1
it is used to measure the volume of liquids
measuring cylinder
it is used to measure the length of a book
ruler
it is used to measure the mass of an object
balance scale
it is used to measure the volume of irregular solids
measuring cylinder
it is used to measure the weight of an object
forcemeter
the unit of measuring density
g/cm3 or kg/m3
the unit of weight
newton
the unit of mass for vegetables
kg
the unit of measuring volume of liquids
litre or ml
the unit of measuring the length of the corridor
metre
the variable I change ..........
the independant variable
the variable I measure ...........
dependent variable
the variables I keep them constant
controlled variables
using the same amount of water in an experiment, what is the purpose?
to make a fair test
why we should to repeat the experiment?
to get reliable results
if the mass of a pen is 3g and has a volume of 2.5 cm3
what is the density? will it float or sink?
1.2 g/cm3 ... sink
if an object has a density of .54 g/cm3 and its mass is 10g what is its volume? will it sink or float?
float, 18.5 cm3
what is the mass of a wooden box if u know that its volume is 5 cm3 and density is 0.2 g/cm3, float or sink?
float, 1 g
what is the density of a sheet of aluminum, its mass is 2 g and its volume is 10 cm3? float or sink
0.2 g/cm3, float
what is the weight of a book that has a mass = 0.5 kg
(knowing that earth's gravity = 10 m/s2)
5 N
a tool used supply heat in the lab
Bunsen burner
a tool is used to see ting objects clearly
microscope
Used to hold, mix or heat small quantities of liquids or solids.
test tube
Used for separating solids from liquids via filtering (using filter paper).
filter funnel
separating funnel