Simplify the following text for a Grade 8 native English-speaking person.
Original: A variant of the SchrÃ dinger 's Cat experiment , known as the quantum suicide machine , has been proposed by cosmologist Max Tegmark . It examines the SchrÃ dinger 's Cat experiment from the point of view of the cat , and argues that by using this approach , one may be able to distinguish between the Copenhagen interpretation and many-worlds .
Simplified: SchrÃ dinger 's cat is a thought experiment about quantum physics .