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NSDL Science Refreshers

NSDL Science Refreshers provide quick and easy access to high-quality science content. These resources from trusted providers are selected and organized by grade level and subject area in order to save you time and effort in finding interactive tutorials, diagrams, articles, and other materials to enhance your content knowledge.

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Atoms Around Us
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Though titled for kids the information presented at this site is thorough and supported with hot links to related concepts as well as illustrations. Click on the blue Next Stop on the Tour button to continue learning.

Subject:
Engineering
Chemistry
Physics
Material Type:
Diagram/Illustration
Provider:
NSDL Staff
Provider Set:
NSDL Science Refreshers
Date Added:
11/06/2009
Black Magic
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Educational Use
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Most non-permanent markers use inks that are made of mixtures of colored pigments and water. How does Black Magic work? Why do some black inks separate into many colors on a wet coffee filter? Why does mixing many colors of ink make black?

Subject:
Engineering
Life Science
Chemistry
Physics
Material Type:
Activity/Lab
Provider:
NSDL Staff
Provider Set:
NSDL Science Refreshers
Date Added:
11/06/2010
Chemical Elements: An Online Interactive Periodic Table
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This is an online interactive periodic table of the elements which includes all elements up to 118. There are several different options for viewing, such as date of discovery, electron configuration, number of neutrons, etc. Elements can also be viewed by element groups. Additional links to further information on a particular element are given in some cases. Citation information is also provided.

Subject:
Engineering
Life Science
Chemistry
Physics
Material Type:
Diagram/Illustration
Provider:
NSDL Staff
Provider Set:
NSDL Science Refreshers
Author:
Yinon Bentor
Date Added:
11/06/2009
Chemical Reactions
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Though titled for kids the information presented at this site is thorough and supported with hot links to related concepts as well as illustrations. Click on the blue Next Stop on the Tour button to continue learning.

Subject:
Chemistry
Physics
Material Type:
Diagram/Illustration
Provider:
NSDL Staff
Provider Set:
NSDL Science Refreshers
Date Added:
11/06/2009
Conductors and Conductivity
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This page from a comprehensive physics site, describes, defines, and illustrates electrical conductivity. Click on Resistance in the right hand navigation bar for similar information regarding conductivity's opposite, resistivity.

Subject:
Chemistry
Physics
Material Type:
Diagram/Illustration
Provider:
NSDL Staff
Provider Set:
NSDL Science Refreshers
Author:
Andrew Rader
Date Added:
11/06/2009
Evolution Lab
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The user can vary the strength of the selection pressure, a predator, pathogen, or pollution for example, which is how change in the environment is simulated. Mutation rates can also be varied. The interaction of these two variables gives rise to adaptations, thus evolution. However, the same two variables also explain extinctions when random mutations produce traits which decrease, rather than increase fitness and/or when environmental change is so severe, a large proportion of a species is killed off in a few generations, not leaving enough individuals to repopulate before other species' outcompete the now rare species.

Subject:
Life Science
Ecology
Forestry and Agriculture
Geoscience
Material Type:
Diagram/Illustration
Interactive
Provider:
NSDL Staff
Provider Set:
NSDL Science Refreshers
Author:
Leif Saul
Date Added:
11/06/2005
Figure This: Time Zones
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Some Rights Reserved
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This is an activity featuring a time zone map useful when teaching an interdisciplinary social studies and math unit focusing on geography and the time zones. It underscores the role of the earth's rotation in everyday life, and the need to understand the relationships between earth rotation, day and night, and time zones around the world.

Subject:
Education
Mathematics
Geoscience
Space Science
Material Type:
Activity/Lab
Provider:
NSDL Staff
Provider Set:
NSDL Science Refreshers
Author:
KnowNet Construction, Inc.
Date Added:
11/06/2004
Freezing and Melting
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This article tells how the freezing point of a substance is also its melting point. The energy of the substance's molecules changes with temperature, thus with changes in state. Also described is how freezing points can be lowered, or depressed, by adding a substance.

Subject:
Chemistry
Physics
Provider:
NSDL Staff
Provider Set:
NSDL Science Refreshers
Date Added:
11/06/2010
Fungi
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Shows a phylogenetic tree of the fungi phyla, followed by information, photos and more links. Click on the hotlinks in the phylogenetic tree for specific examples within the phyla also accompanied by photos.

Subject:
Life Science
Material Type:
Diagram/Illustration
Provider:
NSDL Staff
Provider Set:
NSDL Science Refreshers
Author:
John W. Taylor
Meredith Blackwell
Rytas Vilgalys
Timothy Y. James
Date Added:
11/06/2009
Green Algae
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Color photomicrographs of several species of green algae with brief descriptions of their chief characteristics and habitat. Scroll to the bottom of the page to links to bacteria, and more protists including diatoms, desmids and rotifers.

Subject:
Life Science
Material Type:
Diagram/Illustration
Provider:
NSDL Staff
Provider Set:
NSDL Science Refreshers
Author:
Wim van Egmond
Date Added:
11/06/2010
How Did Structure Form in the Universe?
Unrestricted Use
Public Domain
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This page is all about the formation of the universe and its structure. Several hotlinks are embedded in the discussion for further information. Photographs from the Hubble Space telescope are included.

Subject:
Geoscience
Space Science
Material Type:
Diagram/Illustration
Provider:
NSDL Staff
Provider Set:
NSDL Science Refreshers
Date Added:
01/29/2010
How Fossil Fuels Were Formed
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Some Rights Reserved
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A one page article describing the formation of fossil fuels, enhanced with illustrations. At its end, there are three links to specific fuels: coal, oil and gas for more specific information.

Subject:
Technology
Ecology
Forestry and Agriculture
Geoscience
Physics
Space Science
Material Type:
Reading
Provider:
NSDL Staff
Provider Set:
NSDL Science Refreshers
Date Added:
10/09/2008
How Thermometers Work
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Some Rights Reserved
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This article is divided into pages on bulb thermometers, bimetallic, strip thermometers, and electronic thermometers. Illustrations are included.

Subject:
Mathematics
Chemistry
Physics
Material Type:
Diagram/Illustration
Provider:
NSDL Staff
Provider Set:
NSDL Science Refreshers
Author:
Marshall Brain
Date Added:
11/06/2010
Lamarcksim
Unrestricted Use
CC BY
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Article describing Lamarckism, the erroneous idea that acquired characteristics are heritable, and its history with hot links to natural selection, adaptation, and more.

Subject:
Life Science
Material Type:
Reading
Provider:
NSDL Staff
Provider Set:
NSDL Science Refreshers
Date Added:
02/18/2010