This easy worksheet helps first graders sort living things into groups by tracing six science words: mammal, bird, fish, insect, scale, and fur. After tracing, children fill in four blanks naming a dog as a mammal, a robin as a bird, fish living in water, and insects having six legs. Three true or false questions about cats being mammals, fish having fur, and birds having feathers close the page, giving young learners a gentle first look at the body parts that mark each animal group.