Hello my Grade 4 scientists, I want to tell you about a really fun activity we are going to be starting in science. Now that you have a better understanding about pulleys and gears over the two weeks we are now going to take all that knowledge and create something. Since we are also learning about medieval times I want to combine these two subjects and you are going to create your own castle! You will be designing, building and explaining systems that would supply a castle with water and defend it with a catapult and drawbridge. You will then have to incorporate pulleys and gears into this system. I have attached a game that you can play to get you comfortable with pulleys and gears as well as refer to my previous post about medieval times as there is a link that takes you on a tour of a castle. I will also provide you with a task sheet in class tomorrow so you get a better understanding of what is required for this activity.

• Simple Machines