CSS CSS Basics Understanding Values and Units Em and Rem Units

Himanshu Thanvi
Himanshu Thanvi
899 Points

em and rem

what does "The h2's parent element has a font-size value of 16px" means ?

/* Complete the challenge by writing CSS below */

header {
  font-size: 1.8em;

.title {
  font-size: 1.625rem;

h1 {
  font-size: 5.625rem;
h2 {
  font-size: 1em;
<!DOCTYPE html>
    <title>Lake Tahoe</title>
    <link rel="stylesheet" href="page.css">
    <link rel="stylesheet" href="style.css">
      <span class="title">Journey through the Sierra Nevada Mountains</span>
      <h1>Lake Tahoe, California</h1>
    <div class="main-content">
        Lake Tahoe is one of the most breathtaking attractions located in California. It's home to a number of ski resorts, summer outdoor recreation, and tourist attractions. Snow and skiing are a significant part of the area's reputation.
      <a href="#">Find out more</a>
      <h2>Check out all the Wildlife</h2>
        As spawning season approaches, the fish acquire a humpback and protuberant jaw. After spawning, they die and their carcasses provide a feast for gatherings of mink, bears, and Bald eagles.
      <a href="#">See the Wildlife</a>
      <h3>From Tents to Resorts</h3>
        Lake Tahoe is full of wonderful places to stay. You have the ability to sleep in the outdoors in a tent, or relax like a king at a five star resort. Here are our top three resorts:
      <p>All rights reserved to the state of <a href="#">California</a>.</p>
      <a href="#top">Back to top &raquo;</a>

1 Answer

Steven Parker
Steven Parker
200,782 Points

The challenge is asking you to create a setting using the em unit Since that unit is relative to the font size of the parent element, they are giving you that information so you can use it to calculate the value to complete the task.

If you don't recall how to convert pixels to em units, you might want to review the Em Units video.