What are some good science fair projects for 8th graders?
40 Great Eighth Grade Science Fair Projects and Classroom Experiments
- Drop an egg to prove the first law of motion.
- Assemble a Newton’s cradle.
- Blow out a candle with a balloon.
- Relight a candle without touching it.
- Measure and compare lung capacity.
- Conduct fingerprint analysis.
- Engineer a roller coaster loop.
How do you make instant ice?
Turn bowl upside down over a towel (to catch the spills) and place a large ice cube on the bowl. Carefully pour the water slowly onto the ice cube. The water will create a column of frozen ice! In about 20 seconds, the water will get too warm for this trick to work….
Why is clear ice so dangerous?
Clear ice is the most dangerous type of structural ice not only because it is hard to see, but also because it can change the shape of the airfoil. In addition, clear ice often forms well beyond the ice-protected areas of the aircraft.
What liquids freeze the fastest?
Water did freeze the fastest with an average of 56.6 minutes.
What liquids will not freeze?
All that said, the only liquid that does not even freeze at the lowest possible temperature (“absolute zero”) is liquid helium. To turn that into a solid you additionally need to put it under pressure.
What freezes faster milk or water?
Does milk or water freeze faster? From my data table, It is proven that 2% milk freezes faster than both diet coke and water. Also, water has a high specific heat so milk would reach its freezing point much quicker….
Does hot or cold water freeze faster?
Yes — a general explanation. Hot water can in fact freeze faster than cold water for a wide range of experimental conditions. This phenomenon is extremely counterintuitive, and surprising even to most scientists, but it is in fact real.
How fast does milk freeze?
90 minutes
At what temperature does milk freeze?
Cow milk freezes in a range of −0.564 to −0.516°C (30.985 to 31.071°F) with a mean value of −0.540°C (31.028°F) [1]. Variations in environment, management, and breed can all influence the freezing point of animal milk.
Why does milk freeze?
Freezing Point of Milk Unprocessed milk taken from a cow freezes at an average temperature of 31.091 degrees Fahrenheit. If the fat content or other components of the milk are reduced or water is added, the freezing point rises. Milk that freezes in a refrigerator is colder than 32 degrees….
Can fresh milk be heated?
Tip: Room-temperature milk is better in recipes than cold milk, so use the microwave to take the chill off milk that is fresh from the refrigerator. Microwave 250 mL (1 cup) for 40 to 45 seconds* on high (100%). Note: Times are based on a 700-watt microwave oven. Adjust cooking times to suit your oven….
What is freezing point?
Freezing point, temperature at which a liquid becomes a solid. As with the melting point, increased pressure usually raises the freezing point. The freezing point is lower than the melting point in the case of mixtures and for certain organic compounds such as fats.
Can pure water freeze?
“Contrary to popular perception, pure liquid water does not usually freeze at its melting point, 0°C, and can instead supercool to temperatures as low as -38°C….
Is 32 degrees freezing?
We’ve all been taught that water freezes at 32 degrees Fahrenheit, 0 degrees Celsius, 273.15 Kelvin. Scientists have found liquid water as cold as -40 degrees F in clouds and even cooled water down to -42 degrees F in the lab….
Can water be over 100 degrees?
Liquid water can be hotter than 100 °C (212 °F) and colder than 0 °C (32 °F). Heating water above its boiling point without boiling is called superheating. If water is superheated, it can exceed its boiling point without boiling. To experience this, put a container of bottled water into a bowl of ice….
Can ice be colder than 32?
The temperature of ice varies just like the temperature of any other solid substance–within the physical limitations of its solid state. Just as the temperature of water varies between 32 (degrees) and 212 (degrees) (its freezing and boiling points), the temperature of ice ranges from 32 (degrees) downward….
How hot is coffee normally?
Hot beverages such as tea, hot chocolate, and coffee are frequently served at temperatures between 160 degrees F (71.1 degrees C) and 185 degrees F (85 degrees C). Brief exposures to liquids in this temperature range can cause significant scald burns….