Apendulum and a block hanging at the end of a spring are both carefully adjusted to make one vibration per second while on the earth's surface. will the period of vibration of the pendulum or of the block on a spring be affected if they are moved to the moon?

For  the pendulum , yes and for the spring ,No

Explanation:

We will examine the two cases,

For pendulum;

we see that for a pendulum, the period depends on the gravitational acceleration of the region it is. so the period for earth will differ compared to that of the moon.

For a spring;

form the equation above is obvious that the period of a spring in vibration is independent of gravitational acceleration of the region it is.

when it gains or loses electrons

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods