Well matter is basically any substance that has mass and takes up space. Example, you have a ball, or a table, or anything really. That is mass. But anything that doesn't take up space or has mass isn't matter. So, anything that doesn't have a mass or take up space is not matter. Hope this helped you understand. :D
<span>By filtering the air so that the lungs so the lungs don't get infected</span>
The eye doctor is the most recent developments in using lasers for surgical eye procedure
Contour: Gives the bird its stream line shape.
<span>Down feathers: Keeps the bird warm.</span>
