Forces that shape our Australian coast

What is the primary cause of headlands, islands, and atolls?
A) Erosion from wave action
B) Movement of sand by currents
C) Tectonic plate movements
D) Sea level rise

• A

• B

• C

• D

During which phase of the tide are tidal currents strongest?
A) High tide
B) Low tide
C) Mid tide (transition between high and low)
D) Neap tide

• A

• B

• C

• D

What is the best time for snorkelling based on tidal currents?
A) Mid tide
B) Just after high or low tide
C) During spring tide
D) During stormy weather

• A

• B

• C

• D

What are incoming tidal currents called?
A) Ebbing currents
B) Flooding currents
C) Spring currents
D) Neap currents

• A

• B

• C

• D

Which of the following contributes to higher sea levels?
A) Increased glacial formation
B) Colder global temperatures
C) Interglacial periods and glacier retreat
D) Reduced carbon emissions

• A

• B

• C

• D

What is the current geological period we are in?
A) Jurassic
B) Pleistocene
C) Holocene
D) Cambrian

• A

• B

• C

• D

What causes stronger tidal currents during spring tides?
A) The sun's gravity cancels out the moon's gravity
B) The moon is at a right angle to the Earth
C) Combined gravitational pull of the sun and moon
D) The Earth is tilted away from the sun

• A

• B

• C

• D

What effect do prevailing winds have on coastlines?
A) Cause glacial melting
B) Erosion and accretion
C) Increase sea level
D) Decrease tidal currents

• A

• B

• C

• D

What occurs during neap tides?
A) Strongest tidal currents
B) Largest difference in tidal height
C) Best time for deep-sea fishing

D) Weaker tidal currents due to smaller variation in tide

• A

• B

• C

• D

How does movement of sand and water shape coastlines?
A) Through erosion and accretion

B) By forming glaciers
C) By changing tectonic boundaries
D) By increasing volcanic activity

• A

• B

• C

• D