A student conducted three experiments to investigate how a new liquid fertilizer affects t… — ACT

A student conducted three experiments to investigate how a new liquid fertilizer affects the stem growth of a certain plant species under various environmental conditions. In each experiment, the plants were grown in identical pots with standard soil:

* Experiment 1 was conducted in a low-light environment ( $500\text{ lux}$ ).
* Experiment 2 was conducted in a high-light environment ( $2{}000\text{ lux}$ ).
* Experiment 3 was conducted in a high-temperature chamber ( $30^\circ\text{C}$ ).

To determine if the liquid fertilizer is effective, the student must compare the fertilizer-treated plants to the correct control groups. Match each experimental setup with the correct control group configuration required to isolate the fertilizer's effect.

Plants in Experiment 1 receiving $10\text{ mL}$ of liquid fertilizer daily under $500\text{ lux}$ lightPlants grown under $500\text{ lux}$ light receiving $10\text{ mL}$ of distilled water daily
Plants in Experiment 2 receiving $10\text{ mL}$ of liquid fertilizer daily under $2{}000\text{ lux}$ lightPlants grown under $2{}000\text{ lux}$ light receiving $10\text{ mL}$ of distilled water daily
Plants in Experiment 3 receiving $10\text{ mL}$ of liquid fertilizer daily at $30^\circ\text{C}$ Plants grown at $30^\circ\text{C}$ receiving $10\text{ mL}$ of distilled water daily

Cevap

Match the low-light experimental setup with the low-light water control, the high-light experimental setup with the high-light water control, and the high-temperature experimental setup with the high-temperature water control.

For each experimental setup, the correct control group must keep all variables constant except for the fertilizer itself. Thus, the plants receiving fertilizer under

500\text{ lux}

light must be compared to plants receiving water under

500\text{ lux}

light. The plants receiving fertilizer under

2{}000\text{ lux}

light must be compared to plants receiving water under

2{}000\text{ lux}

light. The plants receiving fertilizer at

30^\circ\text{C}

must be compared to plants receiving water at

30^\circ\text{C}

Adım Adım Çözüm

Identify the independent variable being tested in the experiments.

The independent variable is the presence of the liquid fertilizer (

10\text{ mL}

of fertilizer vs.

10\text{ mL}

of distilled water).

The study aims to determine the effect of the fertilizer on plant stem growth.

Identify the environmental variables that must be controlled (kept constant) for each individual experimental setup.

For the low-light setup, light must remain at

500\text{ lux}

. For the high-light setup, light must remain at

2{}000\text{ lux}

. For the high-temperature setup, temperature must remain at

30^\circ\text{C}

To isolate the effect of the independent variable, all other variables must be identical between the experimental and control groups.

Match each experimental setup with the control setup that has the same environmental conditions but lacks the fertilizer.

The low-light fertilizer setup matches the low-light water control. The high-light fertilizer setup matches the high-light water control. The high-temperature fertilizer setup matches the high-temperature water control.

This configuration ensures that any difference in growth can be attributed solely to the fertilizer rather than environmental differences.

Anahtar Kavram

A control group must keep all environmental and baseline conditions identical to the experimental group, except for the single independent variable being tested.

Tahmini Süre:1m 30s

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