Industry, Innovation and Infrastructure, Ninth Grade Science Projects (Page 16)

Science Fair Project Idea

Scientific Method

A technique often used in wind tunnels is to introduce smoke in front of the airfoil that is being tested. The smoke comes from regularly-spaced point sources, and the wind flow in the tunnel spreads it out into parallel lines, called streamlines. The streamlines make it possible to visualize the airflow over the airfoil. When the lines continue smoothly over and past the airflow, they show that the flow remains laminar, and that the airfoil is creating very little drag. When the… Read more

Measuring Vibrational Frequency with Light

Science Fair Project Idea

Scientific Method

Strike a key on the piano, and you hear the string vibrating. Just about any object vibrates when it's knocked, but how much and how fast? What properties of the material affect the way it vibrates? This project helps you find out. You'll build a simple light-sensing circuit for measuring the frequency of vibrating springs. Read more

He Huffed, and He Puffed, But Didn't Blow the House Down! How Can Straw Make a Sturdy Building?

Science Fair Project Idea

Scientific Method

In the fairy tale of the three little pigs, the wolf huffed and puffed and blew down the first pig's straw house. But in reality, straw, tied into bales, is a viable building material that, when used properly, makes sturdy and energy-efficient buildings. Straw is a renewable resource that is available all over the world since it is the byproduct of growing grain. In this science fair project, you will test a straw bale covered with stucco to see if it's water resistant, and evaluate if it's… Read more

Go, Gadget, Go! Building Robots with LEGO® Mindstorms®

Science Fair Project Idea

Scientific Method

In the mid-20th century, people thought of robots as futuristic tools. But in the 21st century, robots are not a figment of our imaginations, but are a part of our reality. Robots even perform tasks that humans can't do. In this engineering science fair project, you will use LEGO Mindstorms to build a robot that is fast, lightweight, and stable. Who knows? You might end up building a robot that does housework or even your homework! Read more

Why Do Flying Rings Go So Much Further Than Frisbees?

Science Fair Project Idea

Scientific Method

If you've played catch with both Aerobie flying rings and Frisbees, you know that the rings fly much further than the Frisbees with the same throwing effort. Why is that? Investigate the aerodynamics of flying rings and flying disks and find out! Read more

Soft Robots with Built-In LEDs

Science Fair Project Idea

Engineering Design Process

Check out the soft robotic gripper and artificial robotic skin projects. These projects show you how to use flexible silicone rubber to make robots or robotic parts. The second project shows you how to connect external LEDs using an Arduino. The LEDs light up when an embedded piece of conductive fabric stretches. What about embedding LEDs in the silicone rubber? You can do this by embedding the LEDs between layers of silicone (Figure 1). The trick is to solder flexible stranded wires to the… Read more

Color Mixing with Red, Green, & Blue LEDs

Science Fair Project Idea

Scientific Method

This is a good project for someone who is interested in both electronics and color vision. The equipment needed is on the expensive side, but if you continue studying electronics, you can use it again and again. Read more

Strength of Different Construction Materials

Science Fair Project Idea

Scientific Method

There are many types of construction materials used for wood-frame houses. Compare the different uses for and strengths of different building materials, e.g.: particle board, plywood, pine, oriented strand board (OSB), and drywall (gypsum board, SheetRock). The Science Buddies Materials Science Resource Stress, Strength and Strain will be helpful for learning about different ways to measure material strength. You should be sure to use the same cross-sectional area of each material in order… Read more

Two-Point and Four-Point Methods for Measuring Small Resistances

Science Fair Project Idea

Scientific Method

Measuring the value of a resistor with a multimeter is pretty simple. You set the multimeter to measure resistance, connect the two leads to the resistor (possibly using some handy alligator clips), and read the resistance value. This is called a two-point measurement (one probe on each of the two resistor leads). But what if the resistance you want to measure is very small, in the milli or micro-ohm (mΩ or μΩ) range? This can introduce problems because many low-cost multimeters… Read more

Skiing and Friction: How Does Ski Wax Affect the Sliding Friction of Skis?

Science Fair Project Idea

Scientific Method

You can model this with an ice cube sliding down a plank: how high do you need to lift the end of the plank before the ice cube starts to slide? Try this with one side plain wood and the flip side waxed wood (use paraffin wax, candle wax or ski wax). Make sure both sides are equally smooth to start with. Do at least three trials. More advanced: using what you know about the forces acting on the ice cube, derive equations to calculate the coefficient of friction for each case. Variation: chill… Read more

Industry, Innovation and Infrastructure, Ninth Grade Science Projects (167 results)

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