Does the core makes up about 1/3 of Earth’s total mass?

The intervention of extraterrestrials has been used to explain the bermuda triangle, a region of the atlantic ocean where ships and planes are frequently lost, leaving no evidence behind. how would this explanation best be characterized?

The pressurized plants and fungi mentioned in the video have some surprising similarities. what differences would you expect them to have?

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.