Final answer:
A number sentence representing the scenario is 5 + 4 = 9, demonstrating that Jack made 5 ornaments, Emma made 9, and Emma made 4 more than Jack.
Step-by-step explanation:
The question requires forming a number sentence to represent the situation described. Jack made 5 ornaments and Emma made 9, with the statement that Emma made 4 more ornaments than Jack. To represent this mathematically, you can write the equation 5 + 4 = 9.
This shows that if you add 4 ornaments to the amount Jack made, you will have the number of ornaments Emma made.