1. Alfred Wegener hypothesized that all of the continents on Earth move. According to his Idea all seven continents A:are always moving away from each other and have never been together. b:were once joined together.

c:will eventually fall off of the Earth.

d:are being pushed upward from heat within Earth's crust.

explanation:

idk

the correct answer is sex-linked recessive.

i just took the test

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.