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Item SB041001: The solid wood of a tree comes mostly from carbon dioxide gas molecules from the air.

A student says that a tree gets most of its mass through a series of chemical reactions that starts with a gas in the air and then makes the solid wood of the tree. Do you agree or disagree with him, and why?

I agree that the solid wood of a tree comes mostly from a gas in the air

  1. because the molecules that make up the solid wood of trees are made from glucose, and the carbon atoms in glucose come from carbon dioxide molecules in the air.
  2. because the molecules that make up the solid wood of trees are made from glucose, and the oxygen atoms in glucose come from oxygen molecules in the air.
  3. because trees grow by trapping gas inside the cells that make up the solid wood of the tree, which causes the wood to expand.

I disagree that the solid wood of a tree comes mostly from a gas in the air

  1. because a gas could never be massive enough to account for the mass of the solid wood of trees.
  2. because trees make their own food, which means that new atoms are made inside the trees so that they do not need to take in anything from the air.
  3. because non-living substances, such as the gasses that make up the air, cannot be transformed into parts of living things.
Distribution of Responses
Chart showing distrubtion of responses for Item ME041001
Points Earned
Group Correct Total Percent
Overall 82 352 23%
Grades
  6–8 82 352 23%
  9–12 N/A N/A N/A
Gender
  Male4619024%
  Female3616222%
Primary Language
  English7732524%
  Other52719%

View data table

Distribution of Responses
Chart showing distrubtion of responses for Item ME041001
Points Earned
Group Correct Total Percent
Overall 170 341 50%
Grades
  6–8 170 341 50%
  9–12 N/A N/A N/A
Gender
  Male9418052%
  Female7616147%
Primary Language
  English16131551%
  Other92635%

View data table