How do you read a chemistry scale?

How do you read a scale value?

1. Read the main scale. Look for the last whole increment visible before the 0 (zero) mark.
2. Read the secondary scale (Vernier) measurement. This is the division tick mark that lines up best with a mark on the main scale.
3. Add the two measurements together.

How do you read the uncertainty of a scale?

This is a measure of how well a scale can be read. For an analogue scale, the uncertainty is ± half of the smallest scale division. For a digital scale, the uncertainty is ± 1 in the least significant digit.

What is the proper means of reporting the measurement of the volume of water?

The volume of a liquid can be directly measured with specialized glassware, typically in units of milliliters (mL) or liters (L). In this lab, a beaker, two graduated cylinders and a burette will be used to measure liquid volumes, and their precision will be compared.

What do the lines on a scale mean?

Read a Scale With Lines There are 16 ounces in a pound, so a small scale that weighs in pounds and ounces would have the longest lines at the pound marks, slightly shorter lines to mark quarter pounds (4, 8 and 12 ounces) and the shortest lines to mark ounces between the quarter pounds.

What does the scale 1 50 mean?

The ratio is marked at the left end of the scale. For example, the scale of 1:50 means that 1 mm on the drawing represents 50 mm on the object. This means that the object is 50 times larger than the drawing of it. An object 450 mm long would be represented by a line 9 mm long (450 mm/50).

How do you record uncertainty?

Uncertainties are almost always quoted to one significant digit (example: ±0.05 s). If the uncertainty starts with a one, some scientists quote the uncertainty to two significant digits (example: ±0.0012 kg). Always round the experimental measurement or result to the same decimal place as the uncertainty.

What is an uncertainty value?

Uncertainty of a measured value is an interval around that value such that any repetition of the measurement will produce a new result that lies within this interval.

What is uncertainty in measurement in chemistry?

Uncertainty as used here means the range of possible values within which the true value of the measurement lies. This definition changes the usage of some other commonly used terms. For example, the term accuracy is often used to mean the difference between a measured result and the actual or true value.

How would you record the volume of liquid?

Liquid volume is usually measured using either a graduated cylinder or a buret. As the name implies, a graduated cylinder is a cylindrical glass or plastic tube sealed at one end, with a calibrated scale etched (or marked) on the outside wall.

How do we read volumes of liquids?

Place the graduated cylinder on a flat surface and view the height of the liquid in the cylinder with your eyes directly level with the liquid. The liquid will tend to curve downward. This curve is called the meniscus. Always read the measurement at the bottom of the meniscus.

What is the number on a scale?

The number scale is expressed as a ratio like 1 : 50. This simply means that 1 unit on the map represents 50 units on the ground. So 1 cm on the map will represent 50 cm on the ground, or 1 m on the map will represent 50 m on the ground.

What does a scale measure in units?

Scales measure weight, which is the force acting on a mass that is equal to the object’s mass times its acceleration due to gravity. A scale can’t measure mass directly, because the weighing mechanism and the weight of any given object are dependent on local gravity.

How do you record mass?

One common method of measuring mass is to tare the scale and measure the mass directly. For example, this is how people weigh themselves. The other common method is to place a sample into a container and measure the mass of the container plus sample.

What are units for mass?

Glossary: Mass (weight) Units. The Metric System of Measurements uses the mass units: gram (g), kilogram (kg) and tonne (t).

How do you write a scale?

The scale is shown as the length in the drawing, then a colon (“:”), then the matching length on the real thing. Example: this drawing has a scale of “1:10”, so anything drawn with the size of “1” would have a size of “10” in the real world, so a measurement of 150mm on the drawing would be 1500mm on the real horse.

What does a scale of 1 20 mean?

What does a 1:20 scale mean. The same goes for a 1:20 scale, which when used, represents a subject at a size 20 times smaller than its real word dimensions. Generally speaking, we have varying types of scale to represent different amounts of detail.

How much is 1 gram on the scale?

A 95% accurate digital scale would measure 1 gram equal to somewhere between 0.95 – 0.98 grams. A digital scale that measures mass in ounces will measure 1 gram as 0.0353 ounces.

What does G on a scale mean?

Grams. g. 1. Grams are the traditional unit of measurement used in the majority of weighing tasks. Commonly used in all industries for weighing in small increments.