Which period is older than the Triassic period?
Cambrian
Cretaceous
Jurassic
Paleogene
The period that is older than the Triassic period is the Cambrian period. To determine this, you need to have knowledge of the geologic time scale or refer to a reliable source such as a geology textbook or an online resource on Earth's geological history.
The geologic time scale is a system used by scientists to divide Earth's history into different periods and epochs based on significant events and changes in Earth's environment. Each period represents a distinct span of time during which specific types of rocks, fossils, and geologic events occurred.
The Cambrian period occurred approximately 541 million to 485 million years ago, which predates the Triassic period. It is known for the rapid diversification and appearance of many complex animal life forms, including early arthropods, trilobites, and brachiopods.
Therefore, the Cambrian period is older than the Triassic period.