Frank was supposed to push three wheelbarrows back to the barn, and he wasn't relishing the idea of three trips. Then in a flash he reorganized the problem. He loaded two wheelbarrows onto the third and made one trip. In doing this, he demonstrated .

As our current atmosphere formed, the concentrations of various atmospheric gases fluctuated. match each gas with the explanation that best describes how its proportion changed during the evolution of the atmosphere.

Below is a description of a resource that you're considering using for a research paper. as you read the description, keep in mind what you've learned about historical thinking skills and use those skills in evaluating whether or not to use the source.

This is a government controlled by one person with absolute power. question 3 options: communist democratic autocratic parliamentary