Font size in CSS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the font size of the paragraph to 1.5rem.

CSS

p {
  font-size: [1];
}

Drag options to blanks, or click blank then click option'

Alarge

B15px

C150%

D1.5rem

Attempts:

3 left

💡 Hint

Common Mistakes

Using pixels (px) instead of rem for better scalability.

Using keywords like 'large' which are less precise.

The font-size property sets the size of the text. Using 1.5rem means 1.5 times the root font size, which is a good practice for responsive design.

2fill in blank

medium

Complete the code to make the heading font size twice the size of the parent element's font size.

CSS

h1 {
  font-size: [1];
}

Drag options to blanks, or click blank then click option'

A2em

B200rem

C2px

D20%

Attempts:

3 left

💡 Hint

Common Mistakes

Using px which is absolute and not relative.

Using rem which is relative to root, not parent.

The em unit is relative to the font size of the parent element. Setting font-size: 2em; doubles the size relative to the parent.

3fill in blank

hard

Fix the error in the code to correctly set the font size to 18 pixels.

CSS

div {
  font-size: [1];
}

Drag options to blanks, or click blank then click option'

Apx18

B18px

C18

Dsize:18px

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the unit.

Writing units before the number.

Using invalid property syntax.

Font size values must include units like px for pixels. Just writing 18 is invalid CSS.

4fill in blank

hard

Fill both blanks to set the font size of paragraphs to 120% and headings to 2rem.

CSS

p {
  font-size: [1];
}
h2 {
  font-size: [2];
}

Drag options to blanks, or click blank then click option'

A120%

B1.2em

C2rem

D20px

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up em and rem units.

Using absolute units like px when relative units are better.

Using 120% increases the font size by 20% relative to the parent. Using 2rem sets the heading size to twice the root font size.

5fill in blank

hard

Fill all three blanks to create a CSS rule that sets a class .highlight with font size 1.25rem, line height 1.5, and font weight bold.

CSS

.highlight {
  font-size: [1];
  line-height: [2];
  font-weight: [3];
}

Drag options to blanks, or click blank then click option'

A1.25rem

B1.5

Cbold

Dnormal

Attempts:

3 left

💡 Hint

Common Mistakes

Using units for line height (should be unitless or length).

Using numeric font-weight instead of keywords like 'bold'.

This CSS sets the font size to 1.25 times the root font size, line height to 1.5 times the font size for good spacing, and font weight to bold for emphasis.