measurement and properties of matter

Question 1

Tonne, Kilogram, Gram and Milligram are all units of mass.

which one is the s.i unit

Answer 1

KIlogram

Question 2

what is the SI unit of time
millisecond (ms)
microsecond (us)
nanosecond (ns)
second(s)

Answer 2

second (s)

Question 3

kilometre, metre, centimetre, millimetre, mircrometre, nanometre,
Which is the SI unit of lenght

Answer 3

metre

Question 4

how do you measure lenght

Answer 4

For a few millimetres a ruler or calliper can be used.
For several metres a tape can. be used
For small objects a micrometer or vernier calliper can be used.

Question 5

state how to measure time

Answer 5

time intervals of many seconds can be measured with a stop-clock or stopwatch,
you can also use a pendulum the would be set up to investigate the time taken for a single swing. with a rigid support and a sting tied to a small mass(bob). the bob will swing, every swing takes the same time (period).

Question 6

state how to measure volume of a liquid

Answer 6

to measure a liquid you use a measuring cylinder.

to measure a regular solid : rectangular block = length x width x height

Question 7

state how to measure volume of a regular and irregular solid

Answer 7

to measure a regular solid :
rectangular block = length x width x height
cylinder = pie x radius2 x height

to measure an irregular solid :
you can place a small solid in a measuring cylinder with a liquid and measure. then subtract the volume of the liquid from the total volume. you can do the same for a big solid just instead with a displacement can.

Question 8

how to measure density

Answer 8

density = mass/volume

Question 9

what is a solid

Answer 9

Solids keep their shape and cannot be compressed
In a solid, the particles are packed close to each other in fixed positions.
They are locked into place, and this explains why solids have a fixed shape.

Question 10

what are particles held together by

Answer 10

Particles are held together by forces of attraction

Question 11

what is a liquid state

Answer 11

In the liquid state, particles do not have fixed positions.
They move about freely, but they stay close together because the forces of attraction between them are quite strong, but not as strong as in solids.
They take the shape of the container

Question 12

what is a gaseous state

Answer 12

A gas will fill the entire space that is available to it. This is because the particles in a gas have no particular arrangement.Gases spread out quickly to fill all the space available to them.Gases do not have a fixed shape.