Air+Temperature

Ryan and Cole's Plant Investigation

The Problem: How do plants respond to variation in air temperatures?

Hypothesis R: My guess is that the plants will not grow in intense heat or when it is chilled because plant usually cannot grow in places like the desert or Antarctica. I also guess that the one in regular conditions will. C: I  think that the room temp one will grow the most while the hot one will grow the second most and the cold one will grow the least. This is because green houses heat up plants and make them grow even thought experiment may be hotter. Normal plants grow fine and plants die in winter.

Procedure: 1. Fill 3 Styrofoam cups equally full of dirt. 2. Plant one seed in each cup 4cm deep. 3. Place in three separate locations. 4. Put a fan by one for one hour each day, a blow dryer by another for one hour each day and leave the other alone. 5. Place each plant under a plastic container after required chilling or heating is done. 6. Record observations every few days.

Materials: Blow dryer, Fan, 3 Styrofoam cups, 3 seeds, 3 plastic containers, Water and soil.

Variables: a. Manipulated: _Air temperatures b. Responding: Plant color and height. c. Controlled: Water amount, Soil amount, Cup size, Location, Amount of light.

Observations/Logbook: Day 1: Date:_October 5, 2009_ Planted seeds today Day 2: Date: _October 2, 2009 _ Plants have not yet emerged from soil. No visible growth in hot air, room temp, or cold air. Day 3: Date:_October 8, 2009_ Same as October second no sign of growth in hot air,room temp, or cold air. _ Day 4: Date: _October 12, 2009_ No visible growth in all plants same as last 2 ob's Day 5: Date: _October 14, 2009_ Plants Cold and Room Temp show no sign of growth but Hot sprouted today! no rulers at my house to measure it. Day 6: Date: _October 17, 2009_ Plants Cold and Room Temp show no sign of growth and Hot is growing very fast it has curved to the side of the cup and leaves are starting to form no rulers at my house to measure it. Day 7: Date: _October 19, 2009_ Cold and Room Temp show no sign of growth but hot has a thick stem and is 5.5 cm tall also it is 0.5 cm thick. Day 8:-October 27,2009_ hot has grown three leaves and is still bent to one side. It is 7.5 cm tall and is 0.6 cm thick it has three leaves the longest of which is 4.5 cm long Day 9: Date: _November 2, 2009 Everything is almost the same as last ob's except it is now 10cm tall and some one ripped its leaf! Day 10 Date: November 13 2009: Heat is now dead unfortunately and Cold and regular have still not sprouted.