Mass and weight

Question 1

what is mass

Answer 1

mass is the amount of matter in an object

Question 2

what is weight

Answer 2

the pull of gravity on an object

Question 3

what is weight measured in

Answer 3

Newtons

Question 4

what is mass measured in

Answer 4

grams or kilograms

Question 5

what is the strength of the earths gravitational field

Answer 5

about 10N/kg

Question 6

what is density

Answer 6

density - is how much mass is contained in a particular volume

Question 7

what is the formular for density

Answer 7

density = mass/volume

Question 8

mass and volume formualr for desity

Answer 8

mass = density x volume

Volume = mass/volume

Question 9

what are the units of density

Answer 9

grams/cm cubed

kg/m cubed

Question 10

how to measure the volume of regular objects

Answer 10

by multiplying the length by the height by the width

Question 11

what is the density of water

Answer 11

1g/cm cubed

Question 12

how you know whether an object will float or sink

Answer 12

if a substance has a greater density than 1g/cm cubed they will sink in water

if a substance has a density less than 1g/cm cubed then it will float in water

Question 13

what is Archemedes principle

Answer 13

when an object is partially or totally immersed in a liquid it experiences an upthrust equal to the weight of the fluid displaced

Question 14

what is a plimsoll line and how/why is it used

Answer 14

• ## The plimsol line indicates the legal limit to which a ship can be loaded for specific water types and temperatures

Question 15

what is ice

Answer 15

ice is less dense that water, when it melts it turns into water and becomes more dense