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Struggling to get to school on time, Ayla asks, “is school getting further away?” Ada the science app, taking the question at face value, produces explanations for the expansion of the Universe. From explaining evidence for the expansion of the Universe to discussing red shift, Ada reinforces the idea of the Big Bang theory. Using the idea that the Universe started at one point and continued to move out, Ada can demonstrate how everything in the Universe is moving away from each other, using the red shift of light as evidence.

By using your own pace, show how light can be red shifted by taking larger or smaller steps after watching the animation. Using a slinky, show how the wavelength of waves can be altered between the distance of the source and the receiver. Advanced - Describe how altering the wavelength will alter the frequency. You can use a slinky to understand this, before writing the description. Predict the new wavelength of red shifted light using the equation of the Doppler effect. Use the electromagnetic spectrum to choose the correct type of wave. Use this information to describe the cosmic microwave background.