Brenda's Research

Research on production of CO2 relation to light color?

I've preformed 2 hours of individual research

Note : Since research was preformed separately similar research will be gathered y group

Information used to understand general concept of color and light

• Color of light is based on the wavelength as they go through the same medium
• with violet being the shortest wavelength at 400 nm (order: violet, blue, green,yellow orange red) and the longest wave length at 700 nm. as measured on the electromagnetic spectrum
• color of sunlight is white ( all colors on spectrum all wavelengths)
• “Objects appear different colours because they absorb some colours (wavelengths) and reflected or transmit other colours. The colours we see are the wavelengths that are reflected or transmitted.”
• Energy of a wavelength “The shortest wavelengths have the most energy because it has the highest frequency. A high energy light will have a shorter wavelength than a low energy light.“http://wiki.answers.com/Q/What_wavelength_possesses_the_greatest_energy_value

The Chemistry behind plant life

• chlorophyll is one of the pigments found in plants
• Chlorophyll absorbs certain wavelength of light
• chlorophyll  absorbs light in the the red and the blue regions of the spectrum. Green light is reflected making the color appear green
• photosynthesis takes place in the chlorophyll
• photosynthesis is what gives the plant energy to live it out the functions of  life
• photosynthesis is a chemical reaction from light energy to chemical energy

“Glucose can be used immediately to provide energy for metabolism or growth, or stored for use later by being converted to a starch polymer. The by-product oxygen is released into the air, and breathed in by plants and animals during respiration. Plants perform a vital role in replenishing the oxygen level in the atmosphere.”

“Chlorophyll absorbs so strongly that it can mask other less intense colours. Some of these more delicate colours (from molecules such as carotene and quercetin) are revealed when the chlorophyll molecule decays in the Autumn, and the woodlands turn red, orange, and golden brown.

Chlorophyll can also be damaged when vegetation is cooked, since the central Mg atom is replaced by hydrogen ions. This affects the energy levels within the molecule, causing its absorbance spectrum to alter. Thus cooked leaves change colour - often becoming a paler, insipid yellowy green.”

Douma, Michael, curator. "Green Plants and Chlorophyll" .Cause of Color. 2008. Institute for Dynamic Educational Development. retrieval 17 Aug.2014.

Kimball, John W., Dr. "Chlorophylls and Carotenoids." Chlorophyll. Users.rcn.com, 18 Feb. 2011. Web. 17 Aug. 2014.

Foundation, 2013. Web. 17 Aug. 2014.

Useful info for modifying experiment and possibly getting optimum results

Indoor lighting for plants why it works

• Common terms used “natural”, ”full spectrum”, “balanced” (more costly than usual incandescent bulbs or cool white tubes)
• “A less expensive solution for a balanced light quality is to use both incandescent and cool white lights, or cool and warm (appearance, not temperature) white tubes in fluorescent fixtures”
• Amount of light and and type/ wattage of bulb is important
• “”Incandescent and similar bulbs give off more heat, so need to be kept a foot or more above plants.”
• if leaves turn brown or edges burn means light is too close
• Light quantity and light duration are related, as a lower level of light often can be made up with a longer duration
• indoor foliage plants grow best between 70° and 80°F during the day and from 60° to 68°F at night
• “Most flowering indoor plants prefer the same daytime range, but grow best at nighttime temperatures from 55° to 60°F. The lower night temperature induces physiological recovery from moisture loss, intensifies flower color, and prolongs flower life
• . Many foliage plants will be damaged if the ambient temperature drops below 50°F. Some plant show chilling injury quickly, while other plants like dieffenbachia may not show the damage for several weeks.
• High temperatures speed up the normal living process of plants to a maximum rate at and above 90 degrees F. This means that most plants can take temperatures up to 90 degrees F. fairly well. Anything above that—the hotter it gets, the more they suffer! Of course, less tolerant or weaker plants suffer even more. The longer high temperatures persist, the greater the injury to the plant.

http://www.uvm.edu/pss/ppp/articles/lighting.html

http://www.ces.ncsu.edu/depts/hort/consumer/weather/temp-houseplants.html

Bibliography

Coltman, Amy, William Coltmant, and Ketta Williams. "Untitled Document."National Centre for Initial Teacher Training in Primary School Science. SciCentre, 10 Nov. 2000. Web. 17 Aug. 2014.

Douma, Michael, curator. "Green Plants and Chlorophyll" .Cause of Color. 2008. Institute for Dynamic Educational Development. retrieval 17 Aug.2014.

Kimball, John W., Dr. "Chlorophylls and Carotenoids." Chlorophyll. Users.rcn.com, 18 Feb. 2011. Web. 17 Aug. 2014.

Properties and Concepts of Light and Color." Properties and Concepts of Light and Color. N.p., n.d. Web. 17 Aug. 2014

University of California Santa Barbara School University Partnership. "UCSB Science Line Sqtest." UCSB Science Line Sqtest. National Science

United States. NASA. What Wavelength Goes With a Color? Curatot Jay Madigan. National Aeronautics and Space Administration, 15 Nov. 2011. Web. 17 Aug. 2014.

Parson, Jerry. "PLANTanswers: Plant Answers How Hot Weather Effects Plants." PLANTanswers: Plant Answers How Hot Weather Effects Plants. Milberger's Gardening South Texas, Jan. 2003. Web. 17 Aug. 2014.

Evans, Erv. Temperature for Houseplants. Temperature for Houseplants. NC State University, n.d. Web. 17 Aug. 2014.