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Unit 3 notes summarised
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EcologyEffect of mineral content on plant growth
Hypothesis:
Increased mineral content in soil will positively impact plant growth, as
minerals play a crucial role in essential biochemical processes.
Plants require minerals for functions like photosynthesis, enzyme
activation, and structural development. A higher mineral
concentration should enhance these processes, promoting overall plant
growth.
Equipment and Reason for Use:
1. Soil samples with varying mineral content
2. Planting containers
3. Watering system
4. Measuring instruments (pH meter, nutrient tester)
5. Growth monitoring tools (height and leaf count)
The equipment is essential to manipulate and measure mineral content,
ensuring controlled experimentation.
Variables:
- Independent Variable: Mineral content in soil
- Dependent Variable: Plant growth (height and leaf count)
- Control Variables: Light, temperature, water, and soil type to ensure
accurate assessment of the impact of mineral content.
Health and Safety:
1. Use gloves when handling soil and minerals.
2. Avoid inhalation of dust particles from minerals.
3. Ensure proper ventilation in the experiment area.
Method:
1. Prepare soil samples with different mineral concentrations.
2. Plant seeds in each soil sample and water them consistently.
3. Monitor and record plant growth regularly.
4. Measure and analyze the mineral content in each soil sample
periodically.
, Effect of water presence on plant growth
Hypothesis:
Adequate water presence positively influences plant growth, as water
is essential for various physiological processes, including
photosynthesis, nutrient absorption, and cell expansion.
Water is a crucial component in plant biology, serving as a solvent for
nutrients, participating in metabolic reactions, and maintaining turgor
pressure for cell structure. Sufficient water availability is expected to
optimize these processes, fostering overall plant growth.
Equipment and Reason for Use:
1. Planting containers
2. Watering system (for controlled water application)
3. Soil samples
4. Measuring instruments (moisture meter, growth monitoring tools)
The equipment facilitates controlled watering and monitoring,
ensuring accurate assessment of the impact of water on plant growth.
Variables:
- Independent Variable: Water presence (amount and frequency)
- Dependent Variable: Plant growth (height, leaf count, overall health)
- Control Variables: Soil type, light exposure, temperature, and
nutrient levels to isolate the influence of water.
Health and Safety:
1. Avoid overwatering to prevent waterlogging.
2. Use appropriate irrigation methods to minimize the risk of soil-
borne diseases.
Method:
1. Plant seeds in uniform soil samples.
2. Implement different watering regimes (varying amounts and
frequencies).
3. Monitor and record plant growth regularly, considering height, leaf
count, and overall health.
4. Measure soil moisture content periodically.
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