Pick up the glassware to bring it up to eye level or bend down to take a measurement. Case I: The Meniscus. Concave Meniscus (See diagram A) A meniscus is a crescent-shaped fibrocartilaginous anatomical structure that, in contrast to an articular disc, only partly divides a joint cavity. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. the _________ meniscus is ____ % more injured than the _______. A meniscus is the curved surface at the top of a column of liquid. The meniscus can be either concave or convex, depending on the surface tension of the liquid and its adhesion to the wall of the container. ( Log Out /  with a concave meniscus, measure the bottom of the meniscus and for convex meniscus, take the reading from the top of the meniscus. Bucket handle tear. If the molecules in the liquid are more attracted to the sides of the container than to each other, the liquid will stick to the sides of the container. The quick answer is the meniscus is a C-shaped piece of soft and fibrous cartilage, also known as fibrocartilage, that provides shock absorption and cushion to your knee. The meniscus of a liquid is the upward or downward curve seen at the top of a liquid in a container. The curve at … How to Read a Meniscus in Chemistry Liquids are difficult to measure with the naked eye due to surface tensions causing a meniscus to form on the circumference of the measuring object. A meniscus is a critical shock absorber within the knee. The upper surface of a Liquid in a narrow tube is the Meniscus The meniscus is the curvature of a liquid's surface within a container, such as a graduated cylinder. Most of the joints in our body are lined with a thin layer of articular cartilage, made of collagen and chondroitin. As you may have noticed, when water is in such a thin glass tube, it does not have a flat surface at the top. With most liquids, the attractive force between the liquid and the container is greater than the attraction between the individual liquid molecules. In a science class, this liquid is usually water or some sort of aqueous solution, and the column is usually a graduated cylinder or a pipet. Who was a pioneer in California’s aviation industry. metalloid. wetting or non wetting liquid. The word itself comes from the … Reading is aided by a white card – containing a dark area – placed in back of the meniscus. The key to getting an accurate reading, is to measure the center of the meniscus whether it be concave or convex. ( Log Out /  The job of the meniscus is to cushion the knee joint and transfer forces between the tibia and femur, the thigh and shin bones. Change ), You are commenting using your Twitter account. The bottom of the meniscus is normally read. How capillary action and the meniscus are related to intermolecular forces in water. As you may have noticed, when water is in such a thin glass tube, it does not have a flat surface at the top. The three-dimensional shape of the meniscus is unusual and a bit hard to describe. A longitudinal meniscal tear of the central segment that can d…. Change ), You are commenting using your Facebook account. Make sure that you know the definitions of convex and concave meniscus … In that case, liquid appears to ‘stick’ from the edges forming a concave shape. Risk factors for meniscal tears are. Meniscus. How many atoms are found in one molecule of sodium nitrate (NaNO3)? + the meniscus chemistry 23 Apr 2021 A patient with isolated patellofemoral arthritis typically describes anterior knee pain when rising from a seated position and/or … medial, 75, lateral. Liquids are difficult to measure with the naked eye due to surface tensions causing a meniscus to form on the circumference of the measuring object. The meniscus is the curve seen at the top of a liquid in response to its container. Why are inertial and gravitational mass the same? Meniscus in Chemistry A concave meniscus forms when the liquid molecules are more attracted to the container via adhesion than to each other via cohesion. You will still see a meniscus but because the salt water disturbs the surface tension of water, the meniscus too will be different -- this is hopefully nto surprising. In this article, you will learn what a meniscus is, why it forms and how you can accurately and precisely measure the volume of a liquid in laboratory graduated measuring glassware or plasticware. The nature of curve whether upward (convex) or downward (concave) depends on the surface tension the liquid and its adhesion capacity to the wall of the container. How it will be affected, I am not sure and this is what I was trying to figure out: compared to … The bottom of the meniscus is used to measure the volume of a liquid in apparatus such as a graduated cylinder. Plural menisci (mə-nĭs′ī, -kī, -kē) meniscuses A lens that is concave on one side and convex on the other. elements that have properties of both metals and nonmetals. The meniscus also provides stability within the knee. This is the upward or downward curve at the surface of a liquid in a container. So the liquid "sticks" to the side of the container. This quiz/worksheet combo will help you test your knowledge of meniscus. A meniscus is the gentle curve displayed at the top of a liquid How many signers of the Declaration of Independence became president? A concave meniscus occurs when the molecules of liquid are strongly attracted to the container wall rather than to each other. A meniscus is what happens when you put a liquid into a container. Solubility. For example, water in some plastic cylinders. In humans they are present in the knee, wrist, acromioclavicular, sternoclavicular, and temporomandibular joints; in other animals they may be present in other joints. You must get at eye-level with the meniscus