CREATED BY:Farisa Himatin Nihayati (053184229)

SUBJECT

OBJECTIVES

EVALUATION

CLOSURE

Measurement is an activity to compare a quanity with another quantity that is assigned as unit. To measure the quantity of length, we can use a vernier caliper.Vernier caliper is an instrument to measure length which is more accurate than a ruler, since it has the smallest scale of 0,1 mm.

CONSIST OF A VERNIER CALIPER

HOW TO READ THE SCALE OF A VERNIER CALIPER?

The reading of the main scale that coincides with the zero vernier scale is between 3 mm and 4 mm.

The vernier scale that is joint vertically with the main scale is the seventh scale.

Thus, the reading of the vernier caliper is

(3mm + 0,7mm) = 3,7mm

CONSIST OF A MICROMETER SCREW GAUGE

HOW TO READ THE SCALE OF A MICROMETER SCREW GAUGE?

The reading of the main scale that coincides with the edge of the outer wrap is 7,5mm.

The outer wrap line which coincides exactly with the horizontal line of the main schale is 38-th line.

Thus, the reading of the micrometer screw gauge is

(7,5mm + 38 part) = 7,5mm + 0,38mm = 7,88mm.

WORKSHEET

Objectives : Doing measurement of length, outer diameter, and width by vernier caliper and micrometer screw gauge

Materials : - Cubes - Cylinders - Vernier caliper

- Micrometer screw gauge

Experiment methods :• Measure length, and width of cubes

by vernier caliper micrometer screw gauge

• Measure length and outer diameter of cylinder by vernier caliper and micrometer screw gauge

EVALUATION

What is measurement?What is an instrument to measure the length? Why a micrometer screw gauge more accurate than a vernier caliper?What is the reading of the vernier scale shown below!

EVALUATION

A ring is measured by a vernier caliper. What is the diameter of the ring as read in the scale?

EVALUATION

The following figure illustrates a micrometer screw gauge. What is reading shown?

EVALUATION

A student uses a micrometer screw gauge to measure the diameter of a cylinder. The following figure shows the reading of the micrometer screw gauge. What is the the reading shown?

 

CONCLUSION Measurement is an activity to compare

a quanity with another quantity that is assigned as unit. To measure the quantity of length, we can use a vernier caliper.

The vernier consists of a main scale engraved on a fixed jaw and an vernier scale engraved on a movable/sliding jaw

The steps of reading the scale of a vernier caliper are:

Read the main scale that coincides with the zero vernier scale

Read the vernier scale that is joint vertically with the main scale.

CONCLUSION

The micrometer screw gauge consists of thimble/outer wrap, sliding jaw, sleeve with main scale.

The steps of reading the scale of a vernier caliper are:

Read the main scale that coincides with the edge of the outer wrap

Read the outer wrap line which coincides exactly with the horizontal line of the main scale.