​We can control forces and movement by creating simple machines to perform specific functions. Today we will build a crane to lift and knock over objects. Cranes are a type of mechanical system because they use simple machines to move objects. The crane we are building today uses pulleys to move objects up and down, and an axle to pivot from side to side. Cranes involve a number of different forces to perform different tasks. To lift the crane, we will crank the knobs which winds up the crane's cables using the input force of pulling. This will produce an output force of the crane lifting. The crane will also pivot and use a magnet. 

Curriculum Expectations:
Grade 3: Science and Technology

• A1. STEM Investigation and Communication Skills
  use a scientific research process, a scientific experimentation process, and an engineering design process to conduct investigations, following appropriate health and safety proceduresA1
  
• D2. Exploring and Understanding Concepts
  demonstrate an understanding of the basic principles and functions of machines and their mechanisms 

Grade 4: Science and Technology

• A1. STEM Investigation and Communication Skills
  use a scientific research process, a scientific experimentation process, and an engineering design process to conduct investigations, following appropriate health and safety procedures
• D1. Relating Science and Technology to Our Changing World
  evaluate the impacts of various machines and their mechanisms on society and the environment
  
• D2. Exploring and Understanding Concepts
  demonstrate an understanding of the basic principles and functions of machines and their mechanisms
  

Grade 5: Science and Technology

• A1. STEM Investigation and Communication Skills
  use a scientific research process, a scientific experimentation process, and an engineering design process to conduct investigations, following appropriate health and safety procedures
  
• D2. Exploring and Understanding Concepts
  demonstrate an understanding of forces that act on structures, and how various structures withstand them
  
• E2. Exploring and Understanding Concepts
  demonstrate an understanding of the conservation of energy, and the forms, sources, and uses of energy and resources

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