How does temperature affect germination? By: Jessica, Ryan, & C.J.

Question? How does colder temperature affect the germination rate on a cord seed?

Hypothesis & prediction? I think that the colder temperature seeds (1- 6) will take a longer amount of time to germinate then the warmer temperature ones (7-12) My prediction is that the warmer temperature corn seeds will germinate a lot quicker then the colder ones because a warmer temperature is recognized by the plants more than the unusual colder temperature.

Research? Germination is the process when seeds begin to grow and sprout leaves and roots in a specialized amount of time. Water Is a need when it comes to germination. Our mentor had told us that a few adaptations for a seed is how it grows and how when certain types of seeds stick to your shoes or your dog that helps them to travel world wide!

More research: Our mentor told us that seeds often start out dry, and it would be better for us to put them in a moist environment before we start to germinate them. Because of that we soaked out seeds in a wet paper towel over night. She also told us that we have to watch very carefully, and the first sign to germination is the little roots sticking out.

Materials? 1) Petri dishes (2) 2) corn seeds (12) 3) eye dropper for water 4) data table (journal and online) 5) ice packs (1 transitioned) 6) plastic tub 7) plastic wrap 8) thermeter

Variables? Independent: the temperature (cold-60 degrees, warmer-71 degrees Dependent: amount of light Constant: amount of water put into each section of perti dish

Procedures? Procedures: 1) soaking the seed all night long 2) build our chambers that the seeds will grow in (petri dish) 3) after the chambers are completed, we will put the seeds in the chambers. 4) the seeds will be wrapped in a soaked paper towel, and we will have (2) seeds in each little section in the petri dish.(3 sections in each) 5) we will put on dish on a counter in the classroom so the temperature will be at room temperature. 6) the colder climate seeds (1-6) are in a plastic tub, and the dish is still sitting on an icepack, but we have a smaller icepack now. we put plastic wrap over the tub. 7) each day we will check both dishes once a day, in the morning. 8) each morning we will have to change the ice-packs to keep the cold temperature constant. 9) the room temperature dish will stay the same. 10) the light will be the same for each dish because we only want to change one thing at a time.

Data table: 1 60 D. 10.29.13 no 4cm. 61 11/6/2013 little 2 5cm. 6cm. 3 7 70 D. 73 a lot 14.5cm. 8 15cm. 16.5cm. 9 14cm. 16cm. 10 18cm. 11 15.5cm 12 8cm.

Analysis of data? By looking at our data I can see that by each day each seed has grown at least 1 cm per day. The warmer temperature ones have grown more than the colder temperature ones a day, although the colder have been growing rapidly. Seeds 1-6 were the colder ones and even though the ice pack would melt through out the night we still have changed it each morning, and they did stay at a controlled temperature most of the day. Seeds 7-12 were the warmer ones and defiantly stayed at a controlled room temperature through out each day.

Conclusion After all the test and information we found out that we supported our hypothesis, it came out correct. The colder seeds did in fact take a lot longer time to germinate fully then the warmer temperature seeds.

Resources: http://www.plantingscience.org/index.php? module=pagesetter&func=viewpub&tid=2&pi d=5309#comments https://www.google.com/#q=how+does+ger mination+work+on+corn+seeds%3F http://plantsinmotion.bio.indiana.edu/plant motion/earlygrowth/germination/corn/corng erm.html http://www.fastplants.org/pdf/activities/ho wdoesaseedgerm.pdf