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The classic egg drop experiment gets reinvented as a driving question for physics students to explore a real-world problem.

By Suzie Boss
July 26, 2018
When a teenager climbs atop his desk and drops an object to the floor, teacher Johnny Devine doesn’t object. Far from it—he’s as eager as the rest of the class to see what happens next.

In a split second, the student and his teammates get positive feedback for the object they have cobbled together by hand. A small parachute made of plastic and held in place with duct tape opens as planned, slowing the descent and easing the cargo to a safe landing. Students exchange quick smiles of satisfaction as they record data. Their mission isn’t accomplished yet, but today’s test run brings them one step closer to success as aspiring aerospace engineers.



To boost engagement in challenging science content, Devine has his students tackle the same problems that professional scientists and engineers wrestle with. “Right away, they know that what they are learning can be applied to an actual career,” Devine says. “Students are motivated because it’s a real task.”

From the start of Mission to Mars, students know that expert engineers from local aerospace companies will evaluate their final working models of Mars landing devices. Their models will have to reflect the students’ best thinking about how to get a payload from orbit onto the surface of the Red Planet without damaging the goods inside. While real Mars landings involve multimillion-dollar equipment, students’ launchers will carry four fragile eggs.

THE ROAD MAP

Although the project gives students considerable freedom, it unfolds through a series of carefully designed stages, each focused on specific learning goals. Having a detailed project plan “creates a roadmap,” Devine explains, “for the students to really track their progress and see how what they’re learning connects back to the guiding question: How can we successfully land a rover on Mars?”

©George Lucas Educational Foundation

Before introducing technical content, Devine wants students to visualize what space scientists actually do. By watching videos of engineers who design entry, descent, and landing systems for spacecraft, students start getting into character for the work ahead.

Devine introduces a series of hands-on activities as the project unfolds to help students put physics concepts into action. They learn about air resistance, for instance, by experimenting with parachute designs and wrestling with a real challenge: How will they slow their landers to a reasonable speed for entry into the thin Martian atmosphere?

To apply the concept of change in momentum, students design airbag systems to go on the bottom of their landers—a location aptly called the crumple zone. They experiment with bubble wrap and other materials as potential cushioners for their cargo.

As the grand finale approaches, students keep using what they learn to test, analyze, and modify their designs. “You have to repeat the equations with different trials,” one student explains. “Being able to use that math over and over again helps it stick.”

Much of the hands-on learning in this PBL classroom “might look like a traditional physics lab,” Devine acknowledges, with students learning concepts through inquiry investigations. What’s different is the teacher’s ongoing reminder “to make sure students stay in character” as systems engineers. Each lab investigation relates back to their driving question and creates more opportunities for Devine to ask probing questions and formatively assess his students’ understanding. “We do a lot of framing in and framing out after each of those lessons so students have the chance to reflect and connect it back,” the teacher explains.

EXPERT CONVERSATIONS

When it is finally time for students to launch their precious cargo off a second-story landing, engineers from local aerospace companies are standing by to assess results. How many eggs in each lander will survive the fall?

Even more important than the test data are the discussions between experts and students. One engineer, for instance, asks to see earlier versions of a team’s design and hear about the tests that led to modifications. A student named Elizabeth perks up when she hears engineers using the same technical vocabulary that she and her classmates have learned. “It was kind of a connection—this is actually a thing that goes on,” she says.

“They had really deep, meaningful conversations so that students could practice communicating their justification for their designs,” Devine says. Hearing them use academic language and apply physics concepts tells the teacher that students deeply understand the science behind their designs. “At the end of the day, that’s what I’m most concerned about,” he says.

https://youtu.be/bKc2shFqLao


 

Regardless of your version of true happiness, living a happier, more satisfied life is within reach. A few tweaks to your regular habits like getting more sleep and exercise can help you get there.
Daily habits
The following daily habits may help you achieve more happiness in your life.
1. Smile
You tend to smile when you’re happy. But it’s actually a two-way street.
We smile because we’re happy, and smiling causes the brain to release dopamine, which makes us happier.
While not completely foolproof, researchers have found that the link between smiling and happiness could be attributed to the “facial feedback hypothesis,” where facial expressions may have a modest influence on emotions.
That does not mean you have to go around with a fake smile plastered on your face all the time. But the next time you find yourself feeling low, crack a smile and see what happens. Or try starting each morning by smiling at yourself in the mirror.
2. Exercise
Exercise isn’t just for your body. Regular exercise can help reduce stress, feelings of anxiety, and symptoms of depression while boosting self-esteem and happiness.
Even a small amount of physical activity can make a difference. You don’t have to train for a triathlon or scale a cliff — unless that’s what makes you happy, of course.
The trick is to not overexert yourself. If you suddenly throw yourself into a strenuous routine, you may just end up frustrated (and sore).
Consider these exercise starters:

Take a walk around the block every night after dinner.
Sign up for a beginner’s class in yoga or tai chi.
Start your day with 5 minutes of stretching.

