# data[].attributes.headline
What can make an object move or not move?

# data[].attributes.subject
What can make an object move or not move?

# data[].attributes.body
Why does the train rise?

# data[].attributes.body
Why does the train rise without anything touching it?

# data[].attributes.body
What makes an object start to move?

# data[].attributes.headline
A force acts between two objects. (Chapter 1)

# data[].attributes.subject
A force acts between two objects. (Chapter 1)

# data[].attributes.headline
When an object starts moving or stops moving, that is evidence that force has acted on it. (Chapter 1)

# data[].attributes.subject
When an object starts moving or stops moving, that is evidence that force has acted on it. (Chapter 1)

# data[].attributes.body
How can a force act without objects touching it?

# data[].attributes.body
In what ways can magnetic forces make an object move?

# data[].attributes.headline
Some forces happen between objects that are touching. Other forces happen between objects that are not touching. (Chapter 2)

# data[].attributes.subject
Some forces happen between objects that are touching. Other forces happen between objects that are not touching. (Chapter 2)

# data[].attributes.headline
Non-touching forces can act between magnets and some, but not not all, other objects. (Chapter 2)

# data[].attributes.subject
Non-touching forces can act between magnets and some, but not not all, other objects. (Chapter 2)

# data[].attributes.headline
Magnets can attract or repel other magnets. (Chapter 2)

# data[].attributes.subject
Magnets can attract or repel other magnets. (Chapter 2)

# data[].attributes.headline
Magnets can attract some metal objects. (Chapter 2)

# data[].attributes.subject
Magnets can attract some metal objects. (Chapter 2)