Math Lab Activity
– Balance Scales
Use this link for the virtual lab:
Objective:
In this activity, students will use balance scales to visualize and solve linear equations to understand the concept of linear equations, solve basic linear equations using the balance scale model, and practice solving equations with variables on both sides.
Materials Needed:
- Balance scales (virtual)
- Various weights or objects to place on the scales
- Paper and pencils
Instructions:
Introduction to Balance Scales :
– How the balance scale works: whatever is placed on one side of the scale must be balanced by an equal weight on the other side for the scale to remain level.
– Use simple objects like coins or blocks to demonstrate how adding or removing weight affects the balance.
Single-Step Equations:
– Consider a simple linear equation like: 2x = 10. The goal is to find the value of x that balances the equation.
– Represent the equation on the balance scale. Place a weight of 2 units on one side and ask them to find the weight needed on the other side to balance the scale. This weight will represent the value of x.
Equations with Variables on Both Sides :
– Consider an equation like: 3x + 4 = 2x + 9. This equation has variables on both sides.
– Represent the equation on the balance scale again. Place 3 units on one side and 4 units on the other side. Find the weights needed on both sides to balance the scale.
– Isolate the variable by performing operations (subtracting 2x from both sides).
Practice:
– Print worksheets with various linear equations and solve them using the balance scale method.