Grade 2 worksheet comparing weights using a balance scale.

Problem Overview:

The worksheet involves using a balance scale to determine which object is heavier or lighter. The task requires analyzing the images of the balance scales and circling the correct answers based on the tilt of the scales.

Solution Explanation:

#### Step 1: Understand the Balance Scale
- A balance scale compares the weights of two objects.
- If one side tilts downward, the object on that side is heavier.
- If one side tilts upward, the object on that side is lighter.
- If the scale remains balanced (no tilt), the objects weigh the same.

#### Step 2: Analyze Each Image

##### Image 1: Apple vs. Pencil Case
- The scale tilts downward on the side with the pencil case.
- This means the pencil case is heavier than the apple.
- Therefore, the apple is lighter.
- Correct Answer: Apple

##### Image 2: Pitcher vs. Lamp
- The scale is balanced (no tilt).
- This means the pitcher and the lamp weigh the same.
- Correct Answer: Same

##### Image 3: Apple vs. Tennis Ball
- The scale tilts downward on the side with the apple.
- This means the apple is heavier than the tennis ball.
- Therefore, the tennis ball is lighter.
- Correct Answer: Tennis ball

##### Image 4: Tennis Ball vs. Book
- The scale tilts downward on the side with the book.
- This means the book is heavier than the tennis ball.
- Therefore, the tennis ball is lighter.
- Correct Answer: Tennis ball

##### Image 5: Book vs. Lamp
- The scale tilts downward on the side with the lamp.
- This means the lamp is heavier than the book.
- Therefore, the book is lighter.
- Correct Answer: Book

##### Image 6: Pencil Case vs. Book
- The scale tilts downward on the side with the pencil case.
- This means the pencil case is heavier than the book.
- Therefore, the book is lighter.
- Correct Answer: Book

#### Step 3: Answer the Final Questions
1. Which is heavier: the pitcher or the pencil case?
- From Image 1, the pencil case is heavier than the apple.
- From Image 2, the pitcher weighs the same as the lamp.
- Comparing these, the pencil case is heavier than the pitcher.
- Answer: Pencil case

2. Which is lighter: the book or the apple?
- From Image 3, the tennis ball is lighter than the apple.
- From Image 4, the tennis ball is lighter than the book.
- Comparing these, the apple is heavier than the book.
- Answer: Book

Final Answers:

1. Heavier: Pencil case
2. Lighter: Book

Boxed Final Answer:

\[
\boxed{\text{Pencil case, Book}}
\]