Question

1. choose the correct answer.

how do farmers use water more efficiently?
by watering crops during the hottest part of the day
by using drip irrigation systems
by not growing any crops at all
by using more fertilizers on crops

1. choose the correct answer.

what is wastewater?
water from rivers and lakes
rainwater
dirty water that has been used
water that is safe to drink

Explanation:

Question 17

• Watering during the hottest part of the day leads to more evaporation, so it's inefficient.
• Drip irrigation systems deliver water directly to the roots, minimizing waste through evaporation or runoff, so this is an efficient way.
• Not growing crops is not a practical solution for farmers to use water efficiently as they need to grow crops for production.
• Using more fertilizers doesn't relate to water efficiency; it's about crop nutrition.

• Water from rivers and lakes is usually natural water, not necessarily wastewater.
• Rainwater is fresh, unused water from precipitation, not wastewater.
• Wastewater is water that has been used and has become dirty, containing contaminants from various uses like household, industrial, etc.
• Water that is safe to drink is potable water, not wastewater.

Answer:

B. by using drip irrigation systems

Question 18