Did You Know? The Mighty Water Bear

Water bears, also known as tardigrades, can survive boiling, freezing, the vacuum of space and years of dessication. Biologist Bob Goldstein, of the University of North Carolina Chapel Hill, describes water bears and explains why he studies them.

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Today’s Problem: Beans, Beans The Musical Fruit

jellybeans

There is a jar of jellybeans on Mr. Wallace’s Desk. He asked some students to guess the number of jellybeans in the jar.

Annie guessed 206, Bert guessed 197, Estella guessed 212 and Feliciano guessed 221.

Mr. Wallace told the students “No guesses were correct, but one guess was off by 4 jellybeans, one was off by 13 jellybeans, one was off by 11 jellybeans, and one was off by 2 jellybeans. I will give you extra credit if you can figure out the number of jellybeans now.”

What is the correct number of jellybeans?

Did You Know? Scient”ist”ic Units

Many units of measurement are named after scientists to recognize their work in their chosen fields.

Research each of these scientists and complete the table.

Scientist Unit What Unit Measures
Michael Faraday Farad Electrical capacitance
Georg Simon Ohm
Sir Isaac Newton
James Watt
James Prescott Joule
William Thomson Kelvin
Andre Marie Ampere
Anders Celsius
Madam Marie Curie
Blaise Pascal
Charles Augustin de Coulomb
Heinrich Hertz

Today’s Problem: Greener Pastures

pasture-fencing_0_0_2hfs

Materials needed: Paper and pencil.

Randomly place between 8 and 16 dots on a piece of paper. These will be your “fence posts.”

Next, draw “fences” between your fence posts to make several “pastures.” Make sure you use every fence post and that have lots of open space for your livestock. Also, make sure your fences don’t cross.

Count the number of fences and pastures. exm

Add the number of fence posts to the number of pastures and subtract the number of fences. Your answer should be the same as your classmates, even if they used a different number of fenceposts, drew a different number of fences and had a different number of pastures.

Using this fact (related to something called the Euler Characteristic), how many fences will a farmer need if he wants 5 pastures and uses 51 fence posts?

Did you know? When is a second not a second?


Most of us know that a second is a unit of time. There are sixty seconds in a minute and sixty minutes in a hour.

However, the term second is also a term used in measuring angles. Angles are usually measured in degrees. However, like most measurements, we can get very precise. Degrees are divided into 60 minutes (1 degree = 60 minutes) and minutes are further divided into seconds (1 minute = 60 seconds).

In mapping on a global scale, precise measurement is key. A difference of 1 second of longitude or latitude is over 100 feet (depending on terrain).

Did you know? Today is Pi Day

Today is the 14th day of the 3rd month or in shorthand 3/14.

Today is officially Pi Day in recognition of the first 3 digits of the value of π

π is defined by the ratio of the circumference of any circle to its diameter.

Watch this interesting video about π

Did you know? The 13th Element

aluminum
Aluminum is the 13th element on the periodic table.

Aluminum is abundant in the earth’s crust (8% by weight), but mainly occurs in the form of aluminum oxide.

Research the properties of aluminum and provide some examples of everyday use.