Question

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

chemical reaction

fossilization

ionic bonding

photosynthesis

2)Where is energy stored during photosynthesis?(1 point)

starch

valence electrons

chemical bonds

oxygen

3)Which characteristic do valence electrons indicate about reactions between atoms?(1 point)

bond number

absolute electronegativity

bond type

electronegativity difference

4)Which compound is a carbohydrate?(1 point)

HClO4

C4H12N2

Na2C2O4

C3H6O3

5)Why are iron oxides in rocks evidence for prehistoric photosynthesis?(1 point)

Iron oxides form when cyanobacteria produce oxygen via photosynthesis.

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

Iron oxides form when cyanobacteria use carbon dioxide for photosynthesis.

Iron oxides form when carbon dioxide, a reactant of photosynthesis, is in the atmosphere.

Answer 1

Answer:below

Step-by-step explanation:

1. Chemical reaction

2. Chemical bonds

3.bond number

4. C3H6O3

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