A scar is a mark on your skin that shows where it has healed after it was damaged. Scar tissue can also form inside you if you have an internal injury. The man in the picture has a scar from donating a kidney.
You scare someone when you make them scared or frightened.
The man in the picture is trying to scare his cat.
A scarecrow is a human-shaped device that people put near crops to scare off birds. The idea is that the birds think the scarecrow is a real person and will stay away from it.
You scatter something if you spread them around at roughly even spacing but with no real order. People often scatter seeds to feed birds. The acorns in the picture are scattered all over the ground.
Schnauzers are dogs from Germany with a distinctive hairy moustache - 'schnauzer' is the German word for moustache. They are usually a salt-and-pepper colour, with white and black hairs mixed together. They were originally bred as a rat catcher and guard dog, but there are now three different size breeds - large, standard and miniature. They are friendly, loving dogs and are good with children. They are protective and make excellent guard dogs.