Understanding pH in Our World

What does the pH scale measure?

• Temperature

• Acidity or alkalinity

• Weight

• Speed

What is the pH of pure water?

• 0

• 7

• 14

• 10

Why is pH important for soil health?

• It helps plants grow by providing nutrients.

• It determines the color of the soil.

• It makes the soil smell nice.

• It keeps the soil warm.

What pH level is considered safe for drinking water?

• 0-1

• 6.5-8.5

• 10-12

• 13-14

How does pH affect human health?

• It changes our hair color.

• It affects digestion and skin health.

• It makes us taller.

• It changes our voice.

What happens to fish if the pH of water is too low or too high?

• They grow faster.

• They may get sick or die.

• They change color.

• They become invisible.

What is the pH range of acidic substances?

• 0-6

• 7-14

• 8-10

• 11-13

Which of the following is a basic (alkaline) substance?

• Lemon juice

• Vinegar

• Baking soda

• Orange juice

Why is it important to monitor the pH of aquatic ecosystems?

• To make the water look pretty.

• To ensure the survival of aquatic life.

• To keep the water warm.

• To make the water taste sweet.

What tool is commonly used to measure pH?

• Thermometer

• pH meter

• Ruler

• Stopwatch