Remind yourself of any fun activities you once enjoyed but that have fallen by the wayside. Or you could consider starting activities you always wanted to try, such as golf, bowling, or dancing.
3. Get plenty of sleep
Most adults need at least 7 hoursTrusted Source of sleep every night. If you find yourself fighting the urge to nap during the day or just generally feel like you’re in a fog, your body may be telling you it needs more rest.
No matter how much our modern society steers us toward less sleep, we know that adequate sleep is vitalTrusted Source to good health, brain function, and emotional well-being. Getting enough sleep also reduces your riskTrusted Source of developing certain chronic illnesses, such as heart disease, depression, and diabetes.
Here are a few tips to help you build a better sleep routine:

Write down how many hours of sleep you get each night and how rested you feel. After a week, you should have a better idea how you’re doing. You can also try using an app to track your sleep.
Go to bed and wake up at the same time every day, including on weekends.
Reserve the hour before bed as quiet time. Take a bath, read, or do something relaxing. Avoid heavy eating and drinking.
Keep your bedroom dark, cool, and quiet.
Invest in some good bedding.
If you have to take a nap, try limiting it to 20 minutes.

If you consistently have problems sleeping, consider talking with a doctor. You may have a sleep disorder that requires treatment.
4. Eat with mood in mind
You may already know that your food choices have an impact on your overall physical health. But some foods can also affect your state of mind.Trusted Source
For example:

Carbohydrates release serotonin, a “feel good” hormone. Just keep simple carbs — foods high in sugar and starch — to a minimum because that energy surge is short and you’ll crash. Choosing complex carbs, such as vegetables, beans, and whole grains, can help you avoid a crash while still providing serotonin.
Lean meat, poultry, legumes, and dairy are high in protein. Protein-rich foods release dopamine and norepinephrine, which boost energy and concentration.
Omega-3 fatty acids, such as those found in fatty fish, have been found to have anti-inflammatory effectsTrusted Source that extend to your overall brain health. If you don’t eat fish, you might consider talking with a doctor about possible supplementation.
Highly processed or deep-fried foods tend to leave you feeling down and so will skipping meals.

If you want to eat with your mood in mind, consider starting with making one food choice for your mood each day.
For example, swap a big, sweet breakfast pastry for some Greek yogurt with fruit. You’ll still satisfy your sweet tooth, and the protein will help you avoid a midmorning energy crash. Consider adding in a new food swap each week.
5. Practice gratitude
Simply being grateful can give your mood a big boost, among other benefits. For example, a two-part study found that practicing gratitude can have a significant impact on feelings of hope and happiness.
You might try starting each day by acknowledging one thing you’re grateful for. You can do this while you’re brushing your teeth or just waiting for that snoozed alarm to go off.
As you go about your day, consider keeping an eye out for pleasant things in your life. They can be big things, such as knowing that someone loves you or getting a well-deserved promotion.
But they can also be little things, such as a co-worker who offered you a cup of coffee or the neighbor who waved to you. Maybe it could even just be the warmth of the sun on your skin.
With a little practice, you may even become more aware of all the positive things around you.
6. Give a compliment
Research shows that performing acts of kindness may also help promote your overall well-being.
Giving a sincere compliment is a quick, easy way to brighten someone’s day while giving your own happiness a boost.
Catch the person’s eye and say it with a smile so they know you mean it. You might be surprised by how good it makes you feel.
If you want to offer someone a compliment on their physical appearance, make sure to do it in a respectful way.
7. Breathe deeply
You’re tense, your shoulders are tight, and you feel as though you just might “lose it.” We all know that feeling.
Instinct may tell you to take a long, deep breath to calm yourself down.
Turns out, that instinct is a good one. ResearchTrusted Source supports the fact that slow breathing and deep breathing exercises can help reduce stress.
The next time you feel stressed or are at your wit’s end, work through these steps:

Close your eyes. Try to envision a happy memory or beautiful place.
Take a slow, deep breath in through your nose.
Slowly breathe out through your mouth or nose.
Repeat this process several times until you start to feel yourself calm down.

