Join the Amoeba Sisters as they take a brisk "stroll" through their biology playlist! This review video can refresh your memory of major concepts, help you identify what you need to re-study, and reinforce vocab. Expand these details for...

In this short video we will answer a standardized test question using order of operations. We will rewrite subtraction to add the opposite. We will learn that we can add repeated addition in any order. We will add the positive values...

MOT 1943: ROCKEFELLER PLAZA EXHIBIT: HD: HA LS (Facing 5th Avenue) United Nations Exhibition in the Channel Gardens sponsored by the United States Office of War Information (OWI), people walking between buildings, UN Member country flags...

In this short math video we will answer a standardized math test question where we are counting unit cubes to find volume. We will begin by checking the unit of measure. We will then review how to find the volume of a cube or...

Some have described article 218 as the new article 50. Article 50 explained how the negotiations for the withdrawal agreement would work. Soon we the UK will begin looking at negotiating a future relationship with the EU, and that...

Descubre por qué los objetos pueden seguir moviéndose por sí solos y por qué la mayoría de ellos termina deteniéndose.
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Twig - Física - Fuerzas - Las leyes del m
ov
imiento

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laves de aprendizaje
El...

Existen tres formas de transferir el calor: conducción, convección y radiación. ¿Cómo funciona cada uno de estos procesos y para qué son útiles?
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Twig - Física - Energía y Radiactividad -
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l calor

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Desde las ondas de radio a los rayos gamma, el espectro electromagnético es útil por muchas razones. ¿En qué se diferencian estas radiaciones y cómo podemos utilizarlas?
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Twig - Física - Las ondas - El espectro...

La nieve se forma en la atmósfera cuando las moléculas de agua se depositan sobre bacterias, que actúan como núcleos. Los científicos han encontrado formas de manipular el proceso de congelación del agua así como la producción...

¿Qué diferencia existe entre los sólidos, los líquidos y los gases? ¿Cómo se comporta cada estado?
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Twig - Química - Los átomos y los enlaces - Los estados de l
a
materia

C
laves de aprendizaje
La...

En los fuegos artificiales se combinan varios procesos químicos (desde la combustión hasta la espectroscopia) que derivan en espectáculos de luces impresionantes. Descubre lo que pasa cuando se prende la mecha.
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Las leyes del movimiento de Isaac Newton nos explican la relación entre las fuerzas que actúan sobre un objeto y cómo ese objeto se mueve -los principios que subyacen bajo la moderna mecánica.
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Twig - Física - Fuerzas...

MOT 1951: CHINESE AIRPLANES: Nationalist Chinese (Republic of China) airplanes in flight airfield w/ airplanes parked soldiers in front of parked transport airplanes. Fighter plane being pulled into hangar. Mechanics working on airplanes...

This video lesson provides guided practice to prepare for a Grade 7 Common Core Mathematics cumulative assessment. The questions that are presented and modeled are the released 2018 MCAS Session B questions. A calculator IS permitted...

This video lesson provides guided practice to prepare for a Grade 8 Common Core Mathematics cumulative assessment. The questions that are presented and modeled are the released 2018 MCAS Session A questions. A calculator is not...

MOT 1944: NEW YORK CITY: WS Street scene, people walking crowded sidewalk. Political commentator Sumner Welles speaking at podium (No SOT). MS 'The Time for Decision' books by Welles on display.

La tragedia del Hindenburg fue uno de los mayores desastres de la aviación en el siglo XX. Se piensa que fueron ciertas reacciones químicas las provocaron la destrucción del dirigible, pero ¿cuáles?
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Twig - Química...

The covid-19 pandemic has caused economic chaos and uncertainty. Zanny Minton Beddoes, our editor-in-chief, and Edward Carr, our deputy editor, answer your questions about the global economy

In this short video lesson we will answer a standardized test question using the commutative property. We will consier all the multiple choice answers. We will identify that the left side of the number sentence is the same for all...

In this short video, we will solve a standardized test question by writing a proportion. We will identify key terms and review proportional relationships.

In this short math video we will answer a standardized math test question where we need to determine which number value is evenly divisible by 9. We will review the divisible by 9 rule and apply it to each of the answer choices. We...

In this short video we will answer a standardized math test question where we are asked to interpret circle graphs to answer an open response math test question. We will understand that a circle graph represents 100% and is divided or...

In this short video we will answer a standardized math test question where we are asked to identify an equivalent expression. We will review like terms - variable terms and constant terms. We will discuss that you cannot add a variable...

Lung cancer is the deadliest of cancers. Screening could save thousands of lives, so why is it not the norm?