Gears date back many centuries and are extremely useful since they can change the direction imposed by a source of power, as well as torque and speed. This lesson describes an experimental study of the relationship between gear ratio and angular velocity by using PocketLab Voyager and Wonder Gears. Wonder Gears is listed for ages 3+, with this lesson heavily emphasizing the “+” part of the description—since this lesson is perfect for junior high students aged 12 through 14. This is one of the many advantages of Po
Download the Scratch .sbx file for a Space Blaster game you can play with Scratch and PocketLab. Works with PocketLab One and Voyager.
Instructions to run ScratchX and the PocketLab web app are here.
The Space Blaster game is also featured in our PocketLab and Scratch STEM Coding Challenge - see attached pdf file for complete programming guide.
Let’s imagine two scenarios:
1. Two identical vehicles, each of whose speedometers reads 50 mph, travel toward each other and experience a head-on collision.
2. Another identical vehicle, traveling at 50 mph, hits an unmovable, unbreakable and impenetrable rock wall.
Which collision is more severe from the viewpoint of one of these vehicles?
The PocketLab HotRod is a fun and creative take on the classic “physics cart”, except it’s not boring and it doesn’t look like a brick on wheels.
This lesson makes it possible for your students to study radioactive decay and half-life concepts without the need to purchase expensive radiation monitors and actual radioactive isotopes. Scratch and Voyager work together to accomplish this via a simulation that matches that of true radioactive decay. ScratchX is not required, but may be used. The Scratch program provides the decay process. With each decay of a simulated atom, the Scratch screen quickly flashes white and emits a beep sound similar to that of a typical Geiger counter. Voyager’s light sensor records each of the decays a
We can build a very good random number generator in Scratch using the PocketLab Voyager's light sensor and a lava lamp. Sounds crazy? Not really, there is actually a US patent for such a system! It turns out that on their own, computers are not good at generating true random numbers, therefore to make true random numbers using a computer you need an external source of randomness.
This lesson introduces students to a variety of probability and statistics concepts using PocketLab Voyager and Scratch—ScratchX is not required. The Scratch program simulates tossing any number of coins any number of times, displaying the number of heads in each toss with a square having varying shades of grey—black for zero heads and white for the maximum possible number of heads in each toss. The simulated coins are tossed once each second with Voyager’s light sensor recording the results for each toss.
On a hot, sunny day, would you rather wear dark or light-colored clothes? Have you ever walked across dark pavement barefoot on a hot day? How did that feel? Would you rather walk on the dark pavement or a lighter colored sidewalk along green grass? In this experiment you will investigate how the color of objects can affect it’s temperature.
Objective: The objective of today’s lab is to determine if water or sand heats up more quickly and “keeps” its heat longer. You will then use your collected data to answer the following question: How does a hot, sunny day at the beach affect a fish in the water differently from a crab on the sand? Explain.