[Campbell Biology P.99] Based on the provided text and Figure 3.10, which of the following ... | Practice Question

Based on the provided text and Figure 3.10, which of the following observations or studies support the conclusion that liquid water is present or was recently present on Mars? Select all that apply.

  • A: Images from spacecraft sent to Mars showing ice present just under the surface.
  • B: Dark streaks that run downhill during the summer, associated with hydrated salts.
  • C: A radar study in 2018 concluding there is a large reservoir of liquid water one mile below surface ice.
  • D: Existence of enough water vapor in the atmosphere for frost to form.

Explanation

The text explicitly states that 'in 2015, scientists found evidence of water flowing on Mars Figure 3.10 ,' and the caption for Figure 3.10 mentions 'dark streaks that run downhill' and 'hydrated salts, indicating water is present.' Additionally, the text notes 'a study using radar in 2018 concluded there is a large reservoir of liquid water one mile below surface ice.' These two points directly support the conclusion of liquid water on Mars.