MAD ABOUT SCIENCE 2º ESO

PRACTICE 1: MEASURING IN THE LAB 

You can download the guide clicking here.

1.  Objectives.

- To learn how to measure length, surface, volume, mass and density.

- To learn how to convert different units of measure.

2.  Equipment.

ü  Tape measure üClassic scale üElectronic scale   üGraduated cylinder üThree different matters (and one thread to tie).            

3.  Procedure.

Form 6 groups. Each group will have:

- One logistic manager (he or she brings and leaves the equipment).

- Two record managers (he or she takes note of the records).

- One safety manager (responsible of safety and apply the rules)

- Two closing managers (they will be in charge of keeping the lab tidy and clean).

a.    Draw a sketch of the classroom, in 2 dimensions and 3 dimensions.

b.    Measure the classroom and use the sketch to take note of the measures. Do not forget to measure the height of room (ask the teacher how to do it).

c.    Measure the mass of each of the three objects, using the classic scale. Take note of the results (if you weigh a liquid, subtract the mass of the container).

d.    Measure the mass of each of the three objects, using the electronic scale. Take note of the results.

e.    Measure the volume of the three objects, using the graduated cylinder. Tie the objects for not breaking the glass. Take note of the millilitres of each matter.

4.  Results:

LENGTH

-      What is the length of wall which has the windows?

-      What is the lenght of the wall which has the whiteboard?

Express those measures in meters, millimetres, and kilometres.

SURFACE (Remeber that the area of a rectangle is A=a·b)

-      What is the surface of the classroom?

Express this surface in square meters, square millimetres and square kilometres.

 

VOLUME (Remeber that the volume of a prisme is V=a·b·c)

-      What is the volume of the classroom?

Express this measure in cubic meters, litres and cubic millimetres.

MASS OF THE OBJECTS

-      What is the mass of objects 1, 2 and 3 using the classic scale?

-      What is the mass of the objects 1, 2 and 3 using the electronic scale?

Express this mass in grams, kilograms and tonnes.

-      Which measure is more accurate?

VOLUME OF THE OBJECTS

-      What is the volume of objects 1, 2 and 3?

Express this volume in millilitres, litres, cubic metres and cubic centimetres.

DENSITY OF THE OBJECTS

 Remember that 

-      With the mass and the volume, complete the following table:

Object	Mass (g)	Volume (cm3)	Density (g/cm3)
Object 1
Object 2
Object 3

Looking to the different substances table, which type of substance do you think we have?