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Question 1

A)Which term describes the conversion of substances into different substances?(1 point)
Responses

fossilization
fossilization

ionic bonding
ionic bonding

photosynthesis
photosynthesis

chemical reaction
chemical reaction
Question 2
A)Where is energy stored during photosynthesis?(1 point)
Responses

oxygen
oxygen

valence electrons
valence electrons

carbon dioxide
carbon dioxide

chemical bonds
chemical bonds
Question 3
A)What can be predicted from the valence electrons of the elements in a compound formed by a reaction?(1 point)
Responses

bond type between the atoms
bond type between the atoms

absolute electronegativity of the atoms
absolute electronegativity of the atoms

number of bonds between the atoms
number of bonds between the atoms

electronegativity difference between the atoms
electronegativity difference between the atoms
Question 4
A)Which compound is a carbohydrate?(1 point)
Responses

Na2C2O4
Na 2 C 2 O 4

C3H6O3
C 3 H 6 O 3

C4H12N2
C 4 H 12 N 2

HClO4
HClO 4
Question 5
A)Why are iron oxides in rocks evidence for prehistoric photosynthesis?(1 point)
Responses

Iron oxides form when cyanobacteria use carbon dioxide for photosynthesis.
Iron oxides form when cyanobacteria use carbon dioxide for photosynthesis.

Iron oxides form when cyanobacteria produce oxygen via photosynthesis.
Iron oxides form when cyanobacteria produce oxygen via photosynthesis.

Iron oxides form when oxygen, a product of photosynthesis, is in the atmosphere.

1 answer

Here are the correct answers for each of your questions:

Question 1 A) Which term describes the conversion of substances into different substances?
Answer: chemical reaction

Question 2 A) Where is energy stored during photosynthesis?
Answer: chemical bonds

Question 3 A) What can be predicted from the valence electrons of the elements in a compound formed by a reaction?
Answer: bond type between the atoms

Question 4 A) Which compound is a carbohydrate?
Answer: C3H6O3

Question 5 A) Why are iron oxides in rocks evidence for prehistoric photosynthesis?
Answer: Iron oxides form when cyanobacteria produce oxygen via photosynthesis.

Feel free to reach out if you have any more questions or need further assistance!