Why did it happen? Cause and Effect Worksheet

Cause and effect is one of the first thinking skills a young reader uses to make sense of a story: something happens, and something else happens because of it. This Why Did It Happen Cause and Effect Worksheet gives 2nd Grade students a clear, friendly way to practice that thinking. Students look at a cause, decide what it made happen, and then say the connection out loud in their own sentence. Naming the cause and naming the effect turns a list of events into a story a child can retell, and it is the same reasoning students will use later when they answer “why” questions about a passage on a reading test.

This 2nd grade cause and effect worksheet works in two parts, so it moves students from recognizing a relationship to writing one. In Part A, students draw a line to match each cause to what happened, choosing from four everyday situations they already understand — an open gate, a windy day, watered seeds, and a rainy night. In Part B, students read two short sentences and combine them into one sentence using the word because. Use it as morning work, as a small-group follow-up to a read-aloud, or as a quick check before a longer reading passage. A complete answer key is included, so grading takes a minute.

What’s Included

• 1 print-ready PDF worksheet
• Answer key
• 4 cause-and-effect matching pairs and 2 sentence-combining writing items

There are three reasons this Why Did It Happen Cause and Effect Worksheet helps students learn the skill. First, the matching section uses familiar, concrete events, so a student is thinking about the relationship instead of decoding hard vocabulary. Second, the writing section asks for the connecting word because, which gives students the exact language they need to explain their reasoning in a sentence rather than pointing at an answer. Third, the two sections build on each other — recognizing a pair first makes writing a combined sentence feel like a small next step instead of a brand-new task.

Teachers and parents can keep the skill going all week with a few simple activities. Pause during a read-aloud and ask, “Why did that happen?” before turning the page. Play a quick partner game where one student names a cause, such as “I forgot my umbrella,” and the partner supplies the effect. Notice cause and effect in real life — a spilled cup, a puddle, seeds that sprout after watering — and let students say the whole sentence with because in it. You can also have students draw a two-box comic strip, labeling the first box “cause” and the second box “effect,” then write the matching sentence underneath.

Related Resources

• Find the Cause Cause and Effect Worksheet
• Flashlight Cause and Effect Worksheet
• Hamster Cause and Effect Worksheet
• Story Elements Song by Have Fun Teaching