Attention: Safety Recall of Vernier Go Direct Charge Station. Click to learn more.


A4.2.5—Evidence for a biodiversity crisis


Here are experiments our science specialists have selected to support this IB* topic.

Acid Rain

Experiment #18 from Biology with Vernier

In this experiment, you will

  • Measure pH.
  • Study the effect of dissolved CO2 on the pH of distilled water.
  • Study the effect on pH of dissolving H2SO4 in various waters.
  • Learn why some bodies of water are more vulnerable to acid rain than others.

Studying Microclimates: Urban Heat Islands

Experiment #11 from Climate and Meteorology Experiments

  • Develop a protocol to measure weather conditions at two different locations.
  • Collect data and compare to weather forecasts for a period of at least 5 days.
  • Extrapolate from your data if your locations could be considered a microclimate compared to your regional climate data.

Educational Standard
International Baccalaureate (IB) 2025
A Unity and Diversity
Level of organization
4 Ecosystems
A4.2 Conservation of biodiversity
Standard level and higher level

* The IB Diploma Program is an official program of the International Baccalaureate Organization (IBO) which authorizes schools to offer it. The material available here has been developed independently of the IBO and is not endorsed by it.