Some things to write about when you are describing the main metre or tempo:

1.  Identify the time signature

Tap along to the music and find the pulse - where is the strong beat? 

Can you find the "heartbeat" of the music? How many "weak" beats are there between "strong" beats? Does this piece remind you of a dance? If so, what kind?

Use the words simple or compound.

e.g:  6/8 compound duple - Tennessee Whiskey - 2 beats - each beat divided into 3 (listen to the hi-hat)     

4/4 simple quaduple - Happy - 4 beats - each beat is divided into 2 (the kick/snare pattern on the drums)

3.  What kind of rhythms can you hear?

Eg. mostly long notes? mostly short notes? Do different instrument contrast others?

 Is there a prevalent rhythmic feature that recurs? Can you clap or sing it? Can you describe it another way? 

Are there many rhythmic ideas or just a few? 

4. Can you hear any rhythmic features like triplets or dotted ryhthms?

Triplets sound like this: What is a triplet

Are there dotted notes? How to feel dotted ryhthms

Does the music sound uneven?:  Swing music explained

Listen to the uneven rhythm in the guitar here: Drift Away

7. What is the effect on the mood or intention of the music?

Is there ever a rhythmic or dance like character to the accompaniment (melodic support)? Can you describe it?

Is rhythm a feature in the song? Does it play an important part in setting the feel or mood?

Do the sixtheenth notes make the music feel like it's driving forwards?

Do the long notes make the music feel slower, even though the tempo remains the same? 

8. How do the rhythmic features you have describe contribute to the genre or style of the music?

e.g Off beat = Reggae.  

Other things to consider:

Do the rhythms change as the piece progresses? 

Does the composer use several rhythmic ideas together? (This can overlap with consideration of texture).