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Mystery Seed of the Week 243

March 31, 2015 / / 4 Comments

Last week Karen left a comment that it is difficult to tell how big the mystery seeds are without some sense of scale.

Adding scale to the seed photographs is something I have struggled with for a long time. Macro photography requires a narrow depth of field, which limits the area in focus. Also, adding something like a penny or ruler rather wrecks any attempts at artistic composition.

Her question, however, finally sparked an answer for me. How about including a grain of rice?

mystery-seed-243-1

The rice is still out of focus, but it does give some scale. I don’t think it detracts too much, do you?

mystery-seed-243-2

By the way, these funny little seeds are from an Arizona native plant that started growing in our yard all on its own.

Do you recognize what plant these seeds are from? If you choose to, please leave a comment with your ideas.

Mystery Seed answers and new Mystery Seeds are posted on Tuesdays.

Edit:  the answer is now posted.

Seed of the Week: Black-eyed Susan

March 31, 2015 / / 0 Comments

Our mystery seeds last week were from black-eyed susan plants, Rudbeckia hirta.

Rudbeckia-Susan(Photo is in public domain from Wikimedia)

You probably have seen these cheery yellow-orange flowers with their chocolate brown centers. Black-eyed susan (also called brown-eyed susan) plants are native to widespread regions of North America. They have been taken into cultivation in many other areas as well.

rudbeckia-brown-eyed-susanWe found this lovely patch growing in a garden in Switzerland.

They grow as biennials or short-lived perennials, although they can be grown as annuals in some areas. They are fairly drought tolerant and relatively easy to grow from seeds.

Black-eyed susans are a wonderful choice for a native wildflower garden or prairie yard. See, for example, Alex Wild’s prairie yard in this post (scroll down). They are favorites of birds, bees and butterflies. In fact, black-eyed susans are larval host plants for at least two species of butterfly, so they would be wonderful additions to butterfly gardens as well.

Have you ever grown black-eyed susans?

A Place in Space and Star Cycles

March 27, 2015 / / 0 Comments

For STEM Friday we have a new e-book, A Place In Space, by Astronomer Sarah Willis.

In a clever linkage of ideas, a young girl and her cat take an imaginary trip into space (via telescope) to explore the Cat’s Paw Nebula and the Cat’s Eye Nebula.

As explained in “The Science Behind the Story” section in the back, these two real space objects with similar names actually represent two opposing stages in the life cycle of stars. In the Cat’s Paw Nebula, young stars are being formed in the swirling clouds. In the Cat’s Eye Nebula, a large star has exploded at the end of its life cycle. The explosion pushed out rings of gas and dust, which will eventually be the stuff of new stars and thus completing the cycle.

The rhyming text is probably most appropriate for early elementary-aged children. The illustrations are imaginative, but frankly not the professional quality you see in most picture books these days. Will children mind? I’m not sure.

The good news is that you can decide for yourself, because Sarah Willis is making A Place in Space available for free to download on Amazon today, March 27, 2015. She is also scheduling another free weekend for Astronomy Day on April 25, 2015.

Be sure to let us know what you think.

Related Activities:

1. Explore images of space objects at NASA and Amazing Space

Cats-eye-nebula-NASA(Cat’s Eye Nebula image from NASA)

 2. Shaving Cream Nebulae (plural form)

Model a nebula (singular form) by spraying a generous amount of shaving cream on a shower wall or bathroom mirror. Allow the child to swirl the nebula and form clumps (protostars and stars). Then the stars can “explode” to form a nebula again.

Note: Playing with shaving cream is a good pre-writing activity as well as introducing science vocabulary.

 

Disclosures: A .pdf copy of the book was provided by the author for review purposes. Also, I am an affiliate for Amazon. If you click through the linked titles or ads and make a purchase, I will receive a small commission at no extra charge to you. Proceeds will be used to maintain this self-hosted blog.

 

Come visit the STEM Friday blog each week to find more great Science, Technology, Engineering and Math books.

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