What is the technical name for every second line rhyming in a poem?

Question

I know that when every line rhymes it is called rhyming couplets, but what is the term for every second line rhyming?
eg.
I have a cat
I have a dog
It sleeps on a mat
It likes the fog

cat, mat and dog, fog

Answer 1

You might be looking for the "rhyme scheme."

In your poem, the rhyme scheme is:

A
B
A
B

Good Luck....

Answer 2

it is not haiku.

it is called a "simple four line sonnet".

try this link:

http://en.wikipedia.org/wiki/Rhyme_scheme

have a nice day!

Answer 3

haikou?