What kind of tide will occur when the moon is at positions A, C, D and F?

1. What phases of the moon would someone on Earth see when the moon is at position A?

A) new moon

B) full moon

C) first quarter

D) third quarter

A) new moon

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2. What phases of the moon would someone on Earth see when the moon is at position C?

A) full moon

B) first quarter

C) third quarter

D) new moon

B) first quarter

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3. What kind of tide (spring or neap) will occur when the moon is at position D?

A) neap

B) spring

B) spring

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4. What kind of tide (spring or neap) will occur when the moon is at position F?

A) spring

B) neap

B) neap

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The main use of litmus is to test whether a solution is acidic or basic. Blue litmus paper turns red under acidic conditions and red litmus paper turns blue under basic or alkaline conditions, with the color change occurring over the pH range 4.5–8.3 at 25 °C (77 °F).