Grade 7 Integrated Science worksheet focusing on the interdependence of living things and their needs.

To solve this worksheet, we need to look at the context of each sentence and choose the word from the box that makes the most sense scientifically and grammatically. Here is the step-by-step breakdown:

1. "All living things \_\_\_\_\_\_ one another."
* Living things in an ecosystem rely on each other. The word need fits best here.

2. "The plants produce oxygen, which animals need to \_\_\_\_\_\_."
* Animals use oxygen for respiration. The correct verb is breathe.

3. "The \_\_\_\_\_\_ produce carbon dioxide, which the plants need to breathe."
* Who produces carbon dioxide? Animals do. Looking at the box, animals is the right choice.

4. "Plants are also \_\_\_\_\_\_ to many animals."
* Plants provide food and shelter, so they are useful or necessary. The word important isn't in the box, but looking ahead, plants are a source of food. Let's look at the next part. Actually, let's look at the options again. "Plants are also food to many animals" makes sense, but let's check the next blank.
* Let's re-read carefully: "Plants are also \_\_\_\_\_\_ to many animals. The plants get \_\_\_\_\_\_ from the \_\_\_\_\_\_, and the animals that eat the plants \_\_\_\_\_\_ that energy."
* Let's hold on the "Plants are also..." sentence. Maybe it's shelter? Or food? Let's look further down. "Some animals are food to \_\_\_\_\_\_ animals." That definitely needs other.
* Let's look at "Plants can also provide \_\_\_\_\_\_ to animals." This is likely shelter.
* So, if "shelter" is used later, what fits "Plants are also \_\_\_\_\_\_ to many animals"? It could be food. Let's try that.

*Let's restart the middle section to be sure:*
* "The plants get \_\_\_\_\_\_ from the \_\_\_\_\_\_." Plants get energy from the sun. So, energy and sun.
* "...and the animals that eat the plants \_\_\_\_\_\_ that energy." Animals obtain or receive energy. The word get fits perfectly.
* So far: Plants get energy from the sun, animals get that energy.

*Now back to: "Plants are also \_\_\_\_\_\_ to many animals."*
* If plants give energy/food, maybe the word is food? Let's see if food is used elsewhere.
* "Some animals are food to \_\_\_\_\_\_ animals." -> other.
* "Plants can also provide \_\_\_\_\_\_ to animals." -> shelter.
* So, "Plants are also food to many animals" seems correct.

5. "This is necessary for \_\_\_\_\_\_ to exist."
* The whole system supports living things. The word life fits here.

6. "This helps animals \_\_\_\_\_\_ themselves from bad \_\_\_\_\_\_, or from other \_\_\_\_\_\_ animals."
* Animals protect themselves. So, protect.
* From bad what? weather.
* From other what kind of animals? Animals that hurt them. dangerous.

7. "If we do not take \_\_\_\_\_\_ of the living things in our environment, live would be very \_\_\_\_\_\_."
* The phrase is "take care of". So, care.
* If we don't take care, life would be bad/hard. The remaining word is different? No, that doesn't fit well. Let's check the remaining words.
* Used so far: need, breathe, animals, food, energy, sun, get, life, protect, weather, dangerous, care.
* Remaining words: other, different.
* Wait, I used other in "other animals". Let's re-check that sentence: "from other \_\_\_\_\_\_ animals." Yes, dangerous fits there.
* Let's re-read the first sentence: "All living things \_\_\_\_\_\_ one another." I used need.
* Let's re-read the last sentence: "live would be very \_\_\_\_\_\_." (Note: The text says "live", probably a typo for "life").
* What word is left? I have used: need, breathe, animals, food, energy, sun, get, life, protect, weather, dangerous, care, other.
* The only word left is different. Does "life would be very different" make sense? Yes, it means the world would change drastically.

Let's double check the assignment of words:
1. need: All living things need one another. (Correct)
2. breathe: ...animals need to breathe. (Correct)
3. animals: The animals produce carbon dioxide... (Correct)
4. food: Plants are also food to many animals. (Correct)
5. energy: The plants get energy... (Correct)
6. sun: ...from the sun... (Correct)
7. get: ...animals that eat the plants get that energy. (Correct)
8. life: This is necessary for life to exist. (Correct)
9. protect: This helps animals protect themselves... (Correct)
10. weather: ...from bad weather... (Correct)
11. other: ...or from other dangerous animals? Wait.
* Sentence: "from other \_\_\_\_\_\_ animals."
* If I put dangerous there, it reads "from other dangerous animals".
* Then what is left for the last blank? different. "Life would be very different."
* Let's check if other was used. Ah, I missed assigning other explicitly in my list above, but I used it in the phrase "other dangerous animals".
* Let's look at the box again: `other`, `different`, `protect`, `breathe`, `sun`, `animals`, `dangerous`, `need`, `weather`, `food`, `energy`, `life`, `get`, `shelter`, `care`.
* I haven't used shelter yet!
* Let's re-evaluate: "Plants can also provide \_\_\_\_\_\_ to animals."
* I previously thought this was shelter. Yes, plants provide shelter.
* So where did food go? "Plants are also food to many animals."
* Where did other go? "Some animals are food to other animals."
* Where did dangerous go? "...from other dangerous animals."
* Where did different go? "Life would be very different."

Let's trace the full paragraph with these choices:
"All living things need one another. The plants produce oxygen, which animals need to breathe. The animals produce carbon dioxide, which the plants need to breathe. Plants are also food to many animals. The plants get energy from the sun, and the animals that eat the plants get that energy. Some animals are food to other animals. This is necessary for life to exist. Plants can also provide shelter to animals. This helps animals protect themselves from bad weather, or from other dangerous animals. If we do not take care of the living things in our environment, life would be very different."

This uses all words correctly and makes logical sense.

Final Answer:
1. need
2. breathe
3. animals
4. food
5. energy
6. sun
7. get
8. other
9. life
10. shelter
11. protect
12. weather
13. dangerous
14. care
15. different