If you’re having a hard time taking slow, deliberate breaths, try counting to 5 in your head with each inhale and exhale.
8. Acknowledge the unhappy moments
A positive attitude is generally a good thing, but bad things happen to everyone. It’s just part of life.
If you get some bad news, make a mistake, or just feel like you’re in a funk, don’t try to pretend you’re happy.
Acknowledge the feeling of unhappiness, letting yourself experience it for a moment. Then shift your focus toward what made you feel this way and what it might take to recover.
Would a deep breathing exercise help? A long walk outside? Talking it over with someone?
Let the moment pass and take care of yourself. Remember, no one’s happy all the time.
9. Keep a journal
A journal is a good way to organize your thoughts, analyze your feelings, and make plans. And you don’t have to be a literary genius or write volumes to benefit.
It can be as simple as jotting down a few thoughts before you go to bed. If putting certain things in writing makes you nervous, you can always shred it when you’ve finished. It’s the process that counts.
Not sure what to do with all the feelings that end up on the page? Our guide to organizing your feelings may help.
10. Face stress head-on
Life is full of stressors, and it’s impossible to avoid all of them.
There’s no need to. Stress isn’t always harmful, and we can even change our attitudes about stress. Sometimes, there’s an upside to stress.
For those stressors you can’t avoid, remind yourself that everyone has stress — there’s no reason to think it’s all on you. And chances are, you’re stronger than you might think you are.
Instead of letting yourself get overwhelmed, try to address the stressor head-on. This might mean initiating an uncomfortable conversation or putting in some extra work, but the sooner you confront it, the sooner the pit in your stomach may start to shrink.
 
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Eating a wide variety of nutritious foods, including fruit, vegetables, nuts, seeds, and lean protein can help support your overall health.

Many foods are both healthy and tasty. By filling your plate with fruits, vegetables, quality protein sources, and other whole foods, you’ll have meals that are colorful, versatile, and good for you.
 
Here are 50 healthy and delicious to include in your diet.YT video URL: YT video embedded video URL:Testing... 

What is Lorem Ipsum?
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.


Why do we use it?
It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like).



Where does it come from?
Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 1.10.32.
The standard chunk of Lorem Ipsum used since the 1500s is reproduced below for those interested. Sections 1.10.32 and 1.10.33 from "de Finibus Bonorum et Malorum" by Cicero are also reproduced in their exact original form, accompanied by English versions from the 1914 translation by H. Rackham.


Where can I get some?

What is Lorem Ipsum?
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum
 
Why do we use it?
It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like).Vdeio : video : URL:

When project managing a distributed team in a variety of locations, a collaboration software (or project management) tool is an effective way to keep everyone on the same page and all of your project information in one place. However, using a great tool doesn’t magically make collaboration happen. Here are 10 best practices when using a collaboration software tool:

Share proactively - Assign team members to the tasks they need to be aware of and @mention them in the comments, so they receive alerts when the ball is in their court.
Put every project into your collaboration project management tool - Use your tool as a single source of all project-related materials and notes. This will make the material easy to find for everyone, no matter when they joined the project.
Create water cooler channels - Creating channels in your communication tools where team members can discuss non-work related topics allows them to get to know each other and be social even from afar.
Celebrate small wins - Collaboration tools are a great place to share victories, no matter how big or small. Even a short message can go a long way.
Balance the load - You can’t collaborate well if you’re overloaded with work. Use your tool’s visibility and resource management features to ensure project tasks are balanced among your team members.

The main principles of the Lean methodology include:

Eliminating Waste
Amplifying Learning
Deciding as Late as Possible
Delivering as Fast as Possible
Empowering the Team
Building Integrity In
Seeing the Whole

Lean development eliminates waste by asking users to select only the truly valuable features for a system, prioritize those features, and then work to deliver them in small batches. It relies on rapid and reliable feedback between programmers and customers, emphasizing the speed and efficiency of development workflows. Lean uses the idea of a work product being “pulled” via customer request. It gives decision-making authority to individuals and small teams since this has been proven to be a faster and more efficient method than a hierarchical flow of control. Lean also concentrates on the efficient use of team resources, trying to ensure that everyone is as productive as possible for the maximum amount of time. It strongly recommends that automated unit tests be written at the same time the code is written.