Match each property with the benefit it provides to people on Earth.
A. magnetic field – prevents charged particles from the sun from reaching the surface
B. ozone – filters cancer-causing rays from the sun
C. carbon dioxide – retains heat energy from the sun in the atmosphere
D. water in oceans, lakes, rivers, and streams – moderates changes in temperature on the surface
The Correct Answer and Explanation is:
The properties and their corresponding benefits to people on Earth can be matched as follows:
- A. magnetic field – prevents charged particles from the sun from reaching the surface
- B. ozone – filters cancer-causing rays from the sun
- C. carbon dioxide – retains heat energy from the sun in the atmosphere
- D. water in oceans, lakes, rivers, and streams – moderates changes in temperature on the surface
Explanation
A. Magnetic Field: Prevents Charged Particles from the Sun from Reaching the Surface
The Earth’s magnetic field acts as a shield against solar wind, which consists of charged particles emitted by the sun. This field deflects these particles, preventing them from stripping away the atmosphere and reaching the surface, which is crucial for the protection of living organisms and technology. Without this magnetic field, Earth would be exposed to higher levels of radiation, which could lead to increased rates of cancer and other harmful effects on health.
B. Ozone: Filters Cancer-Causing Rays from the Sun
The ozone layer, situated in the stratosphere, absorbs a significant amount of the sun’s harmful ultraviolet (UV) radiation. This filtering effect is vital for protecting skin and eye health, reducing the incidence of skin cancers and cataracts. The depletion of the ozone layer due to human-made chemicals has raised concerns about increased UV exposure, which emphasizes the importance of maintaining this protective layer.
C. Carbon Dioxide: Retains Heat Energy from the Sun in the Atmosphere
Carbon dioxide (CO₂) is a greenhouse gas that plays a critical role in regulating Earth’s temperature by trapping heat in the atmosphere. This natural greenhouse effect is essential for maintaining a stable climate, which supports life. Without sufficient CO₂, Earth would be too cold to sustain life as we know it. However, excessive CO₂ from human activities is contributing to global warming, highlighting the balance required in its concentration.
D. Water in Oceans, Lakes, Rivers, and Streams: Moderates Changes in Temperature on the Surface
Water has a high specific heat capacity, meaning it can absorb and store large amounts of heat energy without significantly changing temperature. This property allows large bodies of water to moderate climate and temperature variations, providing a more stable environment for ecosystems and human habitation. It influences weather patterns and plays a vital role in the water cycle, which is crucial for sustaining life on Earth.