When a branch or even a stem is cut from a deciduous tree, why do the leaves stay attached to stems? http://en.wikipedia.org/wiki/Abscission Special cells attach deciduous leaves to stems. In autumn, decreased sunlight triggers the production of chemicals that breakdown the walls of the attaching cells. This results in the leaves falling off of the […]
Chia Seeds: Black/White Size Measurement
The diagram shows the average length and width of black chia seeds to be respectively2.1 mm and 1.3 mm. Are white and black chia seeds the same size? Discover for Yourself Using a magnifying lens and a metric ruler, measure the millimeter length and width of at least 10 white chia seeds. Record each measurement […]
Chia Seeds: Physical Properties
Investigation of Physical Properties Objective: To observe and describe the physical properties of both dry and wet Chia seeds. Science Terms: hydration– to fill with waterphysical properties– Characteristics used to identify something; physical properties include: color, size, shape and texture.relative size- A comparison of the size of an object to something with a familiar size; as big […]
Growing Chia Seeds
Chia Planters These are forms made with the same clay as clay flower pots are made of . I wonder…Will chia seeds grow on pieces of clay pots? Let’s Find Out! Materialssmall bowl1/4 cup (63 mL) measuring cuptap water2 teaspoons (10mL) Chia seedscontainerbroken pottery pieces (nurseries might provide the broken pieces of clay pottery)misting bottle […]
Bird Feeder
I love to watch the birds flutter and prance around outside my office window. One of my bird feeders looks like a house and has a platform between the two end feeding containers. Every once in a while one of my cats manages to jump onto the platform and crouch down. She gives herself away […]
Formation of Conjoined Twins
Conjoined Twins are identical twins formed when the zygote splits but does not fully separate. Conjoined twins are classified according to the place on the body where the twins are connected. The model of the conjoined twins shown has two heads and one body. These twins are classified as dicephalus conjoined twins (twins with two […]
Formation of Identical Twins
Identical twins form when a zygote (egg/sperm combination) splits into two separate parts. In the diagram, 1n represents half of the chromosomes that you have in each cell. Thus, 2n represents the complete number of chromosomes. You have a total of 46 chromosome. 1n = 23 chromosomes 2n = 46 chromosomes While the two babies […]
Identical Twins: Monozygotic
The girls in the photo are examples of identical twins. The term identical twins refers to a type of twinning, and describes how they form, not what they look like. While the girls look identical, they are not clones. They have physical differences, such as their fingerprints, which may look identical, but the ridges are […]
Two Little Rascals Raise a Caterpillar
The Adventures of Two Little Rascals is a story in the making. The following English and Spanish dialog is from Evelyn, the mom of the Two Little Rascals. I hope you enjoy this Caterpillar Raising Saga as much as I did. Raising a Caterpillar *We found this caterpillar at home and we immediately made it […]
Maceration? Hydrophilic? Osmosis?
What does macerate mean? I now have a new word to add to my very limited vocabulary. While I found the word “macerate” in a cooking recipe, it so wonderfully describes what happens to slices of fresh apples when covered with sucrose (table sugar). Covering sliced fresh apples with table sugar causes the apples to […]
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