1. Beaker:
* Shape: A tall, cylindrical container with a wide, open top and a spout for pouring.
* Material: Usually made of heat-resistant glass or plastic.
* Markings: May have graduated markings (lines) on the side to indicate volume, but these are often less precise than a graduated cylinder.
* Appearance: The most common beaker looks like a tall, wide glass with a lip at the top.
2. Graduated Cylinder:
* Shape: Tall, cylindrical container with a narrow, graduated scale running vertically along the side.
* Material: Usually made of clear glass or plastic.
* Markings: Very precise graduations (lines) to measure volume with high accuracy.
* Appearance: Similar to a beaker, but thinner and taller with more detailed markings.
3. Triple Beam Balance:
* Shape: A rectangular base with three horizontal beams.
* Material: Typically made of metal.
* Components:
* Three beams: Each beam has a sliding weight that can be moved along the scale.
* Pan: A platform on which the object to be weighed is placed.
* Pointers: These indicate the weight on each beam.
* Appearance: Looks like a metal frame with three beams and a pan. The beams have numbers and sliding weights, and a pointer that lines up with the scale to indicate the weight.
4. Spring Scale:
* Shape: A spring suspended from a hook or frame.
* Material: Metal spring with a hook at the bottom and a scale attached to the spring.
* Components:
* Spring: This stretches or compresses when a force is applied.
* Hook: Attached to the bottom of the spring to hold the object being weighed.
* Scale: Marked with units of force, usually in grams, kilograms, or ounces.
* Appearance: Looks like a spring hanging from a hook or frame, with a numbered scale attached to the spring.
5. Sling Psychrometer:
* Shape: Two thermometers attached to a frame.
* Material: The thermometers are typically glass tubes with mercury or colored alcohol.
* Components:
* Two thermometers: One dry bulb (normal thermometer) and one wet bulb (wrapped in a wet cloth).
* Frame: The thermometers are attached to a frame that allows for swinging them through the air.
* Appearance: Looks like two thermometers mounted side-by-side, with one thermometer covered in a wet cloth.
6. Barometer:
* Shape: Varies depending on the type.
* Material: Can be made of glass, metal, or plastic.
* Types:
* Mercury Barometer: A glass tube filled with mercury, with the open end submerged in a pool of mercury. Air pressure pushes down on the mercury, causing the level in the tube to rise or fall.
* Aneroid Barometer: A sealed metal chamber that expands and contracts with changes in air pressure. The movement of the chamber is connected to a needle that points to a scale to indicate pressure.
* Appearance: The mercury barometer is a long glass tube with a reservoir of mercury at the bottom. Aneroid barometers are typically circular or rectangular metal instruments with a dial and needle.
