Which statement best describes the flow of energy during photosynthesis in a plant? A. Stored energy is released from the plant as its sugars break down.

B. Energy moves from carbon dioxide molecules into the sugars in a plant.

C. Energy moves out of a plant as some of its sugars break down.

D. Light energy changes into energy stored in sugars made by a plant.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.