Which of these things is true about the moon? a) the moon is always moving around Earth in a circle.

b) the moon is always in the same position in Earths sky.

c) the moon is always moving in many changing patterns around Earth.

d) the moon is always moving back and forth across Earths sky.

Variables,control,conclusion and finally scientific theory

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na