Explain how electrons produce light include the terms excited state, ground state, absorb energy, release energy, and photon

Light is a form of energy, and energy is neither created nor destroyed. Instead, energy can change from one type to another.This means that another type of energy is transformed into visible light.

Regardless of the source of energy, light is produced in basically two steps:

1. An atom’s electron absorbs energy and becomes energized, or excited. When this happens, the excited electron moves from its ground state (normal position around the nucleus) to an excited state (position farther from the nucleus.2. The excited electron emits the energizing energy as photons of visible light. The bow de-energized electron returns to is ground state, which is its normal distance from the nucleus.

For the light production to be continuous instead of just a light flash, the energizing source of energy must be continuous.

If heat is the original source of energizing energy, the light produced is called incandescent light.

If the original energy source is not heat, then the light produced is called luminescent light, also called “cold light.”

1. the question asks the most appropriate, which seems to rule out "all of the above." your choice appears to be the correct one.

2. the protocol described is good for identifying correlation, but not cause and effect. for cause/effect, you need to devise a protocol that will assign the treatment (or not) to groups that have essentially the same "demographics" with respect to all the other variables. your choice regarding control group seems appropriate. random assignment of treatment (choice d) may be appropriate also. (i think you can argue that b and d are just different descriptions of the same method.)

3. d will randomize the birds, but may not guarantee there are 10 in each group. e will do both, so seems the better choice.

comment on question 2

based on the problem statement, it seems clear that confident, attentive drivers are more likely to use daytime running lights. so, the protocol might need to be devised in such a way that the lights would be turned on or off without the driver's knowledge. (an attentive driver will figure it out.) assigning a confident, attentive driver to a group required to drive without running lights might mess with his/her confidence and attentiveness. you don't want your experiment to do that. (nor do you want the experiment to subject a driver to greater risk of accident as a consequence of driving without running lights.) experiments involving human safety are always problematic.

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying