My mom acts sooo dum..?

Okay, i told her i just video chatted with my best friend who is studying abroad in Australia. I am in New York, and its night time here and getting cold. In Australia, its morning there right now and its getting hot! As i finished videochatting with my Bestie. I go back to tell my mom the irony of the weater and the time difference between new york and australia. My mom claims she does not believe that its getting hot there. She claims that the weather is almost the same everywhere around the world or watever her little brain thinks. After trying to prove to her she still does not believe me, see she has this thing where if she's wrong or she doesn't know something. Instead of prepare to intake this stuff as new information to learn she'll ume things or swear to things becuz of what she thinks she knows. She'll argue like she's right and sometimes she's wrong... Tonight she was so ertive about the fact that its getting cold in australia & when i proved to her that it wasn't by going online and searching the weather i was right all along. So when i told her, she's like "oh whatever, i still don't believe it... tell your friend enjoy her summer" all sarcastic and mean... Like i started off telling her i talked to my friend, and it ended in this huge argument over this, and she claims im arguing! LIKE WTFFFFF...SERIOUSLY, I CAN'T STAND HER WHEN SHE IS LIKE THIS.... what do u think?