QuestionMay 11, 2025

Question 19 (Mandatory) (3 points) Which of the following is false? a Bedrock outcrop which has a sandblasted shape is a haboob sand size material moves by the process of saltation in the 6th half-life of radioactive decay, 96.87% of the daughter material is available much of the loess is made or created from rock flour that melted out of the ice sheets during the last ice age ) in the desert, the number one agent of erosion is wind

Question 19 (Mandatory) (3 points) Which of the following is false? a Bedrock outcrop which has a sandblasted shape is a haboob sand size material moves by the process of saltation in the 6th half-life of radioactive decay, 96.87% of the daughter material is available much of the loess is made or created from rock flour that melted out of the ice sheets during the last ice age ) in the desert, the number one agent of erosion is wind
Question 19 (Mandatory) (3 points)
Which of the following is false?
a Bedrock outcrop which has a sandblasted shape is a haboob
sand size material moves by the process of saltation
in the 6th half-life of radioactive decay, 96.87%  of the daughter material is
available
much of the loess is made or created from rock flour that melted out of the ice
sheets during the last ice age
) in the desert, the number one agent of erosion is wind

Solution
4.6(383 votes)

Answer

The false statements are: **(a) and (e)**. Explanation 1. Analyze each statement 1. **"A bedrock outcrop which has a sandblasted shape is a haboob"**: False. A "haboob" refers to an intense dust storm, not a sandblasted rock shape. 2. **"Sand size material moves by the process of saltation"**: True. Saltation describes the bouncing movement of sand grains in wind or water. 3. **"In the 6th half-life of radioactive decay, 96.87\% of the daughter material is available"**: True. After 6 half-lives, approximately 1 - (1/2)^6 = 0.96875 \approx 96.87\% of the original material has decayed into daughter material. 4. **"Much of the loess is made or created from rock flour that melted out of the ice sheets during the last ice age"**: True. Loess deposits are often formed from fine glacial sediments like rock flour. 5. **"In the desert, the number one agent of erosion is wind"**: False. Water, even in deserts, is the primary agent of erosion.

Explanation

1. Analyze each statement<br /> <br />1. **"A bedrock outcrop which has a sandblasted shape is a haboob"**: False. A "haboob" refers to an intense dust storm, not a sandblasted rock shape.<br />2. **"Sand size material moves by the process of saltation"**: True. Saltation describes the bouncing movement of sand grains in wind or water.<br />3. **"In the 6th half-life of radioactive decay, $96.87\%$ of the daughter material is available"**: True. After 6 half-lives, approximately $1 - (1/2)^6 = 0.96875 \approx 96.87\%$ of the original material has decayed into daughter material.<br />4. **"Much of the loess is made or created from rock flour that melted out of the ice sheets during the last ice age"**: True. Loess deposits are often formed from fine glacial sediments like rock flour.<br />5. **"In the desert, the number one agent of erosion is wind"**: False. Water, even in deserts, is the primary agent of erosion.
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