Question

identify the pieces of evidence that indicate that liquid water once existed on mars. ice and debris flows appear to be cascading down the slopes of mars active volcanoes. martian rocks contain jarosite minerals believed to have formed in the presence of water. gully systems on the walls of impact craters were carved by melt water. parallel grooves on the channel floors appear to have been carved by raging waters.

Explanation:

• Ice and debris flows could be related to water - but Mars has no active volcanoes currently, so this is incorrect.
• Jarosite minerals form in water - indicates past water presence.
• Gully systems carved by melt - water implies liquid water existed.
• Grooves carved by raging waters show past water flow.

Answer:

• B. Martian rocks contain jarosite minerals believed to have formed in the presence of water.
• C. Gully systems on the walls of impact craters were carved by melt water.
• D. Parallel grooves on the channel floors appear to have been carved by raging waters.