1. My first physical change is the haircut I got on sunday, I observed half of my head being shaved off with a razor. The reason I categorised this as a physical change because it is reversible and it only affects the length,shape, and look of my hair.
2. My second physical change is me ripping and throwing away a piece of scrap paper. I obsereved the paper being ripped then crumbled together and thrown away. I categorise this as a physical change because I could easily glue it back together, and also that it only affected the shape and size of the paper.
3. My third and last physical change is me drawing a picture on a piece of paper. I observed myself drawing a car with a black pen on the paper. The reason I categorised this as a physical change is because I only changed the appearance of the paper.
4. My first chemical change is when I digested my food. I observed this because I know that after you eat your body goes through a chemical change and changes the food into something else.I categorised this as a chemical change because two substances, my food and the chemicals inside my body interacted to make something else.
5. My second chemical change is when I used soap to clean my hands. What I observed was the soap cleaning my hands through chemical reactions. I categorised this as a chemical change because two substances mixed together to take-away the oil form my hands.
6. My third and last chemical change is when my mom cooked some chicken and the raw pinkish chicken turned into oily, tasty brown chicken. I categorised this as a chemical change because the different spices oil and heat changed the raw chicken into edible chicken.
No comments:
Post a Comment