Ask an Expert (Page 124)

What's the simplest logic circuit to make...without IC's?

Ask an Expert Topic Forum: Grades 9-12: Physical Science

What's the simplest logic circuit to make...without IC's? What's the simplest logic circuit to make...without IC's? Hi! I'm a producer with Scripps News and a science journalist. I'm making a video for my show (The Why) to explain how a microchip works and why they're so hard to make. I thought in the video I would use breadboard to make a half adder (or an even simpler logic circuit!) to show how the absolute most simple logic circuit works Here's are two… Read more

TV producer: Making an adder electric circuit!

Ask an Expert Topic Forum: Grades 6-8: Life, Earth, and Social Sciences

TV producer: Making an adder electric circuit! TV producer: Making an adder electric circuit! Hi! I'm a producer with Scripps News and a science journalist. I'm making a video for my show (The Why) to explain how a microchip works and why they're so hard to make. I thought in the video I would use breadboard to make a half adder (or an even simpler logic circuit!) to show how the absolute most simple logic circuit works Here's are two… Read more

Question about DIY Mini Drone activity: not lifting

Ask an Expert Topic Forum: Grades 6-8: Physical Science

Question about DIY Mini Drone activity: not lifting Question about DIY Mini Drone activity: not lifting I made the drone as instructed. Everything seems correct. The propellers are spinning the right direction and I can feel the wind pushing down. One strange problem. There doesnt seem enough power to lift the drone. The batteries are fine. What could be causing this? ------------------------------------- Leave this to help the Experts: The activity can be viewed at:… Read more

Plant fertilizer question

Ask an Expert Topic Forum: Grades 6-8: Life, Earth, and Social Sciences

Plant fertilizer question Plant fertilizer question We are planning an experiment to test whether a natural fertilizer made from repurposed materials can achieve the same plant growth like commercial synthetic fertilizer such as MiracleGro. We have figured out a recipe that combines N, P, K in a similar ratio as MiracleGro. For this experiment, we will need a potting soil which does not already include any fertilizers. All the potting soils on Amazon seem to have fertilizers or other… Read more

hypothesis help

Ask an Expert Topic Forum: Grades 9-12: Physical Science

hypothesis help hypothesis help Hello, So I'm doing a science experiment basically like the electrolyte challenge were my independent variable is the different types of drinks and the dependent variable is the conductivity reading, and I feel like my hypothesis just doesn't feel right. It's "The higher conductivity of a drink, the greater the electrolytes the drink contains". I feel like the hypothesis is lacking something or just doesn't fit the experiment and could really appreciate some… Read more

Science Fair First Grade

Ask an Expert Topic Forum: Grades K-5: Life, Earth, and Social Sciences

Science Fair First Grade Science Fair First Grade My kid is in first grade and I wanted to ask if it is okay build a product using a prepackaged kit to run an experiment on. The product is not the main theme. It's the experiment that she will be running on the product. Or should the product be build from scratch? Re: Science Fair First Grade A lot will depend on what your student's teacher has required or assigned. Using a readymade product probably isn't an issue, especially if your… Read more

Where to start for preparing to win an Isef bid from state fair

Ask an Expert Topic Forum: Grades 9-12: Life, Earth, and Social Sciences

Where to start for preparing to win an Isef bid from state fair Where to start for preparing to win an Isef bid from state fair Hello so I am a senior researcher who recently won first place in my regional fair and will be competing in early april at the state fair for a chance to earn a bid to go to Isef and was wondering on where I should start in my preparation for the event. my teachers have advised I start modifying my speech and my poster and have no idea what sources I should use… Read more

Test growth of plants in gravity - Clinostat device

Ask an Expert Topic Forum: Grades 6-8: Life, Earth, and Social Sciences

Test growth of plants in gravity - Clinostat device Test growth of plants in gravity - Clinostat device Going to test plant growth from seeds in gravity using Clinostat and plant growth on Earth using different factors like light, temperature, and water. After building the clinostat, should I keep running the motor to give a stimulus of gravity feel? Please refer the following… Read more

Catchy title for paper book tower project

Ask an Expert Topic Forum: Grades K-5: Physical Science

Catchy title for paper book tower project Catchy title for paper book tower project Hi, looking for ideas for a catchy title for my child’s science fair project. We are making columns out of paper, in different shapes. Cylinder, square, etc. And testing how many books the columns can hold in a stack, before the stack collapses. Paper towers or paper power is all I can think of but wanting something more eye catching. Thank you! Re: Catchy title for paper book tower project "Form and… Read more

Safety of dishwashing soap

Ask an Expert Topic Forum: Grades 9-12: Life, Earth, and Social Sciences

Safety of dishwashing soap Safety of dishwashing soap I want to test the safety of dishwashing soap compared to the naturally derived dishwashing soap (green alternative). What would be the best method of testing and comparing toxicity/safety? Read more

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