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  1. Canada Thistle (Cirsum arvense)

    https://pested.osu.edu/node/397

    levels such as stream bank sedge meadows. It can also be found in clay to gravely soils. Flower: Lavender ... thistle is a highly invasive thistle that prevents the coexistence of other plant species through shading, ... competition for soil resources, and possibly through the release of chemical toxins poisonous to other plants. ...

  2. Camera Obscura (Pinhole Camera)

    https://ohio4h.org/camera-obscura

    (INTERMEDIATE to ADVANCED level) |  PDF for PRINTING NOTE: It is never safe to look at the sun without proper ... sun during a total solar eclipse. A total solar eclipse occurs when the moon passes between the sun ... tracing paper should be between the tubes. The aluminum foil should face out. Using the pushpin, gently ...

  3. Apple of Peru (Nicandra phyhsalodes)

    https://pested.osu.edu/node/396

    in the soil due to seed dormancy. Very competitive with soybeans and vegetable crops also has a low ...

  4. Hairy white top or ballcress (Lepidium appelianum)

    https://pested.osu.edu/node/421

    Prefers alkaline soils Flower: Clustered white flowers in racemes made up of 20-30 flowers Fruit: Inflated ...

  5. Solar Eclipse Shadow Play

    https://ohio4h.org/solar-eclipse-shadow-play

    ADVANCED level) |  PDF for PRINTING When a total solar eclipse occurs, some places will be completely engulfed in ... Point light source       Extended light source         Differences in shadows between a point light ... distinguish between the rays coming from the two sources. In Figure 1, light rays from both sources are ...

  6. Kochia (Bassia scoparia)

    https://pested.osu.edu/node/403

    above. The problem is…. animal health. Kochia can accumulate high nitrate concentrations under certain ...

  7. Poison hemlock (Conium maculatum)

    https://pested.osu.edu/node/409

    Habitat: Grows in dry to most soils and is often found near roadsides. Field borders, hiking trails, ... however, the seeds contain the highest concentration of poison. It contains highly poisonous alkaloids ...

  8. Being a Naturalist in the 21st Century: Perspectives from the Field

    https://ocvn.osu.edu/events/being-naturalist-21st-century-perspectives-field

    to bridge the gap between nature and mental health. She demonstrates a profound commitment to ...

  9. Small Moon, Big Sun 1

    https://ohio4h.org/small-moon-big-sun-beginning

    a small moon cover the big sun during an eclipse? The answer is in the distance between Earth and the sun ... evidence to decide what will happen next. ratio. A number that shows the relationship between two amounts. ...

  10. New Hire Announcement – Welcome, Dr. Eugene Law

    https://hcs.osu.edu/news/welcome-dr-law

    finishes up his time as a Postdoctoral Researcher with the University of Delaware Department of Plant and Soil ... high-impact responsibilities & we could not be happier to bring Dr. Law on board for this exciting ...

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