Crossword puzzle for grade 7 students with clues and a word bank.

I'll solve this crossword puzzle step by step, working through each clue and matching it with the word bank.

Let me start by analyzing the clues and the word bank:

Word Bank:
- beach
- ice cream
- nanana
- n
- equations
- COTTON-CANDY
- plastic
- roman Colosseum
- air
- nitrogen
- of
- 105
- deli

Now let me work through each clue:

ACROSS:

3. "roman wha" - This looks like it's asking for "roman Colosseum" (the word bank has this)

5. "one clue one starts with" - Looking at the word bank, "n" could fit here as it's a single letter that starts words

8. "something that rhymes with banana" - From the word bank, "nanana" rhymes with banana

9. "what air is made" - Air is made of nitrogen (from word bank)

11. "science is what" - Science involves "equations" (from word bank)

13. "what is in our water" - Water can contain various things, but looking at remaining options, this might be tricky

DOWN:

1. "air is made with" - Air is made with "nitrogen" or "of" - need to check length

2. "the best snack to eat in summer" - "ice cream" fits perfectly

4. "something you have to do during mathematics" - You work with "equations" in math

6. "where do you in summer" - People go to the "beach" in summer

7. "candy most people like is..." - "COTTON-CANDY" from the word bank

10. "15x7=" - Let me calculate: 15 × 7 = 105

12. "guess the answer" - This is vague, but could be "deli" based on elimination

Let me verify the calculations:
- 15 × 7 = 105 ✓

Now I need to match these to the grid positions. Let me think about which answers fit where based on the structure:

Looking at the clues more carefully and considering typical crossword patterns:

Final Answer:

Here are the solutions to fill in the crossword:

Across:
3. ROMAN COLOSSEUM
5. N
8. NANANA
9. NITROGEN
11. EQUATIONS
13. PLASTIC (or could be another answer based on grid)

Down:
1. OF
2. ICE CREAM
4. EQUATIONS
6. BEACH
7. COTTON-CANDY
10. 105
12. DELI

The key mathematical calculation verified: 15 × 7 = 105