Students obtain a basic understanding of microfluidic devices, how they are developed …
Students obtain a basic understanding of microfluidic devices, how they are developed and their uses in the medical field. After conducting the associated activity, they watch a video clip and learn about flow rate and how this relates to the speed at which medicine takes effect in the body. What they learn contributes to their ongoing objective to answer the challenge question presented in lesson 1 of this unit. They conclude by solving flow rate problems provided on a worksheet.
The video resource "Migrations and Intensification: Crash Course Big History #7" is …
The video resource "Migrations and Intensification: Crash Course Big History #7" is included in the "Big History" course from the resources series of "Crash Course". Crash Course is a educational video series from John and Hank Green.
The video resource "The Milky Way: Crash Course Astronomy #37" is included …
The video resource "The Milky Way: Crash Course Astronomy #37" is included in the "Astronomy" course from the resources series of "Crash Course". Crash Course is a educational video series from John and Hank Green.
Several times per year, seawater floods some of the streets in Charleston, …
Several times per year, seawater floods some of the streets in Charleston, South Carolina. Taking steps to deal with this "nuisance" flooding can help the city prepare for sea level rise.
Paul Andersen explains how mining is used to extract valuable minerals from …
Paul Andersen explains how mining is used to extract valuable minerals from the Earth's crust. Surface and subsurface mining are used to extract ore which is then processed. A discussion of ecosystem impacts and legislation is also included.
Paul Andersen explains how ray diagrams can be used to determine the …
Paul Andersen explains how ray diagrams can be used to determine the size and location of a reflected image. Ray diagrams for plane, concave, and convex mirrors are included.
Students learn about the advantages and disadvantages of the greenhouse effect. They …
Students learn about the advantages and disadvantages of the greenhouse effect. They construct their own miniature greenhouses and explore how their designs take advantage of heat transfer processes to create controlled environments. They record and graph measurements, comparing the greenhouse indoor and outdoor temperatures over time. Students are also introduced to global issues such as greenhouse gas emissions and their relationship to global warming.
As Public Works Director of Nogales, Arizona, Alejandro Barcenas works to ensure …
As Public Works Director of Nogales, Arizona, Alejandro Barcenas works to ensure a safe and secure water supply for the city’s 20,500 residents. His task isn’t easy: the city is located in an arid region just north of the United States–Mexico border, and its entire supply comes from groundwater.
Half of Nogales’ water comes from alluvial aquifers that are highly responsive to rainfall events. Though this convenient source of water recharges easily, it is also vulnerable to climate-related changes such as reduced precipitation and increased evaporation. The other half of the city’s groundwater comes from a lower-quality source—this water is more expensive to produce. To optimize the use of the two sources of groundwater into the future, Barcenas is contributing to the development of a modeling tool that simulates how the aquifers may change in response to climate.
The video resource "The Modern Revolution: Crash Course Big History #8" is …
The video resource "The Modern Revolution: Crash Course Big History #8" is included in the "Big History" course from the resources series of "Crash Course". Crash Course is a educational video series from John and Hank Green.
In this video Paul Andersen defines and explains the importance of the …
In this video Paul Andersen defines and explains the importance of the mole. The mole is simply a number (like a dozen) used to express the massive number of atoms in matter. It serves as a bridge between the mass of a compound and the number of particles.
In this video Paul Andersen shows you how to write balanced equations …
In this video Paul Andersen shows you how to write balanced equations that describe chemical changes. He then gives you a short introduction to balancing equations and uses the PHET site to practice this skill.
Students are challenged to use computer-aided design (CAD) software to create “complete” …
Students are challenged to use computer-aided design (CAD) software to create “complete” 3D-printed molecule models that take into consideration bond angles and lone-pair positioning. To begin, they explore two interactive digital simulations: “build a molecule” and “molecule shapes.” This aids them in comparing and contrasting existing molecular modeling approaches—ball-and-stick, space-filling, and valence shell electron pair repulsion (VSEPR)—so as to understand their benefits and limitations. In order to complete a worksheet that requires them to draw Lewis dot structures, they determine the characteristics and geometries (valence electrons, polar bonds, shape type, bond angles and overall polarity) of 12 molecules. They also use molecular model kits. These explorations and exercises prepare them to design and 3D print their own models to most accurately depict molecules. Pre/Post quizzes, a step-by-step Blender 3D software tutorial handout and a worksheet are provided.
In this video Paul Andersen describes the structure and explains the properties …
In this video Paul Andersen describes the structure and explains the properties of molecular solids. High intramolecular forces hold electrons and reduce conductivity, whereas low intermolecular forces decrease the melting point. Important polymers can be formed from monomers and have both commercial and biological value.
In this video Paul Andersen explains how elements and molecules are made …
In this video Paul Andersen explains how elements and molecules are made of atoms. In a pure sample of a pure substance the average mass remains the same. If more than one atom is found in a molecule the ration of average masses remains the same.
Students work as engineers to learn about the properties of molecules and …
Students work as engineers to learn about the properties of molecules and how they move in 3D space through the use of LEGO MINDSTORMS(TM) NXT robotics. They design and build molecular models and use different robotic sensors to control the movement of the molecular simulations. Students learn about the size of atoms, Newman projections, and the relationship of energy and strain on atoms. This unique modular modeling activity is especially helpful in providing students with a spatial and tactile understanding of how molecules behave.
Molybdenum is element number 42 and it plays a crucial role in …
Molybdenum is element number 42 and it plays a crucial role in biology. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.
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