I'm here to tell you the story of a robot named Carl. He came from a far away land known as Factory. Carl was sad because he was missing a part called a tire. He also needed a sun gatherer. But, the tire was more important. Once Carl got all these parts he could travel to his new home in the nation of Lab and the city of Office. It was a tricky thing to get there with missing parts. Just as he had given up hope Carl got a message from Mr. X saying the new parts were ready to be delivered. This made the robot very happy. The parts arrived a few days later and Carl put them in with 2 days of work. After this Carl began to travel the last bit of his goal to get to his new job. After this Carl took 10 days to get to Lab.

Which parts is Carl the robot missing?

Mike and Jeff are close friends. Their school is having a guessing game to guess how many gumballs are in a box. If they get the right amount they win $100. If they get close they get a $20 gift card. The box looks like it is missing some gumballs. It turns out some people are eating them when they place their guess. 100 people guessed and took a piece of candy. The box is 10" by 10" by 10". Each gumball is 1" each. Mike guessed 500. Jeff guessed 800. They both said they would split their money they win, if they win.

How might someone make an educated guess as to how many gumballs are in the box?

How can you describe your location? You might use a familiar system. You might say, 'I live at 1234 Main Street, Springfield, Ohio.' You could also say, 'I live right behind the Elementary School.' This method uses the school as a point of reference. Another example is, I am at the corner of Maple Street and Main Street. Both streets may be a good reference for anyone living in your town. Scientists must be able to pinpoint a feature they are studying. Scientists use a special system to describe locations. They use latitude and longitude as a reference. Lines of latitude and longitude form a grid. You may have used a grid system while doing graphing. This grid is centered on a reference point. Zero latitude is the equator. Lines of latitude run east to west. They divide the Earth from North to South. Lines of longitude run from north to south. They divide the Earth from East to West. Zero longitude runs through Greenwich, England. You may have heard the term, Greenwich Mean Time, or GMT. The system of latitude and longitude works well for objects that do not move.
Would a line of latitude that runs through Greenwich, England, divide the Earth from north to south or from east to west?