Galileo Thermometer How Does It Work

Galileo Thermometer How Does It Work?

Galileo thermometers work on the principle of buoyancy which determines whether objects float or sink. As the temperature changes the glass balls will either sink to the bottom (temperature rises) or float to the top (temperature falls).

What is a Galileo thermometer filled with?

Hello Caroline The liquid in AcuRite Galileo Thermometers is 100% paraffin. The colored bulbs are filled with paraffin and 3.4% dye. The liquid is non-toxic.

Where do you put the Galileo thermometer?

You can hang the thermometer inside or outside. The key is to not hold the thermometer in your hands because your hands will warm it up and give a skewed reading. The spheres in the thermometer take a few minutes to float to the correct places. Keep in mind that Galileo thermometers are not super precise.

How does Galileo’s thermometer make use of thermal expansion?

The indicator liquid in thermometer expand when heated and contract when cooled we observe the level of mercury rising as the thermometer is heated and falling as the thermometer is cooled. when the level rises the liquid in the bulb is expanding and when the level falls the liquid in the bulb is contracting.

How does a glass thermometer work?

Liquid-in-glass thermometers are based on the principle of thermal expansion of substances. A liquid in a glass tube (called a capillary) expands when heated and contracts when cooled. A calibrated scale can then be used to read off the respective temperature that led to the corresponding thermal expansion.

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Do Galileo thermometers lose water?

Since the surrounding air is 70 degrees we know the water inside the thermometer is also about 70 degrees. The blue and yellow bubbles (60 and 65 degrees respectively) are calibrated so that they have higher densities than the water at this temperature so they sink.

What should you do if you spill mercury?

Sprinkle sulfur powder over the contaminated area and rub it gently all over the surface and into the cracks with a paper towel. Sulfur powder binds with mercury. Use a paper towel dampened with water followed by wiping with another damp paper towel to clean up the sulfur and mercury.

How do you read Galileo’s temperature?

The temperature can be measured by reading the metal tag attached to the lowest of the floating balls in the top half of the thermometer. Galileo thermometers work on the principle of buoyancy which determines whether objects float or sink.

How do you fill a Galileo barometer?

Storm Glass Barometer Setup

1) Fill a container with water — use distilled water to help prevent streaks on the glass. 2) Add food coloring to the water to make it easier to see. 3) Push the injection tube onto the syringe (shown below). 4) Fill the syringe with the colored water.

How do you fill a Goethe barometer?

On a day with average air pressure fill the barometer about halfway with boiled or distilled water. This helps to avoid limescale stains inside the glass. The water level inside the spout and the glass should be approximately the same.

How do you make a Galileo thermometer?

Make your own Galileo Thermometer
  1. A small fish tank or similar clear sided container.
  2. 8 small baby food jars or similarly watertight lidded containers.
  3. Sand.
  4. Water.
  5. Vaseline or silicone sealant.
  6. Digital Scales and a measuring cylinder.

How do thermometers work by thermal expansion?

When a substance gets hotter it expands to a greater volume. Nearly all substances exhibit this behavior of thermal expansion. It is the basis of the design and operation of thermometers. As the temperature of the liquid in a thermometer increases its volume increases.

Do Galileo thermometers contain mercury?

No there is no mercury in a Galileo thermometer. A Galileo thermometer consists of a vertical glass tube containing water with several different…

Who makes Galileo thermometers?


Product information
Product Dimensions 13.1 x 9.5 x 5.6 inches
Manufacturer AcuRite
Country of Origin China
Item model number 00795A2

What is the largest Galileo thermometer?


These large 44cm Galileo Thermometers are the perfect addition to all houses!

What is the liquid in a thermometer?

In a mercury thermometer a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature the mercury expands and contracts and the temperature can be read from the scale. Mercury thermometers can be used to determine body liquid and vapor temperature.

What happens if you break a mercury thermometer?

A broken mercury-containing thermometer can be toxic if the vapors are inhaled. The risk of poisoning from touching or swallowing mercury from a broken thermometer is low if appropriate clean-up measures are taken.

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How do you get mercury out of a broken thermometer?

