H. Activity Worksheet Questions
International Space Station Questions
1. Where is the International Space Station? ____________________________________
2. What year did humans begin living on the International Space
Station?__________________________________________________________________
3. Which is closer to Earth, the International Space Station or the
Moon?___________________________________________________________________
Plant Questions
4. Describe the differences between alfalfa and radish seeds.
 Size:__________________________________________________________________
 Shape:________________________________________________________________
 Color:________________________________________________________________
 Other:________________________________________________________________
5. How is the environment of your classroom different from the International Space
Station?
 Light_________________________________________________________________
 Temperature__________________________________________________________
 Gravity_______________________________________________________________.
 Other:________________________________________________________________
6. Does the environment effect how the plants grow on Earth? Describe an example.
_________________________________________________________________________
_________________________________________________________________________
7. Did the seeds germinate in space?
_________________________________________________________________________
8. How does gravity affect plant growth?
_________________________________________________________________________
_________________________________________________________________________
_________________________________________________________________________
9. Which plants grew faster, the seedlings in space or the seedlings in your
classroom? _____________________________________________________
10. Label the diagrams
Name parts of a seed and seedling. See Diagram Below
 Root
 Shoot
 Hilum
 Cotyledon (leaf)
 Stem
Figure 1A. Diagram of a seed.
Figure 1B. Diagram of a seed just after germination.
Name parts of a plant. See Diagram Below
 Flower
 Stem
 Roots
 Leaf
 Fruit
H. Activity Worksheet Questions (with answers)
Teacher’s Copy
International Space Station Questions
1.
Where is the International Space Station? The International Space Station orbits around the
earth at an altitude of approximately 220 miles from the Earth. miles)
2.
What year did humans begin living on the International Space Station? Astronauts
and Cosmonauts began living on the ISS in 2000.
3.
Which is closer to Earth, the International Space Station or the Moon? The Moon is
about 250,000 miles (384,400 kilometers) from Earth and the International Space Station is only 220
miles away from Earth, so it is closer.
Plant Questions
4.
Describe the differences between alfalfa and radish seeds.
 Size: Radish seeds are larger then alfalfa seeds.
 Shape: Radish seeds are round while alfalfa seeds are kidney shaped.
 Color: Radish seeds are a rusty brown color and alfalfa seeds are a amber or yellowish in
color.
5. How is the environment of your classroom different from the plant chamber on the
International Space Station?
 Light: The plant chamber on the ISS will have regulated light. Grow lights will be on for
twelve hours and then off for twelve hours. Light in the classroom may come from both the
ceiling lights and the sun.

Temperature: While the temperature on the ISS can be manipulated, it is generally kept at
at room temperature, similar to a classroom environment.

Gravity: The international space station is a “micro-gravity” environment; things inside the
International Space Station are free falling so in essence they are floating.
6.
Does the environment effect how the plants grow on Earth? Describe an example.
Yes, light, temperature and gravity affect how plants grow on Earth. For example plants are
affected by gravity because of gravitropism. This response makes stems grow up and roots grow
down. Plants in the dark lose their green color and become spindly.
7.
Did the seeds germinate in space? Yes, seeds do germinate in space.
8. How does gravity affect plant growth? Plants and seeds respond to gravity. Roots will
grow down towards gravity and stems grow away from gravity, which is up. Once germinated,
roots will orient themselves and grow down.
9. Which plants grew faster, the seedlings in space or the seedlings in your
classroom?
__________________________________________________________________
10. Label parts of a plant