# Tier 2

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#### Storyboard Text

• What is a force? I'll give you a raider buck if you know it. ﻿
• I know! A force is a push or a pull exerted on an object.﻿
• What is net force? I'll give you a raider buck if you know it. ﻿
• I know! Net force is the combination of all forces acting on an object.﻿
• What is inertia? I'll give you a raider buck if you know it. ﻿
• I know! Inertia is the tendency of an object to resist a change in motion.﻿
• The class is studying vocab for science. Mr. Ron just asked the class what a force is. ﻿Liam answered correctly.
• What are gravity, mass, and weight?﻿
• We know! Gravity is a force that pulls objects with mass towards each other. Mass is the amount of matter in an object. Weight is the effect of gravity on an object's mass.
• The class is studying vocab for science. Mr. Ron just asked the class what net force is. ﻿Rob answered correctly.
• The Universal Law of Gravitation states...﻿
• The class is studying vocab for science. Mr. Ron just asked the class what inertia is. George answered correctly.
• The class is studying vocab for science. Mr. Ron just asked the class what gravity, mass, and weight are. They all answered correctly.
• The class is studying vocab for science. They don't know the last three words so Mr. Ron tells them that the Universal Law of Gravitation states that gravity is affected by mass and distance. He also tells them that friction is a force exerted by a surface as an object moves across it or makes an effort to move across it. He explains that a newton is the SI unit of force.
• The class has done a good job studying vocab.
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