from the back cover: Read and discover more about the world! This series of non-fiction readers provides interesting and educational content, with activities and project work.
Find out more about the design and technology of some of the most widely used mechanisms, such as pulleys, gears and wedges. Detailed diagrams and simple experiments give you an in depth understanding of the basic principles behind each mechanism. Have fun using mechanisms to make four different machines for yourself, including a well, a spring balance and a toy van by followinig illustrated st…
Scissors are commonly found on school supplies lists, but most students don't recognize them for the simple machines they are. This exploration of school buildings and grounds encourages critical thinking to uncover the simple machines that are often taken for granted and teaches basic physical science concepts in a fun way.
Humans have used weapons to fight their enemies since the dawn of history. Todays military arsenal is filled with the most accurate and sophisticated tools yet. Read all about these high tech weapons and the science that went into their development.
Describes how is petrol made.