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Electrolyte challenge, why dip in tap water

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

Electrolyte challenge, why dip in tap water Electrolyte challenge, why dip in tap water In the example experiment for the electrolyte challenge the conductance sensor is dipped in tap water followed by distilled water in between each sports drink that is being tested. We understand using tap water as one of your tests as it is a conductor. But, what is the purpose of first dipping it in the tap water rather than just using the distilled water to rinse? Re: Electrolyte challenge, why dip in… Read more

Measuring glucose in fruit

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

Measuring glucose in fruit Measuring glucose in fruit My 7th grade daughter is measuring glucose in 3 fruits for Science fair. We have the sugar metabolism kit from your site. As she is repeating the test (for an apple, for example), does she need to use the same slice of apple every time, or a different slice from the same apple? Secondly, do the slices from each fruit (apple, pineapple, lemon) need to be the same size? Thank you! Re: Measuring glucose in fruit Hello! I would… Read more

Antioxidants Project

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

Antioxidants Project Antioxidants Project Abstract Antioxidants have become very popular in the news lately for their potential health and anti-aging properties. Antioxidants work by preventing oxidation reactions that produce free-radicals which can cause harm to the body. Try testing different vitamins for antioxidant activity. How do vitamins A, B, C, and E compare? Do some vitamins have more antioxidant activity than others? What are some other sources of antioxidants? Try testing… Read more

Light, Color and Heat

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

Light, Color and Heat Light, Color and Heat My son is doing the 'How Does Color Affect Heating by Absorption of Light?' experiment for a science fair. We purchased an infrared light bulb but now I am wondering if we should use a regular white light bulb. Both would be 250 W in strength. Will using the infrared light affect the results of the experiment? Thank you! Re: Light, Color and Heat Hi - it depends on what you mean by "regular white light bulb." [b]Incandescent[/b] bulbs still… Read more

Dealing with Diabetes: The Road to Developing an Artificial Pancreas. Pls help asap!

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

Dealing with Diabetes: The Road to Developing an Artificial Pancreas. Pls help asap! Dealing with Diabetes: The Road to Developing an Artificial Pancreas. Pls help asap! I am doing this project without the multimeter and everything is fine, except for the pump. I have been working on this for hours and when I thought my about giving up, i unclipped by alligator wires from the sensor and all of a sudden the pump started working fine. For context the sensor I made works fine with the… Read more

I need help - converting cellulose into glucose

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

I need help - converting cellulose into glucose I need help - converting cellulose into glucose Hi, is the following procedure/hypothesis viable for converting cellulose into glucose? Hypothesis: I hypothesise that 0.5% cellulase will be the optimum point at which the most glucose is produced while using the least cellulase. Procedure: Obtaining cellulose 1. Collect 60g leaves from the same plant 2. Add 3-4 drops of distilled water into the leaves 3. Grind plant material with mortar and… Read more

Simple Drone

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

Simple Drone Simple Drone How do I get the drone to fly up the two dowels? The drone flies perfectly off the dowels and does well even when it's on one dowel. However, I have two parallel drilled holes in a wooden block and the drone will not go up. Re: Simple Drone Hi - for this to work on two dowels it's very important that the dowels are parallel and properly spaced to align with the straws, which should also be parallel. You should be able to easily slide the drone up and down the… Read more

Hydrogel project

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

Hydrogel project Hydrogel project Hi! My daughter tried the hydrogel recipe with agar and citric acid. After setting the hydrogel for about 18 hours, she submerged the hydrogel in water, but it absorbed hardly any water. The weight of 25 g hydrogel went up by only about 4 gms after an hour. Is this within the expected range? [Administrator note https://www.sciencebuddies.org/science-fair-projects/project_ideas/AgTech_p013/agricultural-technology/water-conservation-hydrogels ] Read more

Multimeter sport drink question

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

Multimeter sport drink question Multimeter sport drink question Hello I am doing my own of the sport drink and orange juice experiment, seeing how much electricity is in each sport drink. I am using electrolyte tablets and diluting them with water and then measuring the electricity. I followed step by step your procedures but when I put the straw in the solution my multimeter still shows 00.0. idk what to do and I've tried so many times to fix little things and it is still not working Re:… Read more

Question about How Do Arctic Animals Stay Warm? activity

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

Question about How Do Arctic Animals Stay Warm? activity Question about How Do Arctic Animals Stay Warm? activity I need a more cost effective suggestion to use in place of butter. Hair gel from the dollar store? I intend to do this with multiple classes of kiddos and cannot fathom the cost and waste of 50 groups worth of butter. ------------------------------------- Leave this to help the Experts: The activity can be viewed at:… Read more

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