Question

complete the activity to practice what you have learned.
match each natural cause of climate change with the timescale over which it occurs.
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human activity
changes to earth’s axis and orbit
volcanic eruptions
solar output
1–10 years thousands of years 10–100 years billions of years

Explanation:

1. Human activity: Human - induced climate change (like burning fossil fuels) has been significant over the past century, so the timescale is 10 - 100 years.
2. Changes to Earth’s axis and orbit: Milankovitch cycles (changes in Earth's axis and orbit) occur over thousands of years as they are long - term orbital and axial variations.
3. Volcanic eruptions: Volcanic eruptions are relatively short - term natural events, with their climate - affecting impacts occurring over 1 - 10 years (though some larger eruptions can have longer - lasting effects, but the typical short - term timescale for their occurrence and immediate climate impact is 1 - 10 years).
4. Solar output: Variations in solar output (like the 11 - year solar cycle) and longer - term solar changes occur over 10 - 100 years (with the solar cycle being around 11 years, and longer - term solar irradiance changes over decades to a century). Wait, correction: Solar output variations (including the solar cycle) are on a timescale of 1 - 10 years? No, the 11 - year solar cycle is within 1 - 10 years? Wait, 11 years is close to 1 - 10? No, 11 is more than 10. Wait, re - evaluating:

• Human activity: 10 - 100 years (industrial era climate change).
• Changes to Earth’s axis and orbit: thousands of years (Milankovitch cycles: precession, obliquity, eccentricity changes over thousands of years).
• Volcanic eruptions: 1 - 10 years (eruptions happen suddenly, and their climate impact (like ash in the atmosphere) is short - term, within a decade).
• Solar output: 10 - 100 years? No, the solar cycle is about 11 years, which is in the 1 - 10 years? Wait, 11 is just over 10, but maybe the intended match is:
• Human activity: 10 - 100 years.
• Changes to Earth’s axis and orbit: thousands of years.
• Volcanic eruptions: 1 - 10 years.
• Solar output: 10 - 100 years? No, maybe solar output is 1 - 10 years? Wait, no, the correct matches are:
• Human activity: 10 - 100 years (because human - caused climate change has been measurable over the last century or so).
• Changes to Earth’s axis and orbit: thousands of years (Milankovitch cycles operate over periods of 10,000 to 100,000 years, so "thousands of years" is appropriate).
• Volcanic eruptions: 1 - 10 years (a volcanic eruption's climate impact (e.g., cooling from ash) is relatively short - lived, within a few years to a decade).
• Solar output: 1 - 10 years (the solar cycle is about 11 years, which is in the 1 - 10 years range? Wait, 11 is more than 10, but maybe the question considers the solar cycle as 1 - 10 years for simplicity, or maybe I made a mistake. Alternatively, solar output could be 10 - 100 years. But let's go with the standard climate change timescales:
• Human activity: 10 - 100 years.
• Changes to Earth’s axis and orbit: thousands of years.
• Volcanic eruptions: 1 - 10 years.
• Solar output: 1 - 10 years (since the solar cycle is ~11 years, close to 1 - 10).

Answer:

• human activity: 10 - 100 years
• changes to Earth’s axis and orbit: thousands of years
• volcanic eruptions: 1 - 10 years
• solar output: 1 - 10 years (or if solar output is considered to have longer - term variations, 10 - 100 years, but the 11 - year solar cycle is in the 1 - 10 years range when rounded)

Wait, more accurately:

• Human activity: 10 - 100 years (due to industrialization - related emissions over the last 100 + years).
• Changes to Earth’s axis and orbit: thousands of years (Milankovitch cycles: precession ~23,000 years, obliquity ~41,000 years, eccentricity ~100,000 years).
• Volcanic eruptions: 1 - 10 years (eruptions occur and their climate impact (ash, sulfur dioxide) is felt within a decade).
• Solar output: 1 - 10 years (the 11 - year solar cycle, so within 1 - 10 years for the cycle, and longer - term solar changes over centuries, but the main short - term solar variation is the 11 - year cycle).

So the correct matches are:

• human activity: 10–100 years
• changes to Earth’s axis and orbit: thousands of years
• volcanic eruptions: 1–10 years
• solar output: 1–10 years (or if we consider longer - term solar changes, but the options are 1–10, thousands, 10–100, billions. Billions of years is for Earth's formation - related changes, not solar output or axis/orbit changes. So:

Final matches:

• human activity: 10–100 years
• changes to Earth’s axis and orbit: thousands of years
• volcanic eruptions: 1–10 years
• solar output: 1–10 years