where the table splits
Where Lanthanides have just begun
Lanthanum, Cerium and Praseodymium

Neodymium's next too
Promethium, then 62's
Samarium, Europium, Gadolinium and Terbium
Dysprosium, Holmium, Erbium, Thulium
Ytterbium, Lutetium

Hafnium, Tantalum, Tungsten then we're on to
Rhenium, Osmium and Iridium
Platinum, Gold to make you rich till you grow old
Mercury to tell you when it's really cold

Thallium and Lead then Bismuth for your tummy
Polonium, Astatine would not be yummy
Radon, Francium will last a little time
Radium then Actinides at 89

REPEAT CHORUS

Actinium, Thorium, Protactinium
Uranium, Neptunium, Plutonium
Americium, Curium, Berkelium
Californium, Einsteinium, Fermium
Mendelevium, Nobelium, Lawrencium
Rutherfordium, Dubnium, Seaborgium
Bohrium, Hassium then Meitnerium
Darmstadtium, Roentgenium, Copernicium

Nihonium, Flerovium
Moscovium, Livermorium
Tennessine and Oganesson
And then we're done!!

20 7 / 39 8 92 / 92 60 68 16 73 60 / 90 53 16 ?

#countryballs #science #chemistry

Solving Systems of Equations... Elimination Method (NancyPi) Teacherflix 15 צפיות • לִפנֵי 2 שנים

MIT grad shows how to use the elimination method to solve a system of linear equations (aka. simultaneous equations). To skip ahead: 1) For a BASIC example where terms cancel right away when you add the equations, skip to 0:25. 2) For an example in which you have to MULTIPLY ONE EQUATION by a number before adding the equations, skip to time 6:26. 3) For an example in which you have to MULTIPLY BOTH EQUATIONS by numbers before adding, skip to 12:12. P.S.) For HOW TO SUBTRACT equations instead of adding them, if you'd rather do that, skip to 18:00. Nancy formerly of MathBFF explains the steps.

Follow me on Instagram! https://instagram.com/mathnancy
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For how to solve a system of linear equations by the SUBSTITUTION METHOD, jump to: https://youtu.be/YriMMWbndn0

What does it mean to solve a system of equations using the elimination method? It means to solve for the x and y values that make both equations true, using the elimination method. Elimination is just one way of solving (substitution is another way) and is sometimes called linear combination. Here's how:

1) BASIC ELIMINATION: First, make sure the equations are ordered in the same way, with their like terms lined up vertically. Then, try adding the equations (vertically) to make a new equation. If a term in the first equation has the same number coefficient but opposite sign (like 5y and -5y), then adding the equations will mean that those terms cancel. Since those terms disappear (in the example, 5y and -5y), there is just the variable x left in the equation so you can solve for x. Once you solve for x, you can take that number and plug it in for x in either of the original equations in the system, to solve for the other variable, y. The (x,y) pair is your solution.

2) MULTIPLY ONE EQUATION BEFORE ADDING: Sometimes terms don't immediately cancel when you add the two equations. What do you do then? Try multiplying one of the equations by a number (both the left and right sides) to make either the x terms or y terms have similar coefficients (but opposite sign), like positive 4x and negative 4x. Then add the two equations (the new version) and follow the same steps as in the first example.

3) MULTIPLY BOTH EQUATIONS BEFORE ADDING: If it does not help to just multiply one equation by a number, you may need to multiply both equations, separately, by numbers. If you check to see whether you can just multiply one equation by a number and add opposite terms/eliminate a variable, and it is not possible, then aim for an LCM, or least common multiple, by multiplying each equation by a different number, and then adding the equations.

P.S.) YES, YOU CAN SUBTRACT INSTEAD (if you want): If you have a system that has the exact same x terms or exact same y terms in both equations, if you prefer, you can just subtract the equations. Alternatively, if you still wanted to add the equations, you could just multiply one of the equations by -1 first and then add the equations and solve normally.

IMPORTANT: If you get something like 0 = 0 or 8 = 8, or something like 1 = 2 or 0 = 21 when you are following these steps and trying to solve, then you have probably found a special case. If you get something TRUE like 0 = 0 (a number equals the same number), then there are an infinite number of solutions to the system, and you can just write "infinitely-many solutions". If instead you get something FALSE like 0 = 21, then there is no solution (inconsistent system), and you can write "no solution".

For more of my math videos, check out: http://nancypi.com