what I learned this week

Hi Tyler here this week I learned that there are more invertebrates then vertebrates in the world. Vertebrates are things with backbones and invertebrates are things that don't have backbones. I also learned about spiny-bodied animals. Spiny-bodied animal are starfish,sand dollars,sea lilies, and sea urchins are spiny-bodied animals and they are also invertebrates. I also learned about irregular nouns. Irregular nouns never change like fish,sheep,shrimp, and moose.So when you put fish,sheep,shrimp, and moose. That's all for now bye.