CLASS 9 · LEARNING KNOWLEDGE

Big Bang model and observational evidence – basic principles

How it works

The Big Bang model describes the origin and development of the universe from an extremely dense and hot initial state about 13.8 billion years ago. Central observational evidence includes the cosmic background radiation, the expansion of the universe (demonstrated by the redshift of distant galaxies), and the abundance of light elements such as hydrogen and helium. These observations support the model, which states that space, time, and matter arose together and that the universe has been expanding and cooling ever since.

Note
The Big Bang model is supported by several independent observations: expansion of the universe (redshift), cosmic background radiation, and element abundances. These pieces of evidence must be understood in relation to the model and distinguished from one another.

An example

Which of the following findings supports the Big Bang model most directly?

The discovery of cosmic background radiation supports the Big Bang model directly, as it is considered a remnant of the hot early phase of the universe. The other answers refer to phenomena that are not directly connected with the Big Bang model.

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50 Exercises · three difficulty levels · selection and number input

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Own explanation and own practice exercises by AmyMath. Subject reference framework: KMK Educational Standards Mathematics ESA/MSA. The topic assignment may vary by federal state.