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Others Like “Investigating the 'Mpemba Effect': Can Hot Water Freeze Faster than Cold Water?”

Science Fair Project Idea
thumbnail Have you ever made your own ice cream? If you have, you probably surrounded the ice cream container with ice and rock salt to get the mixture cold enough to freeze. But why does that work? How does adding salt (or other substances) affect the freezing point of water? Find out with this ice-cold science project. Read more
FoodSci_p013
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- Less Details
Time Required Short (2-5 days)
Prerequisites Understanding the concepts of molecular weight and moles.
Material Availability Specialty items are needed. See the Materials tab for details
Cost Average ($40 - $80)
Safety No issues
Science Fair Project Idea
Can water remain liquid below its normal freezing point? If it does, that water is supercool(-ed). This project shows you a method for supercooling water. You can test water from different sources to see whether or not it can be supercooled. Read more
Phys_p033
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- Less Details
Time Required Short (2-5 days)
Prerequisites None
Material Availability Readily available. Project will take longer if you have to order and ship a thermometer.
Cost Low ($20 - $50)
Safety No issues
Science Fair Project Idea
thumbnail In this project, you'll learn how to isolate DNA from onion cells, separating it from other cellular components in a manner that still preserves its structure and sequence. In the end, you'll have enough DNA to see with the unaided eye, and you'll be able to spool it to demonstrate its strand-like structure. Read more
BioChem_p001
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Time Required Average (6-10 days)
Material Availability Readily available
Cost Low ($20 - $50)
Science Fair Project Idea
thumbnail Everyone knows electricity can create heat, especially because our electrical appliances tend to warm up when turned on. But wouldn't it be cool to do the reverse — generate electricity from heat? In this science project, you will study why it happens, measure the effect, and then use the phenomenon to build your own device, a thermocouple thermometer, that will enable you to convert heat into electrical energy. Read more
Elec_p072
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- Less Details
Time Required Short (2-5 days)
Prerequisites Understanding of or willingness to look into the concepts of temperature, heat, electrical current, electrical potential, and different theories of modeling electric conductors.
Material Availability Readily available.
Cost Low ($20 - $50)
Safety No issues.
Science Fair Project Idea
thumbnail Enzymes speed up chemical reactions by factors of at least a million. Now that's acceleration! This project investigates how temperature affects how fast these enzymatic reactions occur. Read more
BioChem_p011
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Time Required Short (2-5 days)
Prerequisites None
Material Availability Must have access to a stove, refrigerator, and a freezer.
Cost Average ($50 - $100)
Safety Use caution when handling the hydrogen peroxide, boiling water, stove, and blender. Adult supervision may be required for using the stove.
Science Fair Project Idea
So you've just finished mowing the lawn on a hot summer day, and you'd like a cold, refreshing drink as a reward. You look in the fridge, and oops! it's empty. The sodas are still sitting in the cupboard, at room temperature. What's the fastest way to get that soda down to a cold, drinkable temperature with materials readily at hand? Read more
Phys_p057
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- Less Details
Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability Readily available
Cost Low ($20 - $50)
Safety No issues
Science Fair Project Idea
thumbnail What is the first thing you do when you wake up on a cold, frosty morning? Snuggle down deeper under the covers? Animals, like puppies and piglets, do not like being cold either, but they do not have hands or blankets to wrap themselves up. So when animals get chilled, they change their behavior and do things like huddle—they curl up close to other animals. In this mammalian biology science fair project, you will see just how much huddling can help reduce heat loss. Read more
MamBio_p027
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- Less Details
Time Required Average (6-10 days)
Prerequisites None
Material Availability Readily available
Cost Low ($20 - $50)
Safety Use caution when handling glass jars or thermometers, as they can break or crack if dropped. Adult supervision is required when using the stove.
Science Fair Project Idea
Imagine that you are a detective investigating a murder. You have a body that was found in a swimming pool, and someone reported hearing an argument near the pool at 10:00 PM the night before. Your first question might be "Was this person killed around 10:00 PM last night, or at some other time?" One way to answer this question is to measure the internal temperature of the body. The longer ago the killing occurred, the colder the body. But can you assign a specific time of death to a specific… Read more
Phys_p079
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- Less Details
Time Required Short (2-5 days)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety No issues
Science Fair Project Idea
thumbnail Watching professional racing-car drivers compete can be thrilling. The high speeds that racing cars can reach — up to 200 miles per hour (mph) and more! — put some unique demands on the vehicles. For example, to withstand high temperatures, the tires must be inflated with nitrogen gas, instead of air as with normal car tires. This enables the drivers to have better control over steering their cars as they race around the track. In this sports science project, you will inflate… Read more
Sports_p062
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- Less Details
Time Required Short (2-5 days)
Prerequisites None
Material Availability A helium tank is required to do this science project. See the Materials and Equipment list for details.
Cost Average ($40 - $80)
Safety Follow all safety precautions when using the helium tank and working with helium gas, as described on the tank's packaging.
Science Fair Project Idea
thumbnail Alka-Seltzer® tablets fizz furiously when dropped into water. The moment the tablet starts dissolving, a chemical reaction occurs that releases carbon dioxide gas. Can you make Alka-Seltzer fizz faster or slower by changing the temperature of the water? How big of a difference in the rate of a chemical reaction can temperature make? Read more
Chem_p027
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- Less Details
Time Required Short (2-5 days)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety Adult supervision may be needed when working with hot water solutions.
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