show that any positive odd integer is of the form 4q+1 or 4q+3, where q is some integer

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Is a chemical message sent by another individual.

Large crystals are formed when igneous rocks cool very slowly igneous rocks cool very quickly sedimentary rock is eroded metamorphic rocks change into igneous rock