Education Elementary school science that makes sense

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

Education
A book that answers questions about elementary school science in a quiz format, such as "Why is the water in the river not running out?". You can understand the reasons for things, so you don't have to do unnecessary rote memorization. A deeper understanding from the basics. An essential learning method that is also useful for junior high school entrance exams.