ES Unit 1 Skill B Mastery Check

What is a system?

• A randomly assembled group of unrelated objects
• A collection of parts that function independently without affecting each other
• A set of parts that interact and impact each other
• A single component that operates in isolation from other

Which of these is not an example of a system?

• The water cycle
• The biosphere
• A raindrop
• A food web
• These are all examples of systems

Which type of feedback loop is described? Deforestation leads to soil erosion, which reduces vegetation growth and causes further deforestation.

• Positive feedback loop
• Negative feedback loop

Which feedback loop is more common in environmental systems?

• Positive, it destabilizes systems, amplifying change
• Negative, it stabilizes systems, promoting balance
• Positive, it stabilizes systems, promoting balance
• Negative, it destabilizes systems, amplifying change

What are the four spheres on Earth?

• Lithosphere, atmosphere, aquasphere, biosphere
• Biosphere, geosphere, hydrosphere, atmosphere
• Hydrosphere, lithosphere, ecosphere, atmosphere
• Atmosphere, lithosphere, stratosphere, biosphere

Which is true of Earth's spheres?

• They exist independently without affecting one another
• They all consist of non-living components only
• They are interconnected and changes in one can impact the others
• They remain constant over time and do not change

Which sphere includes rocks, soil, and minerals?

• Biosphere
• Ecosphere
• Hydrosphere
• Geosphere
• Each of these spheres includes rocks, soil, and minerals

What percentage of Earth's water is freshwater?

• 10%
• 25%
• 2.5%
• 50%

What is the cryosphere?

• The gaseous part of the hydrosphere
• The frozen part of the hydrosphere
• The living organisms in the ecosphere
• The minerals within the lithosphere

Which gas makes up 78% of the atmosphere?

• Oxygen
• Carbon dioxide
• Nitrogen
• Hydrogen