http://www.factmonster.com/spot/riteofspring1.html

http://www.classzone.com/books/earth_science/terc/content/investigations/es2603/es2603page05.cfm

http://www.usoe.k12.ut.us/curr/science/core/6th/SCIBER6/SEASONS/HTML/INTRO.HTM

National Geographic CritterCam
http://www.nationalgeographic.com/
channel/crittercam/video_previews.html

North Pole Cam
http://www.arctic.noaa.gov/gallery_np.html

PandaCam
http://www.camzone.com/page/zoo.html

PenguinCam
http://www.mbayaq.org/efc/efc_se/ se_sz_cam.asp

SharkCam
http://www.camvista.com/england/london/sharks.php3

Deformed FrogsCam
http://freddo.pca.state.mn.us/frogcam2.html

SunCam
http://dsc.discovery.com/cams/sun.html

InsectZoo
http://zoocam.ent.iastate.edu/

African Watering Hole Cam
http://www.zulucam.org/

NASA TV
http://www.unitedspacealliance.com/ live/NASATV.htm

Bad Science
http://www.ems.psu.edu/~fraser/BadScience.html

Junk Science
http://www.junkscience.com/

Fun Science Gallery
http://www.funsci.com/

BrainPop!
http://www.brainpop.com/

Funology - The Science of Having Fun!
http://www.funology.com/

The Yuckiest Site on the Internet
http://www.yucky.com/

Sandlot Science
http://www.sandlotscience.com/

Inventive Kids
http://www.inventivekids.com/

Kinetic City
http://www.kineticcity.com/

The Science Explorer
http://www.exploratorium.edu/science_explorer/

Science Fun With Airplanes
http://www.ag.ohiostate.edu/%7Eflight/homepage.html

Pfizer Fun Zone
http://www.pfizerfunzone.com/

Cool Science for Curious Kids
http://www.hhmi.org/coolscience/

FunBrain
http://www.funbrain.com/

How Stuff Works
http://www.howstuffworks.com/

ScienceMaster
http://www.monkeytime.com/sciencemaster/
galleries/galleries.php

EurekaScience; I Can Do That!
http://www.eurekascience.com/ICanDoThat/

Exploratorium Science Snacks
http://www.exploratorium.edu/snacks/
snackintro.html#science

Home Experiments
http://scifun.chem.wisc.edu
/HOMEEXPTS/HOMEEXPTS.html

Sport Science 
http://www.exploratorium.edu/sports/index.html

Extreme Science
http://www.extremescience.com/index.htm

Fun Science Activities to do at Home
http://www.learner.org/catalog/resources/
activities/content/sact01.html

Astronomy Picture of the Day
http://antwrp.gsfc.nasa.gov/apod/astropix.html

Earth Science Picture of the Day
http://epod.usra.edu/index.php3

National Geographic Picture of the Day
http://lava.nationalgeographic.com/ cgi-bin/pod/PhotoOfTheDay.cgi

Weather Picture of the Day
http://www.weatherpictureoftheday.com/

Powers of 10
http://micro.magnet.fsu.edu/ primer/java/scienceopticsu/powersof10/

More Powers of 10
http://www.powersof10.com/

Devices of Wonder
http://www.getty.edu/art/exhibitions/devices/flash/

http://school.discovery.com/sciencefaircentral/scifairstudio/handbook/scientificmethod.html

http://www.gckschools.com/schools/bsic/geny/sciencefairproject/scientificmethod/

http://scene.asu.edu/habitat/s_method.html

http://sunshine.chpc.utah.edu/labs/scientific_method/sci_method_main.html

Properties of Matter

Chem4Kids Float or Sink

http://host.explorelearning.com/ESClassic/density.htm

http://chem4kids.com/files/matter_intro.html

Kidzone
http://www.kidzone.ws/water/

EPA
http://www.epa.gov/
OGWDW/kids/cycle.html

The Water Cycle
http://mbgnet.mobot.org/fresh/cycle/

The Water Cycle Grabber 2
http://www-k12.atmos.washington.edu/
k12/pilot/water_cycle/grabber2.html

Enchanted Learning
http://www.enchantedlearning.com/
subjects/ astronomy/planets/
earth/Watercycle.shtml

Droplet and the Water Cycle
http://kids.earth.nasa.gov/droplet.html

Animated Water Cycle
http://parkview.digitalbrain.com/
digitalbrain/web/elearning/secdemolearning/
Geography/Exemplar%20Flash%20-%
20The%20Water%20Cycle/

Water Science
http://ga.water.usgs.gov/
edu/watercycle.html

Cycles
http://www.cotf.edu/ete/modules/
msese/ earthsysflr/water.html

Weatherwatch
http://www.educ.uvic.ca/faculty*
/ mroth/438/WEATHER/watercycle.html

http://marsrovers.jpl.nasa.gov/home/index.html

http://hubblesite.org/

http://edspace.nasa.gov/features/spaceday/index.html

http://www.kidport.com/RefLib/Science/SpaceShuttle/SpaceShuttle.htm

http://www.solarviews.com/eng/history.htm

http://www.astrodigital.org/space/

http://www.seasky.org/sky5.html

Moon Sites

http://www.sciencenetlinks.com/interactives/moon/moon_challenge/moon_challenge.html

http://www.fearofphysics.com/SunMoon/phases.html

http://aa.usno.navy.mil/data/docs/MoonPhase.html

http://www.astro.wisc.edu/%7Edolan/java/MoonPhase.html

http://stardate.org/nightsky/moon/

http://www.solarviews.com/eng/edu/moonphas.htm

http://tycho.usno.navy.mil/vphase.html

http://www.moon-phases.com/

http://www.ac.wwu.edu/%7Estephan/phases.html

http://www.enchantedlearning.com/subjects/astronomy/moon/Phases.shtml

http://www.usoe.k12.ut.us/curr/science/core/6th/SCIBER6/MOON/HTML/INTRO.HTM

General Space Information

Something Amazing Everyday
http://www.space.com/

Kids' Space
http://www.kids-space.org/

Standard Deviants Astronomy
http://standarddeviants.school.aol.com/
pls/brain/goldhil.show_subject?p_subject_id=35

Amazing Space
http://amazing-space.stsci.edu/

NASA
http://www.nasa.gov/
externalflash/ m2k4/index1.html

SpaceKids
http://www.spacekids.com/

Space Sense
http://www.windows.ucar.edu/
tour/link=/games/
space_sense_intro.html&edu=elem

Astronomy - Our Place in Space
http://www.ology.amnh.org/
astronomy/index.htm

WorldBiomes.com
http://www.worldbiomes.com/

Biomes of the World
http://mbgnet.mobot.org/

Blue Planet Biomes
http://www.blueplanetbiomes.org/
world_biomes.htm

The World's Biomes
http://www.ucmp.berkeley.edu/
glossary/gloss5/biome/

A Walk in the Woods
http://www.urbanext.uiuc.edu/
woods/index.html

Creature World
http://www.pbs.org/
kratts/world/content.html

Energy Transfer in Ecosystems

The Food Chain
http://www.kidport.com/
RefLib/Science/FoodChain/FoodChain.htm

Who Eats Whom or What?
http://www.kidport.com/RefLib/
Science/WhoEatsWhat/WhoEatsWhat.htm