Aparticle called the pi-meson is made from an up quark and an antidown quark. what is the charge of this particle?

Positive Pion, Negative Pion and Neutral Pion

Explanation:  

Pi-meson or also known as pion is one of any of the three (3) subatomic particles which characterizes of being unstable of its nature. The charged pions  

π+

and  

π−

decay with a mean lifetime of 26.033 nanoseconds or 2.6033×10−8 seconds, and the neutral pion  

π0

decays with a mean lifetime of 84 attoseconds (8.4×10−17 seconds).

wow this is so hard for me im only in elementry school still!

heat from the core of the earth causes convection currents to occur in the mantle. these currents slowly move the crust around.