Photosynthesis Reading Worksheet

Photosynthesis is the process green plants use to make their own food from sunlight, water, and carbon dioxide, and it is one of the most important ideas in elementary life science. This photosynthesis reading worksheet gives 4th grade students an original, on-level nonfiction passage that explains how a leaf turns light into sugar and releases the oxygen we breathe. Students meet the key vocabulary — chlorophyll, stomata, carbon dioxide, and oxygen — in sentences that define each term in context, so the science words are learned through reading rather than memorized from a list.

The worksheet opens with a full illustrated passage page, followed by a questions page and a complete answer key. Use this 4th grade plants worksheet as a guided reading page during a science unit, as independent morning work, as homework review, or as a quick check before a unit test. Students read the passage first, then move to Part A, where three fill-in-the-bubble questions check comprehension; Part B, where a word box helps them name the gases and plant parts involved in photosynthesis; and Part C, where they write a short constructed response explaining why a plant kept in the dark cannot make food.

What’s Included

• 1 print-ready PDF worksheet
• Answer key
• An original 252-word illustrated nonfiction passage
• 3 multiple choice questions, 4 word bank sentences, and 1 written response question

This photosynthesis reading worksheet helps children in three ways. First, it builds science content knowledge and reading comprehension at the same time, so students practice the exact skill state assessments measure — pulling evidence out of an informational text. Second, the word bank section anchors difficult academic vocabulary to clear, concrete definitions, which makes those terms far easier to recall later in the unit. Third, the written response question pushes students past simple recall into explanation, asking them to apply what they just read to a brand new situation.

Teachers and parents can extend the lesson easily. Grow a bean seed in a clear cup so children can watch the roots and leaves develop, then compare a plant on a sunny windowsill with one left in a closet for a week. Have students draw and label their own diagram of a leaf, or act out the process as a group, with each child playing sunlight, water, or carbon dioxide. Cooking together with fruits and vegetables is another simple reminder that nearly all of the food on our plates starts with a green leaf.

Related Resources

• Plants Life Science Reading Comprehension Worksheet
• Seeds Plants Fill in the Blanks Worksheet
• Plants Reading Comprehension Digital Worksheet
• Going Green Song (Have Fun Teaching)