Curious Minds

40 Hands-on Activities to Inspire a Love of Learning

Ty Kolstedt, Dr. Azeem Z. Vasi

• Editorial: Zephyr Press
• Año: 2016
• ISBN:
  9781613731536
• Edición: 1
• Categoría: Education
• Categoría: Education Teaching Methods

A great resource for parents and homeschoolers in search of kid-friendly DIY projects, educators seeking to enhance classroom lessons, and caregivers or camp counselors looking for activities with a deeper educational lesson behind them, Curious Minds is filled to the brim with learning activities that will excite the eager, gifted child just as much as the special needs learner. Through 40 fun projects designed to promote kids' critical thinking about the interest in the world they live in, Curious Minds fosters active "learning by doing" in four core academic areas—math, science, social studies, and language arts. Each activity includes a short mini-lesson and list of "related lingo" to provide educational background information; a simple materials list; easy-to-follow, illustrated instructions; and guidance for extending the activity. The wide range of projects ensures every child's interest will be piqued. Kids will make homemade butter like the pioneers did; understand viscosity by making homemade quicksand; learn to recognize and use creative writing techniques; make their own ink using natural resources; and much more!

PART I

PHYSICS & MATH

SHOOT! MINE DIDN’T OPEN: THE SCIENCE OF PARACHUTES

Content Focus: Physics

Primary Skills Focus: Design and Model

Mission Objective: Jump into the basics of air resistance with a brief history of parachute design. Then, construct multiple styles of parachutes and test the merits of each design.

If you take a feather and pea and drop them from the same height, which one falls faster? The pea, right? One of the reasons this is the case is air resistance. In this mission you will become an expert in air resistance and design your own parachutes.

The idea of the parachute has been around for hundreds of years. While some say the ancient Chinese used a parachute-like device to jump from heights and perform acrobatics, Leonardo Da Vinci created the first known drawings of a modern-style parachute in 1483. His design was a four-sided pyramid made of wood and canvas. In June 2006 Adrian Nicholas glided to the ground safely using a parachute based on a sketch Da Vinci did of his parachute design. The builders of Nicholas’s parachute only used materials that would have been available to Da Vinci during his life. Isn’t that cool?

Parachutes work because of air resistance. When a parachute is deployed (opened) there is drag, or air resistance, that pushes up the parachute and slows down the jumper. It is the parachute’s light weight and large surface area that harness the power of air resistance. It’s all about air molecules. A human without a parachute would fall fast because he or she would push through the air molecules very easily (like the pea). Air resistance is generated as the parachute runs into air molecules when hurling toward the Earth (like the feather). The force of all these air molecules pushing against the parachute slows its descent (drop).

After Da Vinci made his initial drawings in the 15th century, progress on the idea slowed and the parachute did not play a significant role until the early 20th century (or 1900s). Parachutes had lost the rigid frame and were now made of either nylon or silk. From the early 1900s to the 1960s parachutes had a circular design as shown here:

While these parachutes did get the traveler to the ground safely, the jumper didn’t have the ability to steer them. The parafoil parachute design created in the 1960s included that improvement. The parafoil design is a rectangular-shaped wing capable of being steered to where its passenger wants to land. Did you know that some competition jumpers can land within inches of a target?

Learning the Lingo

air molecules: The tiny, microscopic building blocks of nitrogen, oxygen, and carbon dioxide that make up the atmosphere around our planet.

descent: The movement down, or lower. In this case it refers to the parachute jumper’s fall to the ground.

drag: The air resistance that is created by an object falling. Typically, items with less mass and more surface area create more drag and fall slower.

parafoil: A parachute design developed in the 1960s that gave the jumper greater control and mobility. This is due to the rectangular design and air “pockets” that jumpers can steer with handles, or toggles. This design is still used today.

Materials

• 3 heavy trash bags
• 1 roll of tape
• 1 roll of string
• 50–75 Popsicle sticks
• Wood glue
• 3 plastic shopping bags
• 1 roll of paper towels
• 3 eggs

Plan of Attack

We know the parafoil parachute provides the jumper with the most mobility (the ability to steer), but which design (Da Vinci’s, a complete circle, or the parafoil) can land a jumper softest, and therefore safest?

1. Hypothesize (make your best educated guess) as to which design is safest. Why do you think that?

2. Use the trash bags, tape, string, and Popsicle sticks and glue to create three parachutes: a Da Vinci, a circular, and a parafoil. You will use the sticks and glue for the Da Vinci design but for the most part try to use the same amount of material for each parachute. You will want to reinforce the holes in the parachute corners where you tie your strings with small pieces of duct tape. The drag will put significant pressure on the bag and it may tear without reinforcement.

3. Use the plastic shopping bags to make a cradle for an egg to hang under the parachutes. Tie the parachute strings to the plastic shopping bag handle. At the bottom of the bag, use paper towels to cushion the egg.

4. Next, have an adult drop each egg/parachute combination. Try to drop them from an upstairs window, balcony, stairwell, or ladder. Your goal is to drop them from as high as possible to give the parachute the greatest opportunity to “catch” enough air resistance to guide the egg down.

5. What happened? Was your hypothesis correct?

6. Try putting a small hole in the middle of each parachute and see if that helps balance and smooth out th...