Eighth Grade, Chemistry Science Experiments (Page 15)

Baking Soda Weight Loss

STEM Activity

Baking soda is not only great for cooking; it is also a useful chemical for science projects. You have probably heard about and maybe even used the baking soda/vinegar reaction to make volcanos erupt, shoot bottle rockets up in the air, or to detect acids and bases. However, there are many more chemical reactions that you can explore with the help of baking soda. One of them is called a decomposition reaction, which makes baking soda lose weight! Want to find out how it works? Then try this… Read more

Bring on the Heat! Investigating Exothermic Reaction Rates

Science Fair Project Idea

Scientific Method

Have you ever pulled a muscle or just been sore after a long day of work or exercise? Hot showers are great, but maybe you've used the more convenient heat packs. Heat packs, which you can buy at grocery or drug stores to soothe aching muscles, use exothermic reactions to produce a low level of heat that lasts for an extended period of time. Exothermic reactions change chemical energy into heat energy. In this chemistry science fair project, you will use heat packs to study the heat-generating… Read more

Build a Bathtub Toy Raft Powered by Surface Tension

STEM Activity

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Have you ever wondered why a water strider can walk on water? Or how detergent can clean your dishes? If you look around you carefully, you can find dozens of similarly interesting phenomena that are all linked to the surface tension of water. In this science activity, you will make a little toy raft that is actually powered by surface tension, and use your vessel to investigate how surface tension works! Read more

Can You Change the Rate of a Chemical Reaction by Changing the Particle Size of the Reactants?

Science Fair Project Idea

Scientific Method

The ingredients in Alka-Seltzer® tablets undergo a chemical reaction that produces carbon dioxide gas as soon as the tablets hit water. Do you think you can cause the tablets to produce gas faster by breaking them into smaller pieces before dropping them in water? Find out for yourself with this project. Read more

Capable Carbon Filters

STEM Activity

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Do you filter your tap water before drinking? Maybe at home you have a water filter on your faucet, in the fridge, or use special pitchers that have a filter unit in them. You have probably heard in commercials that these filters are supposed to make your water cleaner and safer to drink. But have you ever wondered what, exactly, these filters are doing and if the water is really cleaner in the end? Find out about the cleaning power of water filters in this activity; but for results you can… Read more

Diapers: What Keeps Babies and Astronauts from Springing a Leak?

STEM Activity

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When we think about diapers we usually think about babies, because most of us wore them when we were babies and now maybe our siblings or friend’s siblings wear them. But did you know that astronauts also have to wear diapers sometimes? Astronaut diapers are called Maximum Absorbency Garments (MAGs), and astronauts wear them when they have to stay in their suits for long periods of time, such as during spacewalks, or as their ships are re-entering the atmosphere. For babies and for… Read more

Does Wet Hair Float or Cling?

STEM Activity

Have you ever noticed how hair moves freely when it is under the water, but clings together as soon as it emerges out of the water? Not only human hair does this; when wet dogs shake themselves after a swim, their hair clings together in strands. Try this activity to see why wet hair is far less fluffy than dry hair! Read more

Dye Eggs Using Silk Ties for Egg-cellent Colors

Science Fair Project Idea

Scientific Method

Have you ever dyed eggs? Turning eggshells from white into different, dazzling colors can be a lot of fun! To do this, most people buy dye tablets to make different colors in a liquid bath. They then dip the egg into the liquid and wait till it turns the desired color. You can dye eggs in many other ways, and one neat method uses silk ties. Sounds strange to use clothing to dye eggs, right? But it actually works really well! In this science project, you will dye eggs with old or used… Read more

Fancy Foams with Shampoo Science

STEM Activity

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Do you like your hair shiny and beautiful? The key to keeping your hair nice and clean is to use a good shampoo. But what exactly makes a good shampoo? You might be surprised to hear that every new shampoo has to pass lots of scientific tests before it is considered good enough to be sold. Many different shampoo recipes are compared to decide which one is the best for the consumer. One of these tests assesses the foaming behavior of the shampoo. You probably trust a shampoo that makes lots of… Read more

Find the Missing Ingredient

STEM Activity

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Food advertisements and labels bombard us with enticing slogans and attractive images, luring us into consuming the food. But have you ever wondered how nutritious the food is? Have you ever looked at a nutrition facts label and wondered what the columns of words and numbers meant? This activity will shed some light on the label. You will explore serving sizes and nutrients, and might find a discrepancy. Why would the sum of the nutrients not always add up to the total? Like a detective,… Read more

Eighth Grade, Chemistry Science Experiments (165 results)

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