4th Grade Science Flashcards: Show Wavelength And Amplitude

What this deck covers

This deck focuses on Show Wavelength And Amplitude, giving you a quick way to review the definitions, rules, and examples that matter most for 4th Grade Science.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Flashcard 1: Which measurement is vertical on a wave model: wavelength or amplitude?

Answer: Amplitude is the vertical measurement. Amplitude measures up-down displacement from rest.

Flashcard 2: If the wave height is $10$ cm, what is the amplitude?

Answer: $5$ cm. Amplitude = wave height $\div 2 = 10 \div 2$.

Flashcard 3: Which points do you measure between to find wavelength on a transverse wave?

Answer: Crest to crest (or trough to trough) on consecutive waves. Matching points ensure you measure exactly one complete wave.

Flashcard 4: What is amplitude in a wave model?

Answer: Maximum distance from the rest position to a crest or trough. Amplitude measures the wave's strength or energy.

Flashcard 5: What is a crest on a transverse wave model?

Answer: The highest point of the wave above the rest position. Crests represent maximum positive displacement.

Flashcard 6: What is wavelength in a wave model?

Answer: Distance between matching points on consecutive waves (crest to crest). Wavelength measures the repeating pattern's length.

Flashcard 7: Identify the correct definition: wavelength is measured parallel or perpendicular to travel?

Answer: Parallel to the direction the wave travels (along the wave). Wavelength follows the wave's propagation direction.

Flashcard 8: What are two correct ways to measure one wavelength on the same wave model?

Answer: Crest to crest or trough to trough (consecutive matching points). Both methods span one complete wave cycle.

Flashcard 9: What is the amplitude if the rest position is at $0$ cm and a crest is at $4$ cm?

Answer: $4$ cm. Distance from rest ($0$ cm) to peak ($4$ cm) is $4$ cm.

Flashcard 10: What is the amplitude if the rest position is at $0$ cm and a trough is at $-3$ cm?

Answer: $3$ cm. Distance from rest ($0$ cm) to trough ($-3$ cm) is $3$ cm.

Flashcard 11: Which two matching points can you measure between to find wavelength?

Answer: Crest to crest (or trough to trough). Matching points ensure you measure one complete wave cycle.

Flashcard 12: Identify the amplitude if the rest position is at $0\text{ cm}$ and a trough is at $-5\text{ cm}$.

Answer: $5\text{ cm}$. Amplitude is the absolute distance from rest to trough.

Flashcard 13: Find and correct the mistake: 'Amplitude is measured from crest to trough.'

Answer: Correct: Amplitude is from rest position to crest or trough. Crest-to-trough is wave height, not amplitude.

Flashcard 14: Which option best shows wavelength on a diagram: vertical arrow or horizontal arrow?

Answer: Horizontal arrow between matching points (for example, crest to crest). Wavelength spans horizontally between wave repeats.

Flashcard 15: What does a larger amplitude show about how the wave moves?

Answer: The wave has taller crests and deeper troughs (greater displacement). Larger amplitude means more energy and movement.

Flashcard 16: Find the amplitude if the distance from the rest position to a crest is $3\text{ cm}$.

Answer: $3\text{ cm}$. Distance from rest to peak equals amplitude.

Flashcard 17: Choose the correct wavelength measure: crest-to-trough or crest-to-crest?

Answer: Crest-to-crest. Wavelength must be between matching points, not opposites.

Flashcard 18: Identify the wavelength if crest-to-crest distance is $12\text{ cm}$.

Answer: $12\text{ cm}$. Crest-to-crest distance equals one wavelength.

Flashcard 19: Find the wave height (crest-to-trough) if the amplitude is $4\text{ cm}$.

Answer: $8\text{ cm}$. Wave height equals twice the amplitude: $2 \times 4 = 8$.

Flashcard 20: Identify the correct formula for amplitude using wave height (crest-to-trough).

Answer: Amplitude $= \frac{\text{wave height}}{2}$. Wave height is twice the amplitude.

Flashcard 21: What does a shorter wavelength show about the spacing of wave cycles?

Answer: The wave cycles are closer together. Shorter wavelength means more waves fit in the same space.

Flashcard 22: Identify the amplitude if the rest position is at $0\text{ cm}$ and a crest is at $+6\text{ cm}$.

Answer: $6\text{ cm}$. Measure from rest position ($0$) to peak ($+6$).

Flashcard 23: What is the relationship between wave height and amplitude on a wave diagram?

Answer: Wave height is $2 \times$ amplitude. Total vertical distance equals twice the amplitude.

Flashcard 24: Identify the correct statement: amplitude is measured crest-to-trough or rest-to-crest.

Answer: Amplitude is measured rest-to-crest (or rest-to-trough). Amplitude measures from center to peak, not peak to valley.

Flashcard 25: Identify the line used as the starting reference for measuring amplitude on a wave diagram.

Answer: The rest position (midline or equilibrium line). The center line where the wave would be if undisturbed.

Flashcard 26: Which measurement is vertical on most wave diagrams: amplitude or wavelength?

Answer: Amplitude is vertical. Measures perpendicular to the direction of wave travel.

Flashcard 27: Which measurement is horizontal on most wave diagrams: amplitude or wavelength?

Answer: Wavelength is horizontal. Measures along the direction of wave travel.

Flashcard 28: Which two points on a wave show one wavelength: trough-to-trough or trough-to-rest?

Answer: Trough-to-trough shows one wavelength. One complete wave cycle spans from valley to valley.

Flashcard 29: Which two points on a wave show one wavelength: crest-to-crest or crest-to-rest?

Answer: Crest-to-crest shows one wavelength. One complete wave cycle spans from peak to peak.

Flashcard 30: What is wavelength in a wave model (what distance does it measure)?

Answer: Wavelength is the distance of one full wave cycle (crest to crest). Measures the length of one complete wave pattern.