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Measurements can be represented in either decimal or scientific notation. Scientists primarily use the SI (International System) or metric systems. We use base SI units such as meters, seconds, and kilograms, as well as derived units, such as liters (for volume) and g/cm 3 (for density).
Standard form is a way of making it easier to write very big and very small numbers. n (the power of 10) tells us the number of places to move the decimal point. Example 1 To find the number that 3.7 x10 3 represents, we move the decimal point 3 spaces to the right: 3.7.... 37... 370 ... 3700.
Standard Form. Many numbers in biology will be written in standard form (scientific notation). Learners are expected to be able to express results in standard form and be able to convert to and from decimal form. For example, the size of a cell may be 100 μm or 0.0001 m in ordinary (decimal) form.
Scientific notation is a concise method of expressing numbers that are too large or too small to be conveniently represented as decimals. Since science is often concerned with very large things (e.g., galaxies, light years, planets) and very small things (atoms, bacteria, viruses), scientific notation is commonly used in science and engineering.
How are cells structured? Learn about the size and function of plant and animal cells for GCSE Biology, AQA.
Maths - orders of magnitude. Comparing sizes. The diagram shows the size of three organisms, different cells and other structures. Sizes can be compared using a straightforward calculation. For...
Decimals allow us to clearly identify that a number is not whole. They show us fractions of numbers in a very clear way.
