Triple_Beam_Balance_Grade7_Activity.pptx

Triple_Beam_Balance_Grade7_Activity

1. Using a Triple Beam Balance: Measuring Mass Accurately Grade 7 Science 📸 Reminder: Take photos during your activity and send them to Ma’am Mae Ann Montemayor’s Work FB Account

2. What is a Triple Beam Balance? - A tool to measure mass in grams - Has three beams (100 g, 10 g, 1 g) - Use it: zero → place object → move riders → read total mass

3. Parts of the Triple Beam Balance - Pan: where object is placed - Beams: 100g, 10g, 1g with sliding riders - Pointer: must align to zero mark - Zero adjustment knob: balances the scale

4. How to Use It – Step by Step 1. Zero the balance 2. Place the object on the pan 3. Move riders: 100g → 10g → 1g 4. Adjust until pointer is at zero 5. Add all beam values to get mass

5. Reading the Mass - Example: 100g beam = 200g 10g beam = 30g 1g beam = 4.7g ➜ Total = 234.7g

6. Your Task Overview - Measure mass of water (hidden volume) - Subtract container’s mass to get water mass - Compute percent error after activity - Take and send group photos for documentation

7. Percent Error Formula Percent Error = |Measured - Expected| ÷ Expected × 100% (Expected value given after activity) Reflection: Was your measurement close? Why or why not?

8. Reminders Before You Begin - Always zero the balance first - Move riders gently and carefully - Use a flat, steady surface - Work as a team - Document with photos and send to Ma’am Mae Ann