Background: Newton was the first one to suggest that gravity is universal and affects all objects in the universe. That’s why his law of gravity is called the law of universal gravitation . Universal gravitation means that the force that causes an apple to fall from a tree to the ground is the same force that causes the moon to keep moving around Earth. Universal gravitation also means that while Earth exerts a pull on you, you exert a pull on Earth. In fact, there is gravity between you and every mass around you — your desk, your book, your pen. Even tiny molecules of gas are attracted to one another by the force of gravity.

Situation: Joe was bored and really didn't want to do homework. He could not think of anything to write about gravity. Instead he kept leaning back on his chair and tossing his pencil in the air. He through the pencil up and every time it fell back towards him and he caught it.Once he leaned back to far and his chair went crashing to the floor. Startled he decided he should get to work.

Question: what was pulling on the chair?

Situation: Joe was bored and really didn't want to do homework. He could not think of anything to write about gravity. Instead he kept leaning back on his chair and tossing his pencil in the air. He through the pencil up and every time it fell back towards him and he caught it.Once he leaned back to far and his chair went crashing to the floor. Startled he decided he should get to work.

Question: What made the pencil fall?

Situation: Joe was bored and really didn't want to do homework. He could not think of anything to write about gravity. Instead he kept leaning back on his chair and tossing his pencil in the air. He through the pencil up and every time it fell back towards him and he caught it.Once he leaned back to far and his chair went crashing to the floor. Startled he decided he should get to work.

Question: Will the pencil always fall bsck to earth or only sometimes?

Situation: Joe was bored and really didn't want to do homework. He could not think of anything to write about gravity. Instead he kept leaning back on his chair and tossing his pencil in the air. He through the pencil up and every time it fell back towards him and he caught it.Once he leaned back to far and his chair went crashing to the floor. Startled he decided he should get to work.

Question: Why did the chair fall to the floor?

Situation: Beth liked to hike in the forest and watch the birds and other wildlife. One day she decided stopped to rest near a clearing and was enjoying the view. It was late autumn and she watched as the leaves fell from the trees and drifted to the ground. Before heading home she walked to a near by river to see the small waterfall there. She always found it peaceful to watch the water go over the edge and fall to the river below.

Question: Was the the same or a diffrent force acting on the leaves and the water??

Situation: Beth enjoyed everything about hiking  in the forest she especially liked to watch nature. One day she decided stopped to rest near a clearing and was enjoying the view. It was late autumn and she watched as the leaves fell from the trees and drifted to the ground. Before heading home she walked to a near by river to see the small waterfall there. She always found it peaceful to watch the water go over the edge and fall to the river below.

Question: What was gravity pulling on in the forest?

Situation: Beth enjoyed everything about hiking  in the forest she especially liked to watch nature. One day she decided stopped to rest near a clearing and was enjoying the view. It was late autumn and she watched as the leaves fell from the trees and drifted to the ground. Before heading home she walked to a near by river to see the small waterfall there. She always found it peaceful to watch the water go over the edge and fall to the river below.

Question: What was gravity pulling onat the river?

Situation: Beth enjoyed everything about hiking  in the forest she especially liked to watch nature. One day she decided stopped to rest near a clearing and was enjoying the view. It was late autumn and she watched as the leaves fell from the trees and drifted to the ground. Before heading home she walked to a near by river to see the small waterfall there. She always found it peaceful to watch the water go over the edge and fall to the river below.

Question: Gravity between the earth and what made it fall to the ground??

Situation: Beth enjoyed everything about hiking  in the forest she especially liked to watch nature. One day she decided stopped to rest near a clearing and was enjoying the view. It was late autumn and she watched as the leaves fell from the trees and drifted to the ground. Before heading home she walked to a near by river to see the small waterfall there. She always found it peaceful to watch the water go over the edge and fall to the river below.

Question: Gravity between the earth and what made it fwll to the river below?

Situation: Beth enjoyed everything about hiking  in the forest she especially liked to watch nature. One day she decided stopped to rest near a clearing and was enjoying the view. It was late autumn and she watched as the leaves fell from the trees and drifted to the ground. Before heading home she walked to a near by river to see the small waterfall there. She always found it peaceful to watch the water go over the edge and fall to the river below.

Question: What would have happened to a rock if Beth had tossed it into the air?