Tuesday, October 25, 2011

23 Degree Tilt

Today in science we learned why the seasons change!

The seasons are caused as the Earth, tilted on its axis, travels in a loop around the Sun each year. Summer happens in the hemisphere tilted towards the Sun, and winter happens in the hemisphere tilted away from the Sun. As the Earth travels around the Sun, the hemisphere that is tilted towards or away from the Sun changes.
The hemisphere that is tilted towards the Sun is warmer because sunlight travels more directly to the Earth’s surface so less gets scattered in the atmosphere. That means that when it is summer in the Northern Hemisphere, it is winter in the Southern Hemisphere. The hemisphere tilted towards the Sun has longer days and shorter nights. That’s why days are longer during the summer than during the winter.

In math we learned how to use arrays to solve division problems. Like our tens and ones cubes that we used yesterday, we can create arrays to find out how many of something goes in a group.
 We practiced independently in our journals.

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