Question

1. according to the passage, which of the following is a natural factor that has historically caused climate change on earth? a. increased levels of carbon dioxide in the atmosphere b. deforestation for agricultural purposes c. the burning of fossil fuels for energy d. changes in the earth’s orbit around the sun 2. the passage mentions that scientists use ice cores to study past climate changes. what information can be gathered from analyzing ice cores? a. the composition of volcanic ash deposits b. records of past atmospheric conditions, including co2 levels and temperatures c. the rate of tectonic plate movement d. the migration patterns of ancient animal species 3. what does the intergovernmental panel on climate change (ipcc) conclude about the cause of the current warming trend? a. human influence has unequivocally warmed the atmosphere, ocean, and land. b. volcanic activity is the main contributor to rising global temperatures. c. changes in earth’s orbit are the most significant factor. d. natural climate variability is the primary driver of current warming 4. the passage mentions several methods scientists use to study past climate changes. which of the following is not mentioned as a source of information about earth’s past

Explanation:

1. Question 1: Increased CO2 levels (A), deforestation (B), and burning of fossil fuels (C) are human - caused factors. Earth's orbital changes are a natural factor for climate change.
2. Question 2: Ice cores can provide records of past atmospheric conditions like CO2 levels and temperatures as air bubbles and chemical compositions are trapped in ice over time.
3. Question 3: The IPCC concludes that human influence has unequivocally warmed the atmosphere, ocean, and land.

Answer:

1. D. Changes in the Earth’s orbit around the sun
2. B. Records of past atmospheric conditions, including CO2 levels and temperatures
3. A. Human influence has unequivocally warmed the atmosphere, ocean, and land.