5 original questions from New Regents. The worksheet, answer key, and browser practice are free.
Checking Film Overlap at a Leaking Seam 5 questions
Checking Film Overlap at a Leaking Seam
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A workshop protects a flat panel by placing two impermeable patches over a permeable backing. Water can pass wherever the backing is uncovered. Where the patches overlap, the same region is blocked twice but counts only once as protected area. The panel’s area is 20 cm2. Each patch covers 8 cm2.
| Layout | Area where the two patches overlap (cm2) |
|---|---|
| P | 2 |
| Q | 5 |
Question 1
Which layout leaves less uncovered backing?
- P only
- Q only
- Both leave the same amount.
- Neither covers any backing.
Question 2
Calculate the uncovered backing area in each layout.
Write your answer and work on the printable worksheet, or answer online.
Question 3
A student says the two layouts must give the same leak rate because each uses the same amount of patch material. Evaluate the claim if the rate is proportional to uncovered area.
Write your answer and work on the printable worksheet, or answer online.
The workshop adds a third patch with area 4 cm2 to Q. It places two of those square centimeters on already covered backing.
Question 4
Predict the new uncovered area and decide whether it is as small as in P.
Write your answer and work on the printable worksheet, or answer online.
The workshop wants to check whether the uncovered area predicts the initial leak rate in the original layouts. The water can also run around the outside edge if that edge is unsealed.
Question 5
Describe a test that isolates the effect of uncovered backing area. State which result would support the model.
Write your answer and work on the printable worksheet, or answer online.
2025 Chemistry Reference Tables · Browse Chemistry worksheets