Cause and Effect — Answer Key
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
The cat hid under the bed therefore it was a sunny day.
Corrected: The cat hid under the bed because there was loud thunder.
The corrected sentence is: "The cat hid under the bed because there was loud thunder.". The original sentence "The cat hid under the bed therefore it was a sunny day." contained an error that needed to be fixed.
2. Fix the sentence:
The lights turned on since there was a power outage.
Corrected: The lights turned off since there was a power outage.
The corrected sentence is: "The lights turned off since there was a power outage.". The original sentence "The lights turned on since there was a power outage." contained an error that needed to be fixed.
3. Fix the sentence:
She scored a goal so she practiced every day after school.
Corrected: She practiced every day after school so she scored a goal.
The corrected sentence is: "She practiced every day after school so she scored a goal.". The original sentence "She scored a goal so she practiced every day after school." contained an error that needed to be fixed.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. The baby cried because she was hungry.
The word 'because' connects the effect (baby cried) to its cause (she was hungry).
2. He forgot his lunch, so his mom brought it to school.
The word 'so' signals the effect (mom brought lunch) that followed the cause (he forgot his lunch).
3. The road was icy. Therefore, the bus drove slowly.
The word 'Therefore' introduces the effect (bus drove slowly) caused by the icy road.
4. Since it was her birthday, she got many presents.
The word 'Since' introduces the cause (her birthday) that led to the effect (got many presents).
Part C: True or False?
Read each statement. Circle True or False.
1. The word so can signal an effect that follows a cause.
True False
The word 'so' is a signal word that introduces an effect following a cause.
2. A cause is what happens as a result of something else.
True False
A cause is the reason something happens, not the result. The effect is what happens as a result.
3. The word therefore is a cause-and-effect signal word.
True False
The word 'therefore' is a signal word that introduces an effect or result.