Science Assessment

Two children are playing on a swing set. When the boy pushes the girl, her speed increases.

As the boy is pushing the girl on the swing, what happens to the energy each child has? 

1. The boy’s energy increases, and the girl’s energy increases because they are both moving.
2. The boy’s energy decreases, and the girl’s energy decreases because they both use up energy while they move.
3. The boy’s energy decreases, and the girl’s energy increases because the boy transferred some of his energy to the girl when he pushed her.
4. The boy’s energy decreases, and the girl’s energy stays the same because the boy used energy to push the girl, and the girl just sat on the swing.