Cause and Effect: Why Things Happen

Grade 2 · English · Study Guide

Learn how to identify why something happened (cause) and what happened as a result (effect).

Every event has a reason it happened — that reason is the cause. And every cause leads to a result — that result is the effect. Understanding cause and effect helps you understand how the world works and makes you a much stronger reader.

Here is a simple example: 'It rained all day, so the soccer game was canceled.' The CAUSE is: it rained all day. The EFFECT is: the soccer game was canceled. The rain made the cancellation happen!

Look for signal words that hint at cause and effect relationships. Words like 'because,' 'so,' 'since,' 'therefore,' and 'as a result' often connect a cause to its effect. 'She was late BECAUSE she missed the bus.' 'He missed the bus, SO he walked to school.'

In stories, cause and effect moves the plot forward. The character does something (cause) and that leads to the next event (effect). Understanding this chain helps you follow the story and predict what might happen next. Ask yourself: 'Why did this happen?' for the cause and 'What happened as a result?' for the effect.

Cause and Effect Examples
Cause (Why?)	Effect (What happened?)
It rained all day.	The soccer game was canceled.
She forgot her lunch.	She was hungry all morning.
He studied hard.	He got an A on the test.
The dog barked.	The baby woke up.
She watered her plant.	The plant grew tall.

Key terms

cause: The reason something happened — the 'why'
effect: What happened as a result of the cause — the 'what happened'
signal words: Words that show cause and effect: because, so, since, therefore, as a result

Flashcards

cause: The reason something happened — asks 'Why?'
effect: What happened because of the cause — asks 'What happened?'
because: A signal word showing the cause — 'I was late because my alarm did not go off'
so / therefore: Signal words showing the effect — 'It rained, so we stayed inside'
cause and effect chain: One event causes another, which causes another — like falling dominos
finding the cause: Ask: Why did this happen?

Practice questions

In 'It snowed all night, so school was canceled,' what is the CAUSE?
1. School was canceled.
2. It snowed all night.
3. Students stayed home.
4. It was cold.
Show answer
Answer: It snowed all night.
The snow is WHY school was canceled — that makes 'It snowed all night' the cause.
The result of a cause is called the ___.
Show answer
Answer: effect
The effect is what HAPPENS as a result of the cause — the consequence or outcome.
The word 'because' often signals a cause.
Show answer
Answer: True
'Because' introduces the reason something happened — it signals the cause.
In 'She ate too much candy, so she felt sick,' what is the EFFECT?
1. She ate too much candy.
2. She felt sick.
3. The candy was sweet.
4. She went to the store.
Show answer
Answer: She felt sick.
Feeling sick is the RESULT of eating too much candy — that makes it the effect.
A single cause can only ever have one effect.
Show answer
Answer: False
One cause can lead to MANY effects. A heavy rain might cancel a game, cause floods, and water the gardens all at once!

Fun facts

The phrase 'cause and effect' is used in science, history, math, and everyday life — it is one of the most universal thinking skills humans use!
Every decision you make creates a cause and effect chain — like a line of dominos falling, one action leads to another and another!

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