The Particle Model of Matter RQP- determining densities of regular and irregular solid objects and liquids

Question 1

irregular solids

draw the apparatus

Answer 1

• displacement can with fater flowing out into a measuring cylinder
• object drawn in the can

Question 2

regular solids- cube

step 1

Answer 2

use a ruler to measure length, width and height of a steel cube and calculate the volume of the cube using l x w x h

Question 3

regular solids- cube

step 2

Answer 3

place steel cube on the top pan balance and measure it’s mass

Question 4

regular solids- cube

step 3

Answer 4

use the measurements to calculate density using p= m/ V

Question 5

regular solids- sphere

step 1

Answer 5

use vernier callipers to measure the diameter of the sphere and calculate the volume using 4/3π(d/2)³

Question 6

regular solids- sphere

step 2

Answer 6

place sphere on the top pan balance and measure it’s mass

Question 7

regular solids- sphere

step 3

Answer 7

use the measurements to calculate density using p= m/ V

Question 8

irregular solids

step 1

Answer 8

place object on the top pan balance and measure its mass

Question 9

irregular solids

step 2

Answer 9

fill the displacement can until