2. The picture shows the moon between Earth and the sun. Why are Earth and the moon not always in this position?
A. because the sun is always moving
B. because the moon travels around the sun
C. because Earth travels around the sun
D. because the tilt of Earth changes

The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is call

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.

What type of matter is made of only one kind of atom