Homework Help

Wed, 03/22/2017 - 9:49am

How does rain happen? Long ago the Ashanti people believed that Anansi, the Spider, brought the rains that would put out fires in the jungle. In old Britain, the legendary Green Man was supposed to have rainmaking powers, and Zeus brought the rains for the ancient Greeks.

Today, we know that when warm, wet air rises into the sky and cools off, its water condenses out of the clouds as rain. Rain and snow can also happen when a batch of warm air meets a batch of cool air. The two kinds of air usually do not mix. The warm air is less dense than the cool air and will slide right over it. As the warm air goes higher, it cools off, and the moisture separates or condenses out of the cooled air and falls as a slow, steady rain.

Tue, 03/07/2017 - 9:42am

Boom!
One morning, the old wooden dam on the Rappahannock River went up in clouds of smoke. It was a huge thing—ancient and strong, built in layers to tame the river so that the power of the water pushing against it could provide electricity for the town. But it had been years since anyone tapped that power. Now, the dam was falling apart, and it was decided that it had become dangerous. So the Army Corps of Engineers blew it up one morning, and the river was flowing freely again—just as it had in previous centuries. By getting rid of the dam, the river had a chance to go back to being more like it once was. There would be more fish which would mean more birds, and, really more of everything.

Wed, 03/01/2017 - 9:12am

Our rivers, lakes, and beaches are beautiful, but are they safe? Every day, the toxic runoff from parking lots, busy roads and quiet subdivisions makes its way into our streams and oceans. Even the oil burning off from cars on the roads gets washed into the groundwater and streams by way of the storm drain every time it rains.

The more houses we build, the more pollution we will add to our environment. Every time we lay down a new parking lot or piece of roadway, there is an impact on our environment.

Wed, 02/01/2017 - 11:36am

Our 16th president was a very odd-looking man. Long-limbed and raw-boned, this frontier president grew up without a lot of the niceties we take for granted today. He grew up surrounded by wilderness and not having much schooling. As he remembered it, "...I could read, write, and cipher (simple math) ... but that was all."

Tue, 01/31/2017 - 12:52pm

It's true: most people would do just about anything to get out of having to speak in public, whether it's the standard "everyone in this class will give an oral report" situation or an acceptance speech for some nifty award you've just received. The knees knock, the heart pounds, and the words you've practiced and practiced and practiced fly right out of your mind. You find yourself resorting to reading from the index cards with your eyes down, your voice a droning monotone, and the sweat beading on your forehead. Yuck. Not a good situation. It's painful for you as the presenter and even more painful for your audience to watch. Here's a bit of advice for beginning public speakers.

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