OCR A-Level Chemistry B: Salters (H433) · OCR H433
OC Oceans
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Oceans
- Explain why the pH of the world's oceans has been decreasing over the last 200 years, and … (5 marks, Explain)
- Coral reefs are built from calcium carbonate secreted by marine organisms. Scientists have… (5 marks, Explain)
- Explain why the oceans contain dissolved salts and describe how the concentration of these… (5 marks, Explain)
- A marine biologist is studying the shells of oysters in a coastal bay. She notices that ne… (5 marks, Explain)
- Seawater contains many dissolved substances. A scientist collects seawater samples from tw… (5 marks, Describe and Explain)