Home Free Printables Science 8th Grade 8th Grade Science — Earth Systems — Slab Pull, Not Floating, Drives the Plates Preview — download the full PDF for print-quality output
Science 8th Grade Ages 13–14
8th Grade Science — Earth Systems — Slab Pull, Not Floating, Drives the Plates 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 slab pull, not floating, drives the plates science worksheet. Plates do not drift on a liquid mantle — the mantle is solid rock that creeps over millions of years. The dominant driver is slab pull: oceanic plate that has cooled and grown dense sinks at a subduction zone and drags the rest of its plate behind it, with ridge push at the spreading centre contributing a smaller share. The evidence is in the speeds: plates with long subducting margins, like the Pacific, move several times faster than plates with almost none, like the African. Part of the Earth Systems lesson track. For 8th Grade Science (ages 13–14).
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Lab Report — Slab Pull, Not Floating, Drives the Plates 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...): If the liquid is acidic, then browning will... 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 Trial 4 Conclusion: Whose result was different from yours, and why? www.littleactivity.com 8th Grade · Science
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Lab Report — Slab Pull, Not Floating, Drives the Plates 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...): If the liquid is acidic, then browning will... 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 Trial 4 Conclusion: Whose result was different from yours, and why? www.littleactivity.com 8th Grade · Science
Coding — If & Then — Part 1 SCIENCE · 1ST GRADE Name Date Learn the concept, study the code, then try the challenge! Coding Concepts Coding means writing instructions that a computer can follow step by step. Code Example: // Every program has: // 1. Input — data going in // 2. Process — what to do with it // 3. Output — the result Steps: 2. Plan your solution (algorithm) 5. Debug and improve 3. Write the code 1. Understand the problem 4. Test your code Try It! Write step-by-step instructions to make a peanut butter sandwich. Be specific! Debug Challenge: Your instructions say 'put peanut butter on bread' but the robot puts the jar on the bread! R… My Fix: www.littleactivity.com 1st Grade · Science
Coding — Events — Part 1 SCIENCE · 1ST GRADE Name Date Learn the concept, study the code, then try the challenge! Events & Control Events start your code. Control blocks like loops and if/then make decisions. Code Example: when [space v] key pressed if <touching [edge v]?> then turn (180) degrees end repeat (10) move (10) steps end Steps: 5. Test different event triggers 4. Try 'when key pressed' events 3. Use 'if...then' to check conditions 1. Start with a 'when green flag clicked' event 2. Add a 'forever' loop to keep code running Try It! Make a sprite bounce off the edges using events and if/then blocks. Debug Challenge: My sprite only moves once instead of forever. What's wrong? My Fix: www.littleactivity.com 1st Grade · Science
Coding — Safe & Kind — Part 1 SCIENCE · 1ST GRADE Name Date Learn the concept, study the code, then try the challenge! Coding Concepts Coding means writing instructions that a computer can follow step by step. Code Example: // Every program has: // 1. Input — data going in // 2. Process — what to do with it // 3. Output — the result Steps: 5. Debug and improve 2. Plan your solution (algorithm) 4. Test your code 1. Understand the problem 3. Write the code Try It! Write step-by-step instructions to make a peanut butter sandwich. Be specific! Debug Challenge: Your instructions say 'put peanut butter on bread' but the robot puts the jar on the bread! R… My Fix: www.littleactivity.com 1st Grade · Science
Coding — Variables — Part 1 SCIENCE · 1ST GRADE Name Date Fill in this page as you do your investigation. What are we finding out? What are variables and how do they store data? What we need: computer, code editor, practice exercises What I think will happen: Write your own: If I change ___, then ___ because ___ What I will change: Variable name and value assigned What I will watch: What the program outputs using the variable What to do: 1. Learn what a variable is 2. Create a variable and assign a value 3. Use the variable in your program 4. Change the value and observe 5. Try different data types What we saw: Variable Name Value Data Type score name Trial 3 What I learned: Variables are useful because... www.littleactivity.com 1st Grade · Science
Coding — If & Then — Part 1 SCIENCE · 2ND GRADE Name Date Learn the concept, study the code, then try the challenge! Coding Concepts Coding means writing instructions that a computer can follow step by step. Code Example: // Every program has: // 1. Input — data going in // 2. Process — what to do with it // 3. Output — the result Steps: 2. Plan your solution (algorithm) 5. Debug and improve 3. Write the code 1. Understand the problem 4. Test your code Try It! Write step-by-step instructions to make a peanut butter sandwich. Be specific! Debug Challenge: Your instructions say 'put peanut butter on bread' but the robot puts the jar on the bread! R… My Fix: www.littleactivity.com 2nd Grade · Science
Coding — Lists — Part 1 SCIENCE · 2ND GRADE Name Date Learn the concept, study the code, then try the challenge! Coding Concepts Coding means writing instructions that a computer can follow step by step. Code Example: // Every program has: // 1. Input — data going in // 2. Process — what to do with it // 3. Output — the result Steps: 4. Test your code 3. Write the code 5. Debug and improve 1. Understand the problem 2. Plan your solution (algorithm) Try It! Write step-by-step instructions to make a peanut butter sandwich. Be specific! Debug Challenge: Your instructions say 'put peanut butter on bread' but the robot puts the jar on the bread! R… My Fix: www.littleactivity.com 2nd Grade · Science
