Chemistry is the branch of science concerned with the properties, composition, and structure of matter.
Someone's bookbag was left in the cafeteria. (I hope you found the owner!)
Because there is a lot of weight in it.
really heavy :(
Bookbag Haversack
chemistry
You can bring a small bag.
Matter c:
Chemistry
all kinds of colors
La mochila -Bookbag or bag
Someone's