Measuring New Science Standards Is Hard. These Projects Aim to Change That

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Measuring New Science Standards Is Hard. These Projects Aim to Change That‘Education Week (blog)

Measuring New Science Standards Is Hard. These Projects Aim to Change That

About 18 states have adopted the Next Generation Science Standards. And although these shared science expecatations have been out for about five years, testing models that fully capture students’ grasp of them have lagged far behind. (So far, only a handful of states have updated their science tests to match.)’

The NGSS poses some big technical challenges for the smarty-pants who develop student tests. For one, the NGSS expects students to learn primarily by interacting with phenomena and recording and analyzing data. That’s basically the inverse of how most of us learned science, in which a teacher explained a new concept and, if we were lucky, illustrated it through a lab.

New tests also needs to match the standards’ crosscutting concepts, such as being able to recognize patterns and understand scale and proportion.’

Naturally, this all begs for some testing innovation, which is expensive and difficult work. Now, the American Association for the Advancement of Science has begun a new project to craft model test items related to the standards’ energy practices.’

The project, funded by a $1.4 million grant from the U.S. Department of Education’s Institute for Education Sciences, will involve the creation of “scenario based” tasks that illustrate the concepts of the transfer and conservation of energy, thermal energy transfer and disseptation, and energy and chemical reactions. Each scenario will require students to interact with a phenomenon, answering both multiple-choice questions’and questions that require students to respond to prompts.’

  • Publisher: Education Week – Curriculum Matters
  • Date: 2018-04-10
  • Author: Stephen Sawchuk
  • Twitter: @educationweek
  • Citation: Web link

Quite a lot has been going on:

Olansi Healthcare Co., Ltd Produces Advanced Range Hydrogen Water Bottle And Jug At Affordable Rates

Guangzhou Olansi Healthcare Co., Ltd is a manufacturer from China that associates itself with the fabrication and supply of air purification,hydrogen water bottle and water treatment systems. All of their products are assured to last and offered at affordable rates.

Environmental degradation is one of the most pressing issues in the modern day world. It is not a recent issue, to begin with as the onset of the industrial revolution marked the beginning of deteriorating conditions of the environment. The puff of black smoke after the first steam engine was turned on created the path for degrading conditions of air. Since then, pollution of groundwater and saturation of air with harmful particulate matter is an ever-lasting issue. With the expansion of industries, city limits were also expanded reducing the green covering of the earth to a bare minimum.

Thanks to modern science and research, nations have joined hands to conceptualize machines and advanced equipment to keep the ill effects of environmental depletion under check. When it comes to manufacturing hydrogen water machine and related equipment, one of one of the leading nations is the Republic of China. Guangzhou Olansi Healthcare Co., Ltd is a manufacturing firm associated with the fabrication and supply of advanced purification systems and treatment installation for both air and water. They have a global presence when it comes to popularity, preference and customer satisfaction. The company is accredited and internationally certified with different industrial standards including CE certification. It is considered to be one of the most technologically advanced and progressive manufacturers.

The manufacturing unit of the company is equipped with advanced robotics and automated machinery that minimizes compromising with product quality. To secure the future of the company they invested a lot of time, money and efforts into putting together a dedicated Research and Development wing within their company grounds. The R&D wing is headed by a team of highly skilled individuals consisting of thinker, engineers, technicians whose job is to conceptualize innovative product ideas. Their latest product, the hydrogen water maker is the brainchild of one such engineer working in the R&D wing. It is an advanced water purification and treatment device that is portable enough to carry anywhere and talented enough to provide pure drinking water.

The hydrogen water generator is another example which enables the company to showcase their capabilities to tackle environmental challenges efficiently. The company is designed and constructed to merge with the surrounding environment without damaging the delicate balances of nature. They makes the use of natural light as much as they can with the aim of reducing their annual carbon footprint.

A New Look at the Hydrogen Economy

The concept of a ‘hydrogen economy’ took a hit in the first years of the new century when hydrogen was touted as the clean transportation fuel of the future. Prolonged failure to deliver on that vision tarnished popular perceptions. The concept didn’t die, but it receded from public attention.

In the past few years, interest has revived. That’s in part because practical fuel cell vehicles may finally have arrived. (I’ve started seeing hydrogen-fueled Toyota Mirais on the roads in the San Francisco Bay area.) But there’s also a lot of interest — notably in Europe — in the use of hydrogen for buffering the irregular energy output of wind and solar PV resources. Hydrogen would be produced by electrolysis when the supply of electricity exceeded demand, and then used to meet demand during shortfalls.

That particular use of hydrogen is controversial, due to the low 40% round-trip efficiency of P2G2P (power to gas to power) when electrolytic H2 is used for energy storage. Advocates don’t dispute the low efficiency, but contend that renewable energy will soon be so cheap that low efficiency won’t matter.

However there’s no avoiding the fact that 2.5 kWh of electricity would need to be generated for every kWh delivered from storage. In a 100% renewable energy economy, a large fraction of energy must be delivered from storage: 50 – 75%, depending on geographical region and on the state of transmission systems and demand side management. That means a rough doubling of the RE capacity that would have to be installed. The average cost of electricity would more than double.

There is an alternative that could be quicker and more economical. That alternative is hydrogen made using the chemical potential energy of fossil fuels, but with no CO2 emissions.

  • logo
  • Publisher: The Energy Collective
  • Date: 2018-04-09T05:00:38+01:00
  • Author: Roger Arnold
  • Citation: Web link

Watching: Hard. These Projects Aim, Generation Science Standards. And, The NGSS

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