Evidence - NASA Science

What is the primary cause of the current warming trend, according to the text?

• Subtle shifts in the Earth's orbit
• Natural fluctuations in the Earth's climate
• Human activities since the mid-1800s
• Volcanic eruptions and other natural events

What is the main reason why the Earth's oceans are warming?

• Increased solar activity
• Melting glaciers and ice sheets
• The absorption of heat from the atmosphere
• Changes in ocean currents

According to the text, what is the most significant impact of the increased carbon dioxide emissions on the Earth's oceans?

• Increased salinity
• Changes in ocean currents
• Ocean acidification
• Decreased oxygen levels

What is the primary difference between the current warming trend and past climate changes?

• The current warming trend is happening at a much faster rate.
• Past climate changes were caused by volcanic eruptions, while the current warming trend is caused by human activity.
• The current warming trend is causing the Earth to cool down, while past climate changes caused the Earth to warm up.
• The current warming trend is a natural cycle, while past climate changes were caused by human activity.

What is the main source of data used to track the loss of ice from the Greenland and Antarctic ice sheets?

• Satellite observations
• Ancient ice cores
• Tree rings
• Weather station data

What is the relationship between the amount of carbon dioxide in the atmosphere and the acidity of the ocean?

• As carbon dioxide levels increase, the ocean becomes more acidic.
• As carbon dioxide levels decrease, the ocean becomes more acidic.
• There is no relationship between carbon dioxide levels and ocean acidity.
• As carbon dioxide levels increase, the ocean becomes less acidic.

What is the most significant impact of the warming trend on the Earth's climate system?

• Increased rainfall events
• Decreased snow cover
• Rising sea levels
• The absorption of heat by the oceans.

Based on the information provided, what can you conclude about the relationship between the Earth's warming trend and the amount of solar energy reaching the planet?

• The warming trend is primarily caused by increased solar energy.
• The warming trend is not related to changes in solar energy.
• The warming trend is caused by a decrease in solar energy.
• The warming trend is caused by a slight increase in solar energy, but human activity is the dominant factor.

According to the text, what is the most significant factor contributing to the rise in global sea levels?

• Melting glaciers and ice sheets
• Increased precipitation
• Expansion of ocean water due to warming
• Changes in ocean currents

What can you infer about the rate of climate change based on the information provided about the Earth's average surface temperature?

• The rate of warming has been constant over the last century.
• The rate of warming has been increasing in recent decades.
• The rate of warming has been decreasing in recent decades.
• The rate of warming has been fluctuating without a clear trend.