Earth Science 2024 Review

Front

What is the effect of increased volcanic activity on ocean pH levels?

Back

Increased volcanic activity raises CO₂ levels in the atmosphere and ocean, leading to a decrease in pH levels.

Front

What process primarily powers the Sun?

Back

Nuclear fusion is the process that primarily powers the Sun and produces its energy.

Front

Which planet has an atmosphere primarily composed of hydrogen and helium?

Back

Jupiter has an atmosphere mostly made up of hydrogen and helium.

Front

What does an eccentricity of 0.017 indicate about Earth's orbit?

Back

An eccentricity of 0.017 indicates that Earth's orbit is closer to circular compared to Mercury's orbit, which has an eccentricity of 0.21.

Front

What powers convection currents in the Earth's mantle?

Back

Heat from Earth's core powers convection currents in the mantle, which push lithospheric plates on Earth's crust.

Front

Define 'eccentricity' in the context of planetary orbits.

Back

Eccentricity is a measure of how much an orbit deviates from being circular; a lower value indicates a more circular orbit.

Front

What is the primary gas released by volcanic eruptions that affects ocean acidity?

Back

Carbon dioxide (CO₂) is the primary gas released by volcanic eruptions that contributes to ocean acidity.

Front

Explain the difference between nuclear fission and nuclear fusion.

Back

Nuclear fission is the splitting of a heavy nucleus into smaller nuclei, while nuclear fusion is the combining of light nuclei to form a heavier nucleus.

Front

What is the significance of convection currents in the mantle?

Back

Convection currents in the mantle are significant because they drive the movement of tectonic plates, leading to geological activity.

Front

Which planet is closest to the Sun?

Back

Mercury is the planet closest to the Sun.