When things turn like a top they

Earth turns around an imaginary line called

The path that one object takes around another object is called

A group of stars tha seems to form a pattern in the night sky is called

One kind of modern calendar is solar calendar. What is a solar calendar based on

A fourth grader in Florida is an experiment in her science class. At the same time, fourth grader in China is getting good nights sleep. What is responsible for being daytime in Florida whil in China nighttime in China?

One day on earth is 24 hours. Other planets have longer days. What determines the length of a planets day?

A modern earth solar calendar year has 365 days divided into 12 months. Each month is about 30 days. On an imaginary moon of planet X a month is three days shorter than earth month. About how many Planet X lunar

momths will fitcinto earth calendar?

Technology developed for us in space can help us in other ways. Which type of earth technology on earth is a spin-off of technology originally developed for space exploration?