Science Units (4th Grade)

Interactive Vocabulary:

This site requires Shockwave but allows you
access to download free. Great views of the solar system
working as a system (a group of objects that interact).
UPDATE: This site does not come up anymore as it used to.
Try these instead:
Check out how the Space Station will look when it's all
put together. Notice many systems joined together to make
the Space Station. Rather cool!
These sites show great photographs of glaciers and how they have changed the land.
This is the article on glaciers from wikipedia. I really like the pictures from this site. Be sure to "click" on the images to enlarge the pictures.
Read about glaciers in Alaska. Be sure to "click" on the diagram. You'll notice some familiar vocabulary.
The "before" and "after" pictures are very interesting to compare and contrast. Please note that all of these photographs are copyrighted and not in the public domain.
Check out some awesome land formations from Utah in 360 degree spherical panoramic splendor! Totally breathtaking!

Click "Evaporation" and see if you can create two situations and guess which room's water will evaporate first. I found it a little tricky at first, but I LOVED the sound effects.
Sit back and enjoy some excellent views of our beautiful planet Earth.
This is a great site from NOVA that helps explain photosynthesis, a major process in most ecosystems. Click on "Go to Illuminating Photosynthesis." Click the window. Then you have three choices from the menu at the top of the window. If you choose "The Cycle," click each item to seee how they affect each other. If you choose "Atomic Shuffle," then click NEXT to see the process of photosynthesis in chemical terms. When you choose "Three Puzzlers," you can test your knowledge of photosynthesis.
This site shows you how owl pellets are formed and what we can find inside. For those who don't like to dissect, this virtual dissection is for you!
This site takes you down into the deep ocean floor where ecosystems thrive without the sun and photosynthesis. Instead, these ecosystems rely on chemosynthesis. How cool!

]]Check out the many different ecosystems, or biomes, of our beautiful blue planet!
This is a quick reference site for defining producers, consumers, and decomposers.
This is another quick reference site for defining producers, consumers, and decomposers.
Play the Producers Consumers Decomposers Game.


A bit wordy at the top, but worth reading to learn the vocabulary. Once you get the vocabulary, then the charts at the bottom show you what they mean during an experiment.
Click on "Blasto The Subhuman Canonball". Fun to practice changing variables to hit a target.
Everything you need to know about pendulums and how they prove that the earth is rotating.
Change variables on a pendulum to change its swing.
Quick review of the definitions of "independent" and "dependent" variables.

This site quickly defines each simple machine and offers links for learning more.
This site has fun mini-games to play to practice finding simple machines. Fun!
Click "Build a Rube Goldberg Machine." Pay attention to the directions. First change the rod, then the ramp, then the catapult (lever), and then the pulley. When I hit "reset", everything resets and returns to my last adjustments except the pulley, which you have to reload each time. This was a little hard at first, but once I got the gist of how it all worked together, it was fun to get the clown to dance.

]]This site gives great explanations and examples of simple machines. Sponsored by Scholastic.[[|[[]]
This is a great website to explore mechanical advantage. Some fun simulations to try out.

]]This site explains gears and offers a ton of diagrams.

[[]]This site gives simple definitions and good pictures to illustrate the simple machines.]]
Here's a site that lists a plethera of simple machine websites.
Test your knowledge of finding simple machines in compound machines.


Find out the most up-to-date weather forecast. Just type in your city and state a click "go."
or you can go to...

Learn about temperature, including wind chill and the heat index.

Try your hand at a weather game sponsored by NASA. You can play by yourself or against as many as 3 other people.

Good site to learn about tornadoes, lightning, and storms.
GREAT lightning footage!

Click "start" and make weather! Move the gages to create the weather.

Use Science process skills to analyze, observe, track the weather.

Brainpop requires a subscription, but some of its videos are free to view, like this one. Check out the animations. Well done.
A plethera of weather related activities.