Have Seeds, Will Travel (2024)

Have Seeds, Will Travel (Adapted Project Learning Tree Lesson): A plant is a biological system. Its systems, processes, and components enable it to grow and reproduce. By observing, collecting, and classifying seeds, students are introduced to one aspect of a plant’s reproductive system.

Materials:

  • A variety of seeds
  • Cups or containers (optional)

Background: For a seed to germinate and grow into a mature plant, environmental conditions must be just right.

  • If a seed drops from the parent plant, it might compete with the parents for essential resources and have difficulty growing. Therefore, most seed-bearing plants have developed a way to disperse seeds (and or fruits) away from the parent, giving the new plant a better chance to find what it needs to grow.
  • Some plants rely on wind for seed dispersal, many plants depend on animals for seed dispersal, some even eject their seeds away from their parent plant.

What to do:

  1. Go out and collect numerous seeds. They can be bird seeds, seeds from the kitchen, or gathered from the outdoors.
  2. Closely examine your seeds and come up with a system for classifying them.
  3. Write down different ways the seeds are dispersed. Here are some example categories of seed dispersal:
    • Floats in the air – dandelion, cottonwood, milkweed
    • Flies through the air – maple, ash, tulip, poplar
    • Floats on water – mangrove, cranberry
    • Bounces or rolls – acorn, tumbleweed (whole plant rolls)
    • Eaten by animals – cherry, peach
    • Stored by animals – acorn, beech, hickory
    • Sticks to animals – burdock, Queen Anne’s lace
    • Thrown – locust, lupine, witch hazel
  4. Group your seeds according to dispersal categories.
  5. Answer some of the following questions:
    • How do seed’s shape and size affect dispersal?
    • What other parts of the plant help it to reproduce?
    • Why is it important for seeds to be dispersed in different ways?
    • How far can seeds be dispersed? (seeds can glide on the wind for several miles, float on water for hundreds of miles, or travel with a bird for thousands of miles.)
    • Can some seeds go further than others? How is distance important? (reduces competition for a plant’s needs in a particular area. Widespread plants increase species’ chances of survival.)
    • What value might seed dispersal have for plants, wildlife, and humans?

Enrichment:

  • Plant some of the seeds you collected so you can observe plant germination.
  • Design your own seeds with specialized dispersal mechanisms (you can use toothpicks, cotton balls, string, rubber bands, and add these to collected seeds to make a new seed design.)
  • Drop seeds in front of a fan and note differences in movement, direction, speed, and rotation. You can graph the distance each seed traveled.
  • Not all plants reproduce from seeds. Research to find out about other plants (ferns, mosses) and other species (fungi, algae) that don’t bear seeds and generally use spores or buds. Compare the reproductive system of such species to those of seed bearing plants.
Have Seeds, Will Travel (2024)

FAQs

Why do seeds have a need to travel? ›

Few seeds would grow if they could not be carried away from the parent plant. A seed that isn't dispersed and falls near its parent can be shaded and may not have sufficient nutrients from the soil. Some parent plants can actually produce chemicals that prevent any plants from growing too close to them.

How do seeds travel lesson plan? ›

Ask students to choose one of the seeds they found and complete the following tasks in their journal: Describe the seed using words and pictures. Identify the part(s) of the seed that help it move by wind, animals, or water. Make a claim about how the seed is moved and support the claim with evidence.

What is seed dispersal question answer? ›

Dispersal is the mechanism by which plant seeds are transported to new sites for germination.

What is it called when seeds travel? ›

Go for a walk and explore how seeds get around. This is called seed dispersal, and plants have several really neat methods of getting their seeds out in the wild. The methods of seed dispersal are: Gravity. Wind.

How can seeds travel? ›

Seeds travel in five main ways: by wind, gravity, water, and animals, and ballistically. Plants often rely upon one of these methods, but they can be combined.

Why do seeds need to move? ›

To become a plant, a seed has to travel. That is because seeds need room to grow. A seed has to be far enough away from other plants so that it gets the sunlight and water it needs. If a seed falls to the ground too close to its parent plant, it may not grow.

Why must seeds travel instead of growing right where they are? ›

Seeds must travel far enough away from other plants that they won't have too much competition for space, light, water, nutrients, and other things they need grow. This is called seed dispersal.

Why is it important for a seed to travel away from its parent plant? ›

If plants grow too closely together, they have to compete for light, water and nutrients from the soil. Seed dispersal allows plants to spread out from a wide area and avoid competing with one another for the same resources.

What are the 5 main methods of seed dispersal? ›

These include:
  • Seed Dispersal by Wind. The wind is the natural and fundamental means of seed dispersal in the plant kingdom. ...
  • Seed Dispersal by Water. In this method of seed dispersal, seeds float away from their parent plant. ...
  • Seed Dispersal by Animal and Birds. ...
  • Seed Dispersal by Gravity. ...
  • Seed Dispersal by Explosions.

Why should seeds be dispersed? ›

Seed dispersal promotes the survival of plant species. It allows plants to unfold in an extensive area. Thus, preventing plants from competing for light, water, and nutrients from the soil, which occurs when plants grow closer to each other.

How can people disperse seeds? ›

Humans may disperse seeds by many various means and some surprisingly high distances have been repeatedly measured. Examples are: dispersal on human clothes (up to 250 m), on shoes (up to 5 km), or by cars (regularly ~ 250 m, singles cases > 100 km).

How are seeds dispersed for kids? ›

Seeds have one simple job: to make a new plant. Seed dispersion is the way seeds are carried or spread to other places. Depending on the type of seed, they can travel by way of wind or water, or by attaching themselves to animals or humans (burs).

How are seeds dispersed by wind? ›

Wind dispersal

Some plants, like kauri and maple trees, have 'winged' seeds. They don't float away but flutter to the ground. With wind dispersal, the seeds are simply blown about and land in all kinds of places.

How do seeds spread? ›

Because plants cannot walk around and take their seeds to other places, they have developed other methods to disperse (move) their seeds. The most common methods are wind, water, animals, explosion and fire.

Why do seeds need to spread out? ›

Dispersal of seeds is very important for the survival of plant species. If plants grow too closely together, they have to compete for light, water and nutrients from the soil. Seed dispersal allows plants to spread out from a wide area and avoid competing with one another for the same resources.

Why do seeds need to be spread? ›

Most plants grow from seeds (baby plants covered in a protective coating). To prevent the possibility of parent plants competing with their offspring for the same resources—including sunlight, water, and nutrients from the soil—plants spread their seeds over a wide area.

Why do seeds need to be carried away from a plant? ›

Dispersal reduces competition among offspring and between offspring and parents. Dispersal also increases the chance that a species can colonize new habitats. Dormancy allows seedlings to emerge under optimal environmental conditions, avoiding harsh seasonal or unpredictable conditions.

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