Gravitropism Corn Lab: Effects of Gravity on Corn Seeds Procedure: 1. Label the outside bottom petri dish with your name using a wet erase marker. 2. Crumple a dampened paper towel inside the bottom portion of a petri dish. The paper towel should be crumpled but spread throughout the whole dish. 3. Place 4 corn seeds in four different directions as shown in the “before diagram” below. 4. Secure the petri dish closed with the lid and a piece of clear tape as shown by the teacher. 5. Set the petri dish upright and make observations of the results as seeds germinate.

Hypothesis: Predict how you think gravity will affect root and shoot growth of each corn seed. (Complete a sketch to illustrate your hypothesis) Before (leave blank)

Hypothesis (sketch below)

Results: Describe the growth direction of the roots and shoots for each of the four corn seeds. Seedling Direction of Growth of Growth of Results Pointed (white) Tip Roots Shoots 1 down 2 3 4

Root and Shoot Observation Observe all of the roots and any shoots with a magnifying lens. Draw and describe one root and one shoot observations. You do not need to describe direction, but focus on the structure and characteristics of the root. 1. Root Observation Sketch and Observation: 2. Shoot Observation Sketch and Observation: Conclusion: How did gravity affect root and shoot growth?

Gravitropism Corn Lab: Effects of Gravity on Corn Seeds Procedure: 1. Label the outside bottom petri dish with your name using a wet erase marker. 2. Crumple a dampened paper towel inside the bottom portion of a petri dish. The paper towel should be crumpled but spread throughout the whole dish. 3. Place 4 corn seeds in four different directions as shown in the “before diagram” below. 4. Secure the petri dish closed with the lid and a piece of clear tape as shown by the teacher. 5. Set the petri dish upright and make observations of the results as seeds germinate.

Hypothesis: Predict how you think gravity will affect root and shoot growth of each corn seed. (Complete a sketch to illustrate your hypothesis) Before (leave blank)

Hypothesis (sketch below)

Results: Describe the growth direction of the roots and shoots for each of the four corn seeds. Seedling Direction of Growth of Growth of Results Pointed (white) Tip Roots Shoots 1 down 2 3 4

Root and Shoot Observation Observe all of the roots and any shoots with a magnifying lens. Draw and describe one root and one shoot observations. You do not need to describe direction, but focus on the structure and characteristics of the root. 1. Root Observation Sketch and Observation: 2. Shoot Observation Sketch and Observation: Conclusion: How did gravity affect root and shoot growth?