Thing
Object, Item
noun
The kanji and the word are exactly the same. That means they share meanings as well. Besides thing, it has the related meanings of object and item.
もの
Since this word is made up of a single kanji, it should use the kun'yomi reading, but you haven't learned it yet. Here's a mnemonic to help you:
What game has the most things in it? Monopoly (もの). You can choose from a bunch of random things to play as, you know? And no one actually knows what those things are. What's a thimble anyway? Just call it a thing.
マサルさんが持っている物は何ですか。
What is that thing Masaru has?
うちのワンちゃんを物あつかいしないでください！
Don't treat my dog like a thing!
私の好きな物を三つ挙げるなら、チキンと揚げ物とご飯です。
My three favorite things are chicken, fried foods, and rice.