7.2

Place where new ocean crust forms

• magnetic reversal

• mid-ocean ridge

• normal polarity

• reversed polarity

• seafloor spreading

List the steps of the scientific method

d

e

f

c

b

a

Draw conclusions

Conduct experiment

Form a hypothesis

Communicate results

Analyze results

Ask a question

Tags

NGSS.MS-PS2-5

What is the pH level of a neutral solution?

• 7.0

• 7.2

• 7.4

• 7.6

Which of the following pH levels indicates a basic solution?

• 6.8

• 7.0

• 7.2

• 7.4

If a solution has a pH of 7.2, what can be inferred about its acidity?

• It is acidic

• It is neutral

• It is slightly basic

• It is highly basic

What is the pH of pure water at 25°C?

• 6.8

• 7.0

• 7.2

• 7.4

A solution with a pH of 7.2 is considered to be:

• Acidic

• Neutral

• Slightly basic

• Highly basic

Which of the following pH values is closest to that of human blood?

• 6.8

• 7.2

• 7.4

• 7.6

Tags

NGSS.HS-LS1-3

What is the typical pH range of seawater?

• 6.5 to 7.0

• 7.2 to 7.8

• 8.0 to 8.5

• 8.5 to 9.0

Tags

NGSS.MS-PS1-2

If a substance has a pH of 7.2, it is most likely:

• An acid

• A base

• Neutral

• A buffer