Teacher/Student Version Disappearing Arctic Sea Ice How do we know that Arctic Sea Ice is slowly melting?
August or early September. From year to year the ice level fluctuates, sometime it increases and sometimes it decreases. The key to interpreting the data set is to look at many points over a long period of time to determine the trend
Our Universe 04: Origin and Expansion of the Universe
Note: Read all the instructions for this lab before you begin working! Pre-reading the procedure will give you a mental picture of what you will be doing and a better understanding the process
A tale of Four Cities: Using Data to Model Variations in Regional Climate in the Western United States – Middle School Sample Classroom Task
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civil rights movement