Cause and Effect — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. The school bus was late because there was heavy traffic on the road.
The word 'because' connects the effect (bus was late) to the cause (heavy traffic).
2. Jake left the gate open, so the dog ran out of the yard.
The word 'so' signals the effect (dog ran out) that followed the cause (gate left open).
3. Since the power went out, we used flashlights to see in the dark.
The word 'Since' introduces the cause (power went out) that led to the effect (used flashlights).
4. She watered the garden every day. Therefore, the tomatoes grew big and red.
The word 'Therefore' introduces the effect (tomatoes grew big) caused by watering every day.
5. The glass broke because it fell off the kitchen counter.
The word 'because' connects the effect (glass broke) to the cause (fell off the counter).
6. He did not wear sunscreen, so his skin got sunburned at the beach.
The word 'so' signals the effect (got sunburned) that followed the cause (no sunscreen).
7. Since the store was having a sale, many people came to shop.
The word 'Since' introduces the cause (store having a sale) that led to the effect (many people came).
8. The team practiced all season. As a result, they won the championship.
The phrase 'As a result' signals the effect (won the championship) that followed the cause (practiced all season).
9. She stayed up too late, so she was tired at school the next day.
The word 'so' signals the effect (tired at school) that followed the cause (stayed up too late).
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
The alarm did not go off.
→ She woke up late for school.
The floor got dirty.
Strong winds blew all night.
→ A tree branch fell down.
A tree branch fell down.
The dog tracked mud inside.
→ The floor got dirty.
His friend was grateful.
He shared his lunch with a friend.
→ His friend was grateful.
She woke up late for school.
Match each item with its correct partner. The correct matches are: The alarm did not go off. → She woke up late for school.; Strong winds blew all night. → A tree branch fell down.; The dog tracked mud inside. → The floor got dirty.; He shared his lunch with a friend. → His friend was grateful..