WHAT I KNOW (Pre-Test) Directions: Write the letter of the answer that BEST completes each sentence. 1. is/are one of the most valuable abiotic factors in an ecosystem. A. Plants D. soil C. community B. insects 2. Which of the following indicates to the public the health risk of the air at a location and time? A. Air Quality Index C. Air Safety Index B. Atmospheric Safety Quotient D. Clean Air Index 3. How does increasing nitrates impact stream health? A. Excessive growth of algae C. increased oxygen B. increased water clarity D. none of the choices 4. What two gases are found throughout all layers of the atmosphere? A. Nitrogen and carbon dioxide C. Nitrogen and oxygen B. Oxygen and carbon dioxide, makaka answer po nyan ng tama ibrabrainliest ko po and follow then heart ko po mga answer nya then answeran ko rin po question nya salamat tignan nyo nalang po sa pic ung question salamat po godblesss kailangan ko na po asap kaya pakibilisan po.

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WHAT I KNOW (Pre-Test) Directions: Write the letter of the answer that BEST completes each sentence. 1. is/are one of the most valuable abiotic factors in an ecosystem. A. Plants D. soil C. community B. insects 2. Which of the following indicates to the public the health risk of the air at a location and time? A. Air Quality Index C. Air Safety Index B. Atmospheric Safety Quotient D. Clean Air Index 3. How does increasing nitrates impact stream health? A. Excessive growth of algae C. increased oxygen B. increased water clarity D. none of the choices 4. What two gases are found throughout all layers of the atmosphere? A. Nitrogen and carbon dioxide C. Nitrogen and oxygen B. Oxygen and carbon dioxide


makaka answer po nyan ng tama ibrabrainliest ko po and follow then heart ko po mga answer nya then answeran ko rin po question nya salamat tignan nyo nalang po sa pic ung question salamat po godblesss kailangan ko na po asap kaya pakibilisan po.​​

Answer:

1. D. soil

2. A.

3. D.

4. B.

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