Test on Optimizing Crop Growth Conditions

Question 1: Automated monitoring of environmental conditions, including temperature, humidity, and soil moisture levels, is frequently employed in polytunnels to facilitate necessary adjustments.

A. Ano

B. Ne

Explanation: The study materials state that conditions inside, such as temperature, humidity, and level of moisture in the soil, are often monitored automatically so that adjustments can be made as required.

Question 2: The primary role of adequate ventilation in a polytunnel is to remove excess carbon dioxide produced by the crop plants.

A. Ano

B. Ne

Explanation: Adequate ventilation is important to help replace carbon dioxide from the air outside, preventing a drop in carbon dioxide levels inside the polytunnel due to its use by plants in photosynthesis.

Question 3: According to the 'Practical activity – using a polythene bottle as a model polytunnel' described in the study material, which step is crucial for demonstrating the greenhouse effect?

A. Cutting a plastic drink bottle into two equal halves before use.

B. Placing one thermometer underneath the bottle and one on the soil outside the bottle.

C. Laying half of the bottle on some soil as a model polytunnel.

D. Monitoring the level of carbon dioxide inside the bottle.

Explanation: The study material states the activity involves placing one thermometer underneath the bottle and one on the soil outside to read temperatures at regular intervals. This comparison of temperatures inside and outside the bottle is crucial to demonstrate the greenhouse effect by showing the temperature difference created by the model polytunnel. The other options describe preparatory steps or monitoring activities not explicitly part of the greenhouse effect demonstration with thermometers, or an incorrect action for this specific model.

Question 4: According to the practical activity, what is the primary purpose of using a polythene bottle as a model polytunnel?

A. To provide adequate ventilation for crop plants.

B. To monitor the artificial supply of carbon dioxide.

C. To demonstrate the benefits of a polytunnel and the greenhouse effect.

D. To study the effect of soil moisture on temperature.

Explanation: The study materials state, 'Using half a polythene bottle in this way gives a simple model that shows the benefits of a polytunnel and demonstrates the greenhouse effect.'

Question 5: Only chemical fertiliser is used to replace mineral ions in soil for crop plants.

A. Ano

B. Ne

Explanation: The study materials state that fertiliser, used for mineral ion replacement, can be in the form of chemical fertiliser or 'organic' fertiliser, indicating more than one type is used.