Vine

"A hands-on approach introduces young scientists to pulleys. Science theory and practical, fun projects teach the physics and the technology behind this simple machine. Important science curriculum is explained through historical and contemporary examples of pulleys. Step-by-step projects range from the simple to the more challenging."--

The mystery of UFOs has puzzled people for years. Have we really been visited by aliens from outer space? If so, why don't we have more evidence? Can we get to the bottom of this mystery using science and logic, or will it continue to mystify us forever? Discover all of the theories, from the reasonable to the ridiculous, then decide for yourself what to believe. Learn how scientists analyze and explain fakes and hoaxes. This book includes eyewitness accounts, dramatic photographs, up-to-date information, a glossary, further resources, and web search tips.

The mystery of UFOs has puzzled people for years. Have we really been visited by aliens from outer space? If so, why don't we have more evidence? Can we get to the bottom of this mystery using science and logic, or will it continue to mystify us forever? Discover all of the theories, from the reasonable to the ridiculous, then decide for yourself what to believe. Learn how scientists analyze and explain fakes and hoaxes. This book includes eyewitness accounts, dramatic photographs, up-to-date information, a glossary, further resources, and web search tips.

The mystery of UFOs has puzzled people for years. Have we really been visited by aliens from outer space? If so, why don't we have more evidence? Can we get to the bottom of this mystery using science and logic, or will it continue to mystify us forever? Discover all of the theories, from the reasonable to the ridiculous, then decide for yourself what to believe. Learn how scientists analyze and explain fakes and hoaxes. This book includes eyewitness accounts, dramatic photographs, up-to-date information, a glossary, further resources, and web search tips.

Looks at the science behind houses, looking at the material that makes them and their physical structure, as well as how they are provided with heat, electricity, water, and waste water removal.

Looks at the science behind houses, looking at the material that makes them and their physical structure, as well as how they are provided with heat, electricity, water, and waste water removal.

Looks at the science behind houses, looking at the material that makes them and their physical structure, as well as how they are provided with heat, electricity, water, and waste water removal.

Looks at the science behind houses, looking at the material that makes them and their physical structure, as well as how they are provided with heat, electricity, water, and waste water removal.

"Read Volcanoes to learn all about these exciting, beautiful, and unique landforms. Discover the different volcano types, how volcanoes are formed, and what living things can be found in and around volcanoes."

"Read Volcanoes to learn all about these exciting, beautiful, and unique landforms. Discover the different volcano types, how volcanoes are formed, and what living things can be found in and around volcanoes."

"Read Volcanoes to learn all about these exciting, beautiful, and unique landforms. Discover the different volcano types, how volcanoes are formed, and what living things can be found in and around volcanoes."

"Read Volcanoes to learn all about these exciting, beautiful, and unique landforms. Discover the different volcano types, how volcanoes are formed, and what living things can be found in and around volcanoes."

Do you know that 200 years ago, the only way that one person could send a message to another person was by letter or messenger? It's hard to imagine now, with our smartphones and computers at our fingertips. From the invention of the telegraph in the 1830s all the way through to the wearable technology of the present day, this book charts the incredible history of telecommunications.

Do you know that 200 years ago, the only way that one person could send a message to another person was by letter or messenger? It's hard to imagine now, with our smartphones and computers at our fingertips. From the invention of the telegraph in the 1830s all the way through to the wearable technology of the present day, this book charts the incredible history of telecommunications.

Do you know that 200 years ago, the only way that one person could send a message to another person was by letter or messenger? It's hard to imagine now, with our smartphones and computers at our fingertips. From the invention of the telegraph in the 1830s all the way through to the wearable technology of the present day, this book charts the incredible history of telecommunications.

"What happens when we cool a liquid? What is temperature? What causes condensation? Read 'Cooling' to learn about the different ways we can cool materials and how materials can change as they cool. Find out about the freezing points of different materials, how we can reduce the temperature of materials, and what we can do to prevent cooling."

"What happens when we cool a liquid? What is temperature? What causes condensation? Read 'Cooling' to learn about the different ways we can cool materials and how materials can change as they cool. Find out about the freezing points of different materials, how we can reduce the temperature of materials, and what we can do to prevent cooling."

"What happens when we cool a liquid? What is temperature? What causes condensation? Read 'Cooling' to learn about the different ways we can cool materials and how materials can change as they cool. Find out about the freezing points of different materials, how we can reduce the temperature of materials, and what we can do to prevent cooling."