APES Ecocolumn Lab

What is a system according to the passage?

• A set of interconnected components

• A single independent entity

• A random collection of items

• A disorganized structure

Explain the difference between an open system and a closed system as described in the text.

What is the purpose of the ecocolumn lab as mentioned in the passage?

• To study the interactions within an ecosystem

• To analyze chemical reactions

• To measure physical properties

• To observe astronomical phenomena

Why might an aquarium be considered a more 'closed' system?

• Because it is isolated from its environment.

• Because it requires constant human intervention.

• Because it has a limited number of species.

• Because it is a self-sustaining ecosystem.

What is the purpose of the aquatic plant?

• To provide oxygen through photosynthesis

• To filter and purify the water

• To serve as food for aquatic animals

• To add aesthetic value to the project

The purpose of the 'Dissolved Oxygen' test in water quality analysis is to:

• Measure the amount of oxygen available in water for aquatic life.

• Determine the pH level of the water.

• Assess the presence of heavy metals in the water.

• Evaluate the turbidity of the water.

How is pH measured in water quality tests, and why is it important?

• pH is measured using a pH meter or pH strips, and it is important because it affects the chemical and biological processes in water.

• pH is measured using a thermometer, and it is important because it determines the temperature of the water.

• pH is measured using a barometer, and it is important because it affects the air pressure above the water.

• pH is measured using a hygrometer, and it is important because it determines the humidity level in the water.

What is the significance of monitoring 'Temperature' in water quality tests?

• Temperature affects the solubility of oxygen in water.

• Temperature has no impact on aquatic life.

• Temperature does not influence chemical reactions in water.

• Temperature is irrelevant to water quality.

What is the role of 'Phosphate' in water quality testing and its potential impact on aquatic life?

• Phosphate is a nutrient that can lead to algal blooms, affecting aquatic life.

• Phosphate is a pollutant that has no impact on aquatic life.

• Phosphate is a chemical that improves water clarity and benefits aquatic life.

• Phosphate is a mineral that reduces oxygen levels in water, harming aquatic life.

What are three possible reasons for significant differences between the Ecosystem Columns in the lab?