PH Level

Use the information below to answer the question. Two students are looking at a graph showing the change in ocean pH over time. The students have two different opinions on how natural ocean ecosystems are impacted. Mariah: The ocean water is becoming more acidic. This will harm organisms that live in the water. Jaafar: The ocean is becoming more basic. This will harm organisms that live in the water. Which student is most accurate?

• Mariah

• Jaafar

• Both are correct.

• Neither are correct.

Tags

NGSS.MS-LS2-4

Use the information below to answer the question. Two students are looking at a graph showing the change in ocean pH over time. The students have two different opinions on how natural ocean ecosystems are impacted. Mariah: The ocean water is becoming more acidic. This will harm organisms that live in the water. Jaafar: The ocean is becoming more basic. This will harm organisms that live in the water. Which might best describe how sea creatures are impacted by changing ocean water?

• Acidic water may dissolve the shells of many ocean creatures.

• Neutral ocean water warms up more quickly.

• Basic ocean water cannot hold as much oxygen.

• Neutral ocean water cannot dissolve as much salt as freshwater.

Tags

NGSS.MS-LS2-4

What is the pH of water?

• 1 - 4

• 4 - 6

• 7

• 10 - 14

A liquid that is safe to drink tastes sour. What is the most likely pH?

• 1

• 5

• 7

• 12

Which statement is most accurate about drain cleaner?

• It has the same pH as water.

• It is a weak acid.

• It is a weak base (alkaline).

• It is a strong base (alkaline).

What are the characteristics of an acidic solution? Select ALL that apply.

• sour taste

• bitter taste

• feels slippery

• turns blue litmus paper red

• reacts strongly with metals

What are the characteristics of a basic or alkaline solution? Select ALL that apply.

• sour taste

• bitter taste

• turns red litmus paper blue

• has a pH below 7

• used in cleaning products and detergents

Which does NOT describe how the properties of vinegar compare to water?

• The pH of vinegar is less than water.

• Water is neutral and vinegar is acidic.

• Vinegar will taste bitter compared to water.

• Vinegar will turn cabbage juice indicators red.

The pH scale is a range from:

• 7

• 0-14

• 5

• 20

Bleach is a strong base, what is the pH level of bleach?

• 13

• 14

• 1

• 2