Cause and Effect — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. The puppy chewed the shoe because no one gave it a toy to play with.
The word 'because' connects the effect (puppy chewed shoe) to the cause (no toy to play with).
2. Maria studied hard for her test, so she earned a high score.
The word 'so' signals the effect (earned a high score) that followed the cause (studied hard).
3. Since the wind blew hard, many leaves fell off the trees.
The word 'Since' introduces the cause (wind blew hard) that led to the effect (leaves fell).
4. The teacher turned off the lights. Therefore, the class became quiet.
The word 'Therefore' introduces the effect (class became quiet) caused by the teacher turning off the lights.
5. He left his bike in the rain, so the chain began to rust.
The word 'so' signals the effect (chain began to rust) that followed the cause (bike left in rain).
6. The soil was very dry because it had not rained for two weeks.
The word 'because' connects the effect (dry soil) to the cause (no rain for two weeks).
7. Since the library was closed, we read books at home instead.
The word 'Since' introduces the cause (library was closed) that led to the effect (read at home).
8. She practiced piano every day. As a result, she played the song perfectly.
The phrase 'As a result' signals the effect (played perfectly) that followed the cause (practiced every day).
9. The pond froze over because the temperature dropped below freezing.
The word 'because' connects the effect (pond froze) to the cause (temperature dropped below freezing).
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 boy forgot his homework.
→ He got a zero on the assignment.
Her stomach hurt.
It rained all morning.
→ The playground was muddy.
Water spilled on the floor.
The kitten knocked over the vase.
→ Water spilled on the floor.
The playground was muddy.
She ate too much candy.
→ Her stomach hurt.
He got a zero on the assignment.
Match each item with its correct partner. The correct matches are: The boy forgot his homework. → He got a zero on the assignment.; It rained all morning. → The playground was muddy.; The kitten knocked over the vase. → Water spilled on the floor.; She ate too much candy. → Her stomach hurt..