Blog

A random variable, X, follows a discrete uniform distribution, with a = 4 and b = 10. What is the average value for X ?

Scientists have used different methods to construct solar system models. Which of these qualities did the scientists most likely use while constructing the models? (2 points)

You are conducting a study on the relationship between hours spent playing Halo and GPA. You’ve found that as the number of hours spent playing Halo increases, GPA decreases.  What type of correlation does this describe?

Which list places the layers of the sun in the correct order from innermost to outermost? (2 points)

The graph below shows the number of sunspots observed between 1750 and 2000. Based on the graph, which of these periods most likely witnessed the greatest increase in solar radiation? (2 points)

Galileo and Newton both studied the night sky. Galileo studied Jupiter and its moons. Newton studied the gravitational force that held the planets in orbit. Which of these statements best explains why the two scientists proposed different theories about the solar system? (2 points)

In the following image, what conclusion can you draw about the speed of the planet at location A compared to location B? (2 points)

In the history of astronomy, which of the following is true? (2 points)

Saturn is 9.54 AU from the sun. What is its distance from the sun in kilometers? (2 points)

Which of these words best describes the scientific explanations for the formation of solar system? (2 points)