Classification of vertebrates & invertebrates quiz, science quiz for kids, 1st, 2nd & 3rd Grades. Vertebrates are animals that have a backbone e.g. lion, cat, dog, shark etc while invertebrates do not have a backbone e.g. butterfly, worms, etc. In this science quiz, students are expected to look at a picture of an animal and classify it as either having or not having a backbone. The quiz is interactive and always online. It will aid in homeschooling kids while teachers can use it to supplement their regular course. Begin practicing by clicking on the start button.