Home Free Printables Science 8th Grade 8th Grade Science — Waves — Using v = fλ with Real Numbers Preview — download the full PDF for print-quality output
Science 8th Grade Ages 13–14
8th Grade Science — Waves — Using v = fλ with Real Numbers A free 1-page hands-on science activity for 8th Grade (ages 13–14). It practices science, observation, inquiry. Download the PDF with no account and no email.
Free printable using v = fλ with real numbers science worksheet. Wave speed is set by the medium, so within one medium frequency and wavelength trade off exactly. Sound travels at about 340 m/s in air, so a 170 Hz note has a 2 m wavelength while a 3,400 Hz note has a 0.1 m one. Move that same sound into water, where the speed is about 1,500 m/s, and the frequency is unchanged — the source still vibrates at the same rate — so the wavelength must grow by more than four times. Part of the Waves lesson track. For 8th Grade Science (ages 13–14).
Skills Covered 63,000+ pages opened here since February — no account, no card, 3 a day
Free PDF Download · Print Unlimited Copies
Lab Report — Using v = fλ with Real Numbers SCIENCE · 8TH GRADE Name Date Complete this lab report for your investigation. Purpose / Research Question: Which liquid keeps a cut apple from turning brown? Materials: apple, knife (adult), lemon juice, water, milk, vinegar, 4 saucers, timer Hypothesis (If... then... because...): Write your own: If I change ___, then ___ because ___ Independent Variable: The liquid brushed onto the apple slice Dependent Variable: How brown the slice looks after 1 hour Procedure: 1. Cut four slices of the same size 2. 3. Leave all four on saucers in the same place 4. 5. Score the browning from 0 to 5 Data / Results: Liquid 20 min 60 min None (control) Lemon juice Water Conclusion: What would you do differently if you ran it again? www.littleactivity.com 8th Grade · Science
Upgrade to the full Science pack 50+ worksheets for 8th Grade organized by skill level with answer keys — less than $0.22 per worksheet.
Get the Full Pack — $10.99
How to Use This Worksheet Step 1
Download PDF Click the download button above. The PDF is generated instantly in your browser — no waiting.
Step 2
Print at Home Print on standard A4 or US Letter paper. Works with any home printer — color or black & white.
Step 3
Learn & Play Give it to your child with crayons, pencils, or markers. Reprint as many times as needed!
More Science Printables Click any worksheet to view and download for free
Browse More Free Worksheets 📦
Love this worksheet? Get the full pack! 50+ science worksheets for 8th Grade — organized by skill level, with answer keys and progress tracking.
AI-powered activity ideas to keep your little ones learning, playing, and growing every day.
© 2026 LittleActivity. All rights reserved.
Built for families who love playtime
Lab Report — Using v = fλ with Real Numbers SCIENCE · 8TH GRADE Name Date Complete this lab report for your investigation. Purpose / Research Question: Which liquid keeps a cut apple from turning brown? Materials: apple, knife (adult), lemon juice, water, milk, vinegar, 4 saucers, timer Hypothesis (If... then... because...): Write your own: If I change ___, then ___ because ___ Independent Variable: The liquid brushed onto the apple slice Dependent Variable: How brown the slice looks after 1 hour Procedure: 1. Cut four slices of the same size 2. 3. Leave all four on saucers in the same place 4. 5. Score the browning from 0 to 5 Data / Results: Liquid 20 min 60 min None (control) Lemon juice Water Conclusion: What would you do differently if you ran it again? www.littleactivity.com 8th Grade · Science
Sound Vibration Experiment SCIENCE · 1ST GRADE Name Date Fill in this page as you do your investigation. What are we finding out? How do vibrations make sound? What we need: tuning fork, rubber band, drum, cup of water, rice What I think will happen: Write your own: If I change ___, then ___ because ___ What I will change: Object that is vibrating What I will watch: Whether you can see, feel, or hear the vibration What to do: 1. Strike the tuning fork — touch water surface 2. Put rice on a drum — tap the drum 3. Pluck a rubber band — watch it move 4. Hold the tuning fork to your hand — feel it 5. Record what you see, feel, and hear What we saw: Object See It? Feel It? Hear It? Tuning fork Water splashes Tickles hand Humming sound Drum + rice Rubber band What I learned: Sound is made by... I could see vibrations when... www.littleactivity.com 1st Grade · Science
Diagram — Light Spectrum SCIENCE · 1ST GRADE Name Date Label the diagram. Use the word bank below. Light Spectrum Prism White Light Red Orange Yellow Green Blue Violet Word Bank: green yellow orange red blue violet Which part matters most, and why? www.littleactivity.com 1st Grade · Science Lab Report — Pitch SCIENCE · 1ST GRADE Name Date Fill in this page as you do your investigation. What are we finding out? What makes sounds high or low? What we need: rubber bands (thick & thin), glasses with water, ruler What I think will happen: Write your own: If I change ___, then ___ because ___ What I will change: Size, length, or thickness of the object What I will watch: Whether the pitch is high or low What to do: 1. Pluck a thick rubber band — note the pitch 2. 3. Tap glasses with different water levels 4. 5. Record your observations What we saw: Object Thick/Thin? Pitch (high/low) Thick rubber band Thin rubber band Glass — lots of water What I learned: Now change one other thing and predict what happens. www.littleactivity.com 1st Grade · Science
Lab Report — Volume SCIENCE · 1ST GRADE Name Date Fill in this page as you do your investigation. What are we finding out? What makes sounds loud or soft? What we need: ruler, rubber band, drum/pot, pencil, cup What I think will happen: Write your own: If I change ___, then ___ because ___ What I will change: How hard you pluck, hit, or tap the object What I will watch: How loud or soft the sound is What to do: 1. Pluck a rubber band gently — listen 2. 3. Tap the drum softly, then loudly 4. 5. Record your results in the table What we saw: Object Soft Tap Hard Tap Rubber band Drum/pot Ruler on desk What I learned: What could have made this test unfair? www.littleactivity.com 1st Grade · Science
Lab Report — How Does Sound Travel? SCIENCE · 1ST GRADE Name Date Fill in this page as you do your investigation. What are we finding out? How does sound travel through different materials? What we need: tuning fork, string phone (cups + string), water, desk, ruler What I think will happen: Write your own: If I change ___, then ___ because ___ What I will change: Material sound travels through (air, string, water, desk) What I will watch: How loud or clear the sound is What to do: 1. Strike the tuning fork and listen in air 2. Press the fork against the desk and listen 3. Put the fork in water and observe 4. Use the string phone and listen 5. Compare results in your table What we saw: Material Loud/Soft? Clear/Muffled? Air Desk (solid) Water Trial 4 What I learned: Sound travels best through... because... www.littleactivity.com 1st Grade · Science
Lab Report — Transparent, Opaque, and Translucent SCIENCE · 1ST GRADE Name Date Fill in this page as you do your investigation. What are we finding out? Which material is best for the job — and why? What we need: paper, foil, cloth, plastic, wood block, water, weights What I think will happen: If I test each material, then the strongest one will be... What I will change: The material being tested What I will watch: Whether it is hard, bendy, waterproof or strong What to do: 1. Feel each material and describe it 2. 3. Drip water on each and watch 4. 5. Record what you found What we saw: Material Bendy or stiff? Waterproof? Foil Paper Wood Trial 4 What I learned: The best material for a raincoat would be... because... www.littleactivity.com 1st Grade · Science
