Forced Perspective

Description:  Use the following video from Quirkology to start a unit on Earth's location in space. Freeze the video 7 seconds in and ask the students to rank the following objects from tallest to shortest: painting, man, ball, cup 1, cup 2, and chair.  Then watch the remainder of the video. This can be used to establish the relationship between apparent size and actual size of objects. For example, the moon appears larger than Mars in the sky because it is closer to the Earth.

Web Resource: Forced Perspective - Wikipedia