Slowly and carefully squeeze mercury onto a damp paper towel. Alternatively use two pieces of cardboard paper to roll the mercury beads onto the paper towel or into the bag. Place the paper towel in a zip locking bag and secure. Make sure to label the bag as directed by your local health or fire department.

Can you wash mercury out of clothes?

Throw all clothing that came in contact with liquid mercury in the trash. … Wash clothing or other items that were exposed to mercury vapor during the cleanup but did not get mercury directly on them. “In no case should a vacuum cleaner or broom be used to remove mercury.

What is the normal temperature of a healthy person?


Normal body temperature varies by person age activity and time of day. The average normal body temperature is generally accepted as 98.6°F (37°C). Some studies have shown that the “normal” body temperature can have a wide range from 97°F (36.1°C) to 99°F (37.2°C).

How do you read a water barometer?

Look at the water in the spout of the barometer. If the water holds steady around the middle of the spout you’ll have good weather. The water should never dip below this middle amount so it’s the default position of the water. Check to see if the water creeps up the spout.

How does a thermometer work?

How does a thermometer tell the temperature? A thermometer measures temperature through a glass tube sealed with mercury that expands or contracts as the temperature rises or falls. … As temperatures rise the mercury-filled bulb expands into the capillary tube. Its rate of expansion is calibrated on the glass scale.

How does liquid barometer work?

A water barometer or storm glass is used to predict stormy weather. It works because of changes in atmospheric pressure. … The top of the spout is above the water level and open. When air pressure sinks lower than when the body was sealed with water the water level in the spout rises above the level in the body.

How do you add water to a barometer?

Dip a large syringe into the water and pull back the plunger to fill it. (Look for dental syringes meant for rinsing teeth and gums with warm water.) Push a 24-inch length of plastic tubing onto the end of the syringe and insert the other end of the tube into the spout of the water barometer.

How do you read weather predictions for storm glass?

  1. If the liquid in the glass is clear the weather will be bright and clear.
  2. If the liquid is cloudy the weather will be cloudy as well perhaps with precipitation.
  3. If there are small dots in the liquid humid or foggy weather can be expected.
  4. A cloudy glass with small stars indicates thunderstorms.

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Does the water level in the neck of the weather glass move up or move down when a low pressure system approaches?

When the barometric pressure increases the water level in the spout decreases and when the pressure decreases the level rises – under the precondition that the temperature stays constant (figure 2).

Why did Galileo invent the thermometer?

In 1593 Galileo Galilei invented a rudimentary water thermoscope which for the first time allowed temperature variations to be measured. … It was perhaps the first crude clinical thermometer as it was designed to be placed in a patient’s mouth for temperature taking.

How does a Galileo thermometer work Youtube?

How did santorio invent the thermometer?

Shortly after Galileo Italian scientists Santorio Santorio invented the first thermometer by adding a paper scale to the thermoscope. Now the exact change in temperature could be measured. In 1654 the Grand Duke of Tuscany Ferdinando II invented the sealed liquid in glass thermometer.

What are 2 examples of thermal expansion?

8. Thermal expansion examples
  • If you have ever tried to unscrew a stuck lid off a glass jar you’ll appreciate this expansion effect. …
  • Bridges have a long span and in hot weather the materials that the bridge is made of will expand. …
  • A liquid when heated will expand and can be made to rise up a tube.

What is a thermal expansion thermometer?

Thermal expansion is the basis of which a thermometer works. This is due to the properties of thermodynamics- a substance expanding and retracting due to changes in heat. … The same is true with a thermometer. The tube is so thin that the liquid can either move up or down. And this is where thermal expansion comes in.

Why does liquid rise in a thermometer?

The liquid in the thermometer goes up when the thermometer is heated because heating makes the alcohol molecules of the liquid move faster. The extra speed of the molecules competes with their attraction for one another and causes them to move slightly further apart.

What effects did Galileo’s discoveries have after his death?

What effects did Galileo’s discoveries have after his death? Now able to observe the rotation of planets and confirm Copernican views of the solar system. What contributions did Newton make to scientific knowledge during the Renaissance?

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Galileo Thermometer explanation and timelapse showing thermal expansion

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