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Starting your Group 4 Project but feeling stuck for ideas? You’re in the right place! In this post, we’ll share creative and inspiring Group 4 Project ideas to help you get started.
IB Group 4 Project Examples + Ideas
Example 1: Water Quality and Its Effects on Ecosystems
Research question/topic: Does water quality (pH, nutrients, oxygen) affect the variety of small animals living in streams or ponds?
Responsibilities:
- Biology: Identify and count small aquatic animals (insects, snails, etc.).
- Chemistry: Test water for pH, nitrates, phosphates, and dissolved oxygen.
- Physics: Measure temperature, water clarity (turbidity), and water flow speed.
What you need: Kick net or kitchen sieve, trays, spoons/tweezers, magnifying glass or microscope, identification guide, water test kits (pH, nitrate, phosphate, oxygen), thermometer, stopwatch, floating object for flow speed, turbidity tube or clear bottle.
Steps:
- Pick 3–4 different sites (e.g., clean stream, pond near a road, stream by farmland).
- At each site:
- Physics team: Measure water temperature, flow speed (time a floating object), and turbidity (how clear the water is).
- Chemistry team: Take water samples and test for pH, nitrates, phosphates, oxygen.
- Biology team: Collect animals with a net, sort them, and record what you find.
- Compare results – do cleaner sites have more variety in animals?
Presentation idea: Show maps of your sites, photos of organisms, and graphs linking water quality to biodiversity. End with an “overall health score” for each site.
Example 2: Thermal Pollution in Freshwater
Research question/topic: How does water temperature affect oxygen levels and the activity of aquatic organisms?
Responsibilities:
- Biology: Observe animal activity (e.g., Daphnia heart rate, fish movement, or plant bubble production).
- Chemistry: Measure dissolved oxygen at different temperatures.
- Physics: Measure and control water temperature, explain why oxygen changes with heat.
What you need: Beakers or small tanks, thermometers, heaters/ice, oxygen probe or chemical test, stopwatch, Daphnia (from aquarium store), Elodea plants, or small fish.
Steps:
- Set up water at 3–4 different temperatures (e.g., 15°C, 20°C, 25°C, 30°C).
- At each temperature:
- Chemistry team: Measure oxygen levels.
- Biology team: Measure activity (count Daphnia heartbeats for 10 seconds, or count plant bubbles).
- Physics team: Keep temperature stable and record it accurately.
- Compare how oxygen levels and activity change as the water gets warmer.
Presentation idea: A simple graph showing oxygen going down and animal activity going up with temperature. Include a short video of your experiment.
Example 3: UV Radiation and Microorganisms
Research question/topic: How does UV light intensity or sunscreen affect the survival of microorganisms?
Responsibilities:
- Biology: Grow yeast or safe bacteria and count colonies after UV exposure.
- Chemistry: Test how much UV passes through sunscreen or filters.
- Physics: Measure UV intensity and calculate total exposure time.
What you need: Petri dishes with yeast/bacteria, UV lamp or sunlight, sunscreen, clear plastic sheets, stopwatch, UV meter or app.
Steps:
- Biology team: Spread yeast/bacteria evenly on agar plates.
- Cover some plates with sunscreen-coated plastic, others with plain plastic, and leave some uncovered.
- Expose to UV for different times.
- Incubate for 1–2 days and count colonies.
- Chemistry team: Measure how much UV passes through each cover.
- Physics team: Record UV intensity and calculate dose (intensity × time).
Presentation idea: Photos of plates, graphs of survival vs exposure time, and a table showing UV protection of each filter.
Example 4: Biodegradable Plastic Breakdown
Research question/topic: Do biodegradable plastics break down faster in compost, soil, or water?
Responsibilities:
- Biology: Observe any mold or microbial growth on the plastic.
- Chemistry: Measure pH changes in the environment around the plastic.
- Physics: Measure weight loss of the plastic and any changes in flexibility.
What you need: Biodegradable plastic bags or cups, scissors, compost, soil, containers of water, scale, ruler, thermometer, gloves.
Steps:
- Cut plastic into small, equal-sized pieces and weigh them.
- Place pieces in jars of compost, soil, or water.
- Leave for 2–3 weeks, checking weekly:
- Biology team: Look for visible mold or microbial growth.
- Chemistry team: Measure pH of compost/soil/water.
- Physics team: Weigh the plastic, bend it gently to see if it has softened.
- Compare which environment broke down the plastic the fastest.
Presentation idea: Show photos of plastic before/after, a bar chart of weight loss, and a ranking of which environment was most effective.
Example 5: Biofuel Energy Content
Research question/topic: Which fuel source – algae, used cooking oil, or vegetable oil – gives the most energy per gram?
Responsibilities:
- Biology: Grow algae and measure how much biomass it produces.
- Chemistry: Prepare the fuel (filtering or drying) and measure density.
- Physics: Burn a small amount under a can of water and measure temperature rise.
What you need: Clear bottles, algae culture (optional), cooking oils, simple calorimeter (can + stand), thermometer, scale.
Steps:
- Biology team: If using algae, grow it in bottles for a week and measure dry weight.
- For each fuel:
- Chemistry team: Measure a fixed amount by weight.
- Physics team: Burn the fuel under a can with a set amount of water, record temperature change.
- Calculate energy per gram using Q = mwater × 4.18 × ΔT.
Presentation idea: Bar graph comparing energy per gram for each fuel. Include a short explanation of pros and cons of each source.
Example 6: Urban Heat Islands and Local Climate
Research question/topic: How does vegetation cover affect temperature, air quality, and human comfort in different parts of the city?
Responsibilities:
- ESS: Link land cover to microclimate and human wellbeing; urban planning implications.
- Biology: Survey plant cover (species richness, % canopy).
- Chemistry: Measure air pollutant levels (NO₂, particulate matter using simple sensors or indicator tubes).
- Physics: Measure air and surface temperature, humidity, and light intensity.
Steps:
- Choose 3–4 contrasting sites (e.g., park, street with few trees, residential area, parking lot).
- Physics team: Measure temperature and humidity at 1.5 m height, and surface temperature with an infrared thermometer.
- Chemistry team: Use air quality kits or portable sensors to measure pollutants.
- Biology/ESS team: Record plant cover and species diversity.
- Compare how vegetation affects temperature, pollution, and comfort levels.
Presentation idea: Map with color-coded temperature zones, pollution graphs, and biodiversity scores — show how vegetation cools and cleans urban air.
Example 7: Cooling Strategies and Exercise Performance
Research question/topic: How do different cooling methods affect body temperature and heart rate recovery after exercise?
Responsibilities:
- SEHS: Study exercise physiology, thermoregulation, and performance.
- Biology: Measure heart rate and recovery time; record sweating rate.
- Chemistry: Measure electrolyte loss from sweat (simple sodium test strips).
- Physics: Measure temperature changes using infrared thermometers or skin temperature probes.
Steps:
- Have participants do a short, safe exercise (e.g., step test or light jog).
- Apply different cooling methods: cold water, ice towel, fan, or shade.
- SEHS/Biology team: Measure heart rate recovery and sweating rate.
- Chemistry team: Collect small sweat samples on filter paper; test sodium concentration.
- Physics team: Measure skin temperature before and after cooling.
Presentation idea: Graphs of recovery time vs cooling method, skin temperature change, and a sports science discussion of which method works best.
We hope you found this post helpful. For more useful materials associated with the IB check out the wide variety of IA, EE and TOK exemplars available at Clastify and other guides available on our blog.
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