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  2. Test tube - Wikipedia

    en.wikipedia.org/wiki/Test_tube

    Chemistry tubes are available in a multitude of lengths and widths, typically from 10 to 20 mm wide and 50 to 200 mm long. [1] The top often features a flared lip to aid pouring out the contents. A chemistry test tube typically has a flat bottom, a round bottom, or a conical bottom.

  3. Hummingbirds: Everything you need to know about feeders ... - AOL

    www.aol.com/hummingbirds-everything-know-feeders...

    Hummingbird feeders are a great way to attract and watch one of North America's favorite birds, but there are a few things you need to know. Hummingbirds: Everything you need to know about feeders ...

  4. Here, a ruby-throated hummingbird is at a feeder in 2016. What does the Ruby-throated hummingbird look like? Here’s what The Cornell Lab of Ornithology’s “All About Birds” website says:

  5. 10 of the Best Hummingbird Feeders to Entice Some ... - AOL

    www.aol.com/lifestyle/10-best-hummingbird...

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  6. Bird feeder - Wikipedia

    en.wikipedia.org/wiki/Bird_feeder

    Blue jay eating at a feeder Bird feeder in a garden. A birdfeeder, bird table, or tray feeder is a device placed outdoors to supply bird food to birds (bird feeding).The success of a bird feeder in attracting birds depends upon its placement and the kinds of foods offered, [1] as different species have different preferences.

  7. Shaker (laboratory) - Wikipedia

    en.wikipedia.org/wiki/Shaker_(laboratory)

    A shaker is a piece of laboratory equipment used to mix, blend, or agitate substances in a tube or flask by shaking them. It is mainly used in the fields of chemistry and biology . A shaker contains an oscillating board that is used to place the flasks, beakers , or test tubes.