, BLG1501 Assignment 2 (COMPLETE ANSWERS)
Semester 1 2025 (225234) - DUE 11 April 2025
[20]
Question 1
1.1 Write explanatory notes on the greenhouse effect. (7)
1.2 Distinguish between hypertonic, hypotonic, and (6)
isotonic solutions.
1.3 Explain how edges and corridors can strongly influence
landscape biodiversity. (7)
Question 1 (20 marks)
1.1 The Greenhouse Effect (7 marks)
The greenhouse effect is a natural process that
warms the Earth’s surface. It occurs when the Sun’s
energy reaches Earth, where some of it is absorbed
by the surface while the rest is radiated back into
space as infrared heat. Greenhouse gases (GHGs)
such as carbon dioxide (CO₂), methane (CH₄),
nitrous oxide (N₂O), and water vapor trap some of
this heat, preventing it from escaping into space.
This trapped heat helps maintain Earth's temperature
at a level suitable for life. However, human activities
such as burning fossil fuels, deforestation, and
industrial emissions have increased GHG levels,
intensifying the greenhouse effect and leading to
global warming.
Semester 1 2025 (225234) - DUE 11 April 2025
[20]
Question 1
1.1 Write explanatory notes on the greenhouse effect. (7)
1.2 Distinguish between hypertonic, hypotonic, and (6)
isotonic solutions.
1.3 Explain how edges and corridors can strongly influence
landscape biodiversity. (7)
Question 1 (20 marks)
1.1 The Greenhouse Effect (7 marks)
The greenhouse effect is a natural process that
warms the Earth’s surface. It occurs when the Sun’s
energy reaches Earth, where some of it is absorbed
by the surface while the rest is radiated back into
space as infrared heat. Greenhouse gases (GHGs)
such as carbon dioxide (CO₂), methane (CH₄),
nitrous oxide (N₂O), and water vapor trap some of
this heat, preventing it from escaping into space.
This trapped heat helps maintain Earth's temperature
at a level suitable for life. However, human activities
such as burning fossil fuels, deforestation, and
industrial emissions have increased GHG levels,
intensifying the greenhouse effect and leading to
global warming.
