It's called Ya Mum's Panis
It is called the Meniscus.
meniscus
Meniscus
meniscus
Graduated Cylinder - Marbles
Step 1) Fill the graduated cylinder with water to a specific volume (example: 50ml).Step 2) Drop the irregular shaped object into the graduated cylinder.Step 3) Measure the new level of the water in the graduated cylinder.Step 4) The difference in volumes in the graduated cylinder equals the volume of the irregular objectexample:original volume of water in cylinder = 50mlvolume of water in cylinder with irregular object = 55ml55ml - 50ml = volume of irregular object in the water = 5ml
A graduated cylinder is a piece of laboratory glassware used to accurately measure out volumes of chemicals for use in reactions. They are generally more accurate and precise for this purpose than beakers or erlenmeyer flasks, although not as precise as a volumetric flask or volumetric pipet. They come in a variety of sizes for different volumes, typically 10 mL, 25 mL, 50 mL, or 100 mL and up to as large as 1 or 2 liters.Determine the volume contained in a graduated cylinder by reading the bottom of the meniscus at eye level.In other words, holding the graduated cylinder at eye level, the bottom of the curved surface of the liquid (called the meniscus) is where you read off the mark on the graduated cylinder to determine the volume properly.
Depending on how accurate you want to be you can use a variety of methods. Common methods include the following (with increasing level of accuracy) 1) graduated cylinder 2) volumetric pipette. 3) Calibrated micro-pipette (may require more than one transfer)
Place the cylinder on a flat surface. Read the volume contained in a graduated cylinder or volumetric flask, by comparing the bottom of the meniscus (the curved surface of the liquid),at eye level, to the nearest graduation or ring.
Graduated Cylinder - Marbles
a meniscus
This is called parallax error.
You should read a graduated cylinder at eye level. See the related link for rules regarding menisci.
A graduated cylinder has a constant diameter and a printed scale on its side that indicates volume inside the graduated cylinder for any given liquid level. A flask has none of these advantages.
Note the level of water in the graduated cylinder. Place the rock into the water carefully. Note the higher level to which the water rises. The difference between the old level and the new level is the volume displaced by the rock.
Water in a glass graduated cylinder adheres to the sides of the cylinder, forming a meniscus which is an upward curve. When reading volume in a cylinder, look at the meniscus at eye level. Read the volume at the bottom of the curve.
Level with the bottom of the fluid's meniscus
Step 1) Fill the graduated cylinder with water to a specific volume (example: 50ml).Step 2) Drop the irregular shaped object into the graduated cylinder.Step 3) Measure the new level of the water in the graduated cylinder.Step 4) The difference in volumes in the graduated cylinder equals the volume of the irregular objectexample:original volume of water in cylinder = 50mlvolume of water in cylinder with irregular object = 55ml55ml - 50ml = volume of irregular object in the water = 5ml
The most accurate way to read a graduated cylinder is to place it on a flat surface. Bend down so you are eye level with the Meniscus Line, the line that is formed by the border between the unfilled portion of the cylinder and the top of the liquid. The very lowest part of this line is where you read the measurement. The markings are in whole numbers, 1, 2, 3, etc., with 10 lines between each number.
Use the water displacement method. You need a graduated cylinder and some water. Fill the graduated cylinder with enough water so that when you place the rock in the graduated cylinder it will cover the rock. Read the meniscus (the slightly curved line of the water) at eye level. Record your measurement of the water in the graduated cylinder (in mL). Place the rock in the graduated cylinder and record your new measurement of the water line, again at eye level. Subtract the original measurement from the new one to get the volume of the rock.
The level of the liquid in the cylinder rose by 10 mL when the rock was submerged in the liquid.