It is your choice if you want your child to read the books on the curriculum guide independently or if you want to read them to her. If your child is a good reader she should have no problem reading the books. The books listed on the curriculum guide are only suggestions and it is not an exhaustive list so feel free to follow your daughter's interests.
Reading and narrating good living books alongside nature study is enough to cover science for this age. This is the age of discovery that will be built on in later years. As Charlotte Mason said, "there is no part of a child's education more important than that he should lay, by his own observation, a wide basis of facts towards scientific knowledge in the future. He must live hours daily in the open air, and, as far as possible, in the country; must look and touch and listen; must be quick to note, consciously, every peculiarity of habit or structure, in beast, bird, or insect; the manner of growth and fructification of every plant." (Vol. 1, p. 264) And again, "Of Natural Science, too, we have to learn that the way into the secrets of nature is not through the barbed wire entanglements of science as she is taught but through field work or other immediate channel, illustrated and illuminated by books of literary value." (Vol. 6, p. 256)
