A balance is a basic instrument that serves to measure the mass of an object, using a standard weight to compare its mass and estimate the value of the mass of the unknown object. So we can use it to make home measurements or present it as a science project for elementary school students.
Materials Required
They can be made with a clothes hook suspended with a pendulum in the middle and two small baskets, they can also be made from height sticks and clips using the same pendulum technique, they can be made from wood, from recycled bottles among many other materials.
Materials to be used:
Procedure:
Step 1: Use a hole punch to make holes in 2 small paper cups. Punch 2 holes in each cup. Drill the holes near the rim of the cups and on opposite sides. If you don’t have paper cups, you can make the cubes for your scale from plastic cups
Step 2: Cut 2 pieces of string that are approximately 1 foot long. Any type of string will work, but a thick, strong string will make the scale more durable. After cutting the pieces of string, place them next to each other to make sure they are the same length. If they are not, cut them with scissors to adjust their lengths.
Step 3: Tie the ends of the wadding through the holes in the cups. Use 1 piece of string per cup. When you are done, the pieces of string should form thin handles on the cups, as cups are small cubes. Find a clothes hanger with notches. A plastic, metal, or wood hanger will work, as long as it has a notch on both sides of the hook. Otherwise, the paper cubes will slip and fall off the scale. If you don’t have a notched clothes hanger, you can use a little more string to tie the handles of the paper cubes to the bottom of a regular clothes hanger so that they don’t fall off.
Step 4: Hang the buckets on the clothes hook with the twine handles. Hang the cups on opposite sides of the clothes hangers in the notches. When you are finished, lift the scale and hold it at the top to examine the buckets. Both buckets should be hung at the same level; if one is higher than the other, you will need to adjust the string handles.
Step 5: Hang the scale on a door knob. Door knobs are excellent for hanging scales because they are low enough for children to reach. If you can’t find a door knob to use, look for any type of handle or bar you can hook the clothes hook on.
Step 6: Help your children find objects to put on the scale. Any kind of object will work, as long as it is small enough to fit in the paper cubes you made. Some fun objects you might try to weigh are your children’s favorite small toys, different rocks that your children find outside and small fruits like strawberries, blueberries and grapes.
Step 7: Have the children experiment by putting the different objects in the cups. When the object in 1 cup weighs more than the object in the other cup, the heavier cup will sink and tip the scale. Explain to your children that the bottom bucket has the heaviest object, and the top bucket has the lightest object.
For this we must have:
We start by taking two of the bottles and cutting them in half, then we make some holes in the top that go through to the other end
We put the string through the holes of the previously perforated bottles.
Then we take the bottle that is left over and we put it as a support on the lid, we must glue the circular wood, and on it we put the wooden palette at both ends we put what we had previously done with the plastic bottles and the rope, and we have a Scale.
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