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VOCABULARY
Transpiration- the process by which water is given off from plants
through evaporation
Variable- what you change in an experiment (what you are testing!)
Control- the standard to which an experiment is compared; it is not
subjected to the variable (the change)
Controlled Experiment- only one variable is being tested
Xylem- the tube-like structures that carry water from the roots
throughout the plant
Stomates- pores or holes in the leaves that open and close to regulate the
amount of water passing out of the plant
Guard Cells- control the size of the openings on leaves
QUESTIONS TO THINK ABOUT
1. What are the openings on the leaves that let gases in and out? Why
does a plant need these openings?
2. What controls the size of the openings on these leaves?
3. Why is the transpiration process so important to a plant?
4. Describe the process of transpiration in detail from how water
enters the plant all the way to how it leaves the plant. (think about
roots, vascular channels, xylem, and stomates)
5. During a drought, would you expect a plant to pass a lot of water
through the stomates? Why or why not?
VOCABULARY
• Ovary- where seeds develop
• Ovules- tiny preseeds in the ovary
• Pistil- center of the flower, ovary is located at the base (female
part)
• Egg- female sex cell in the ovule
• Fertilized- ovule joins with sperm to create an egg (embryo)
• Sperm- male sex cell located in pollen grain
• Pollen grain- contains the sperm cell
• Anthers- produces the pollen grains, located at the end of the
stamen
• Pollination- the process by which pollen gets from the male anther
to the female pistil and down to the egg
• Stigma- sticky tip of the pistil
• Pollen tube- grows from pollen grain the length of the pistil.
QUESTIONS TO THINK ABOUT
6. Describe the pollination process and tell why it is important.
7. What is the purpose of flowers?
8. What is sexual reproduction in plants?
9. What is a pollinator and can you name 5 of them?
10.
What are the seed-dispersal methods plants use to spread
seeds around?
11.
Why is it important for seeds to be able to move away from
the parent plant?
12.
Label all the parts of the flower on the back of this sheet and
be able to tell the function of each (what each does).