to obtain an accurate reading. Most liquids, including water, show a concave meniscus but a great example of a convex meniscus is liquid mercury in a glass container. E.g. Again, the meniscus is a very important structure. It is also wedge-shaped which improves joint congruency, further adding to knee stability. A safety pipette filler should be used to draw up the solution until the bottom of the meniscus is on the line and the solution is then released into a conical flask. What is Meniscus? Articulate is a fancy way of saying that your joint fits together and moves normally. How many novels did Charles Dickens write? No meniscus makes measuring very easy. A meniscus occurs because of surface tension. In chem always read from the bottom of the meniscus Took the words right out of my mouth! the curved surface of a liquid in a container, which can be either in if the molecules of the liquid are attracted to the container or out if the molecules are attracted to each other (Definition of … Why doesn’t lightning travel in a straight line? This occurs between water and glass. the ratio of the mass of a substance to the volume of the substance. Search results for 'meniscus'. Search the Dictionary for More Terms. Yes the meniscus is when water in say a measuring cylinder or burette curves up the sides of the glass. The Chemistry Glossary contains basic information about basic terms in chemistry, physical quantities, measuring units, classes of compounds and materials and important theories and laws. when work is done on a system by an external force, the system? Measure the meniscus at eye level from the center of the meniscus. To have an accurate reading you must read from the bottom of the curve (meniscus). The meniscus plays two important roles within the knee. What was the main purpose of the International Cotton Expositions held in Atlanta during the New South Era? What is the greatest common factor of 34, 43, and 7? meniscus : Definition: Search for: Biology Glossary search by EverythingBio.com : A concave surface of a liquid resulting from surface tension. A concave meniscus occurs when the particles of the liquid are more strongly attracted to the container (adhesion) than to each other (cohesion), causing the liquid to climb the walls of the container. The nature of curve whether upward (convex) or downward (concave) depends on the surface tension the liquid and its adhesion capacity to the wall of the container. However, before we explain why some liquid have a concave up meniscus while others share a concave down meniscus, we have to understand the adhesive forces at work of surface tension.Water, for example, is a polar molecule that … when it is poured into a container. of liquid, it may be Concave or Convex depending that Liquid is Knee Meniscus. The nature of curve whether upward (convex) or downward (concave) depends on the surface tension the liquid and its adhesion capacity to the wall of the container. age 55+, not able to perform four steps, tenderness on fibular…. The meniscus allows the bottom of your femur (thigh bone) to “articulate” smoothly with the top of your tibia (lower leg bone). ( Log Out /  1) The shape assumed by the surface of a liquid in a cylindrical container. HOW DO YOU KNOW WHAT SIGHN IS GREATER THAN IS UNGREATERTHAN IS SORRY FOR CAPS? When the card is held so that the white part is above the meniscus and the darkened portion is slightly below the meniscus, the meniscus will appear darkened and easier to observe. Change ), You are commenting using your Google account. The curved upper surface of a column of liquid in a container. A meniscus is a curve formed on the upper surface of a liquid inside a container. A concave meniscus occurs when the molecules of the liquid are more strongly attracted to the container than to each other. Position of eye at all volumetric vessels must be at the same level as the meniscus. Water-based fluids like sap, honey, and milk also have a concave meniscus in glass or other wettable containers. The knee meniscus is a special layer of extra cartilage that lines the knee joint. ( Log Out /  Return to top of page. When you put water in a beaker or test tube, you see a curved surface. The meniscus of a liquid is the upward or downward curve seen at the top of a liquid in a container. A convex meniscus occurs when the liquid particles are more attracted to each other than to the walls of the container. How can we prove that time exists as a dimension? (See diagram reading line in the diagram A and B). It is to be noted that in some cases, the meniscus appears in a straight line instead of any curvature at all. Change ). This curve is formed by the surface tension between the liquid and the container holding the liquid. The surface is concave if … the ability of one substance to dissolve in another at a given temperature and pressure. One element ------be changed into another element by a chemical reaction? In a science class, this liquid is usually water or some sort of aqueous solution, and the column is usually a graduated cylinder or a pipet. A meniscus is the gentle curve displayed at the top of a liquid when it is poured into a container. A meniscus is the curved surface at the top of a column of liquid. Parallax is a deceptive change of the position of an object which is observed while the position of the observer changes. Concave Meniscus (See diagram A) How can you prove that 2(√(2+√3)) = √6 + √2? A convex meniscus appears when molecules of liquid are strongly attracted to each other rather than to the wall of container. About This Quiz & Worksheet. The meniscus of a liquid is the upward or downward curve seen at the top of a liquid in a container.

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