حل كتاب المدرسة ديسكفر للصف الثالث الابتدائى ترم اول ديسكفرى ثالثه ابتدائى شرح كتاب ديسكفر ثالثه ابتدئى شرح الدرس 4 Discover ديسكفر للصف الثالث الابتدائى ترم اول CHAPTER 2 MAKING A HEALTHY BODY 1. What happened to the side without sunscreen? Did the paper’s color change or stay the same?2. How is the side with sunscreen diff erent from the side without sunscreen? 3. You saw the eff ect sunscreen had on paper. What eff ect do you think sunscreen has on our skin? 4. What does this investigation teach us about the importance of using something to block our skin from sun rays? Use the information you recorded during the investigation to answer the questions.INVESTIGATION CONCLUSIONS BONES AND MUSCLES WORK TOGETHERYour body is made of many parts that work together to keep you alive. Bones and muscles work together to help you move and protect soft organs. Movement Your bones make up your skeleton. Your skeleton could not move without muscles. Most muscles are attached to bones. When you move your muscles, your skeleton moves, too. Muscles lift and turn bones to help you eat, exercise, and play instruments.Hold your arms out to your sides. Can you feel muscles working? Are your shoulders getting tired? Shoulder muscles are attached to your arm bones. These muscles lift and move your arms. Protection Muscles and bones have another important job. They shield soft organs like your heart, lungs, and brain. Organs do a lot of work to keep you alive, so they must be protected.Your skull bones work kind of like a helmet. If you bump your head, your brain is shielded. Can you feel bone behind your eyebrow? If you get hit in the face with a football, this bone protects your eyes. Muscles also shield your eyes by squeezing them shut. Many organs are found in your chest and torso. Your ribs form a protective cage around your chest. Can you feel them? These bones shield your heart and lungs.From protecting your brain to wiggling your toes and fi ngers, your bones and muscles have many jobs. They work together to keep you safe and on the move. Read all instructions carefully before you begin to build your mechanical fi nger.MECHANICAL FINGER