Child Development Crossword Puzzle

2. ______ in the United States has gradually increased over the past several decades.
6. Both heredity and environment are involved in _______ variations.
7. Programs should emphasize enjoyable, informal, games, and individual exercise to promote __________.
10. Rough and ____ play occurs during the preschool years and peaks in middle-school
13. Rough and tumble play helps children develop __________ hierarchy
15. ____ motor development is evident in a child's writing and drawing.
16. During school years a child's _______ motor development becomes more refined.
17. Body ______ during school years starts at a slow pace in early childhood.

1. Legally children are required to wear protective helmets while bicycling, skateboarding, or scootering to avoid help prevent _________.
3. Involvement in _______ has been linked to improved academic achievement
4. By the end of school years ________ affect about 25 percent of children.
5. Childhood _____ is difficult to treat because it's a family disorder
8. _______ is important, especially with a child increasing focus on play, friendship, and new activities.
9. When there is a change in body size from generation to generation. This is called _______ trends in physical growth
11. ______ is a condition where a child's upper and lower teeth do not meet
12. Children with a history of bed ______ are more likely to have children with the same problem.
14. One of 10 percent of U.S. school-age children suffer from nocturnal _______