Passing a query parameter from an AJAX get call to an express route

I'm playing around with a twitter API wrapper for Node right now and am trying to figure out how to pass a query parameter from an HTML form to an AJAX get request and have that parameter then passed into my Express route, rather than just having the form action go directly to the route.

Here's my HTML code

  <form id="searchTerm">
    Keyword:<input id="keyword" type="text" name="q" placeholder="Keyword">
    <input type="submit">
  </form>

My client-side Javascript

$(document).ready(function() {
  $('#searchTerm').on('submit', function() {
    $.ajax({
      type: 'GET',
      data: q,
      url: '/search/tweets/term',
      success: function(data) {
        console.log(data);
      },
      error: function(error) {
        console.log(error);
      }
    });
  });
});

And then my Node.JS route:

// Search by keywords or phrases
app.get('/search/tweets/term', function(req, res) {
  var q = req.query.q;

// Accesses the Twitter API and pulls back the respective tweets
  client.get('search/tweets', {q: q, count: 100, lang: 'en', exclude: 'retweets'}, function(error, tweets, response) {
    if(!error) {
      res.send(tweets);
    } else {
      console.log(error);
      res.status(500).send(error.stack);
    }
  });
});

I'm getting a "Query Missing Parameters" error message in my terminal whenever I input a value into the form, however. Not sure what I'm doing wrong.

via cn1993