These magma plumes rise to the surface and form chains of volcanoes. Composite volcano magma contains more silica, SiO 2, than that of a shield volcano and is therefore stickier (more viscous). This stickiness plugs up the volcano, causing pressure to build-up. The result is an explosive, dangerous eruption.omposite volcano magma contains more silica, SiO 2, than that of a shield volcano and is therefore stickier (more viscous).
A prime number is a whole number greater than 1 that can only be divided equally by itself and 1. In other words, prime numbers have only themselves and 1 as factors. Any number may be made by multiplying two or more other numbers together. The numbers you multiply together are called factors of the final number. For prime numbers, their only factors are themselves and 1. Letâs take a look at the numbers 1 through 10 as examples: 1  1: not a prime number by definition. 2  2: can only be divided by 2 and 1, so 2 is prime.
There is only one prime number between 91 and 100. All other blocks of ten have at least two prime numbers. The â3âs column has the most prime numbers between 1 and 100. Composite numbers. Numbers that arenât prime are a mix of colours. For example, 15 is 5Ã3 where 5 is blue and 3 is green, so 15 is half blue and half green. All multiples of 6 have to have orange (2) and green (3) in them. Any number ending in 4,6,8 or 0 isnât a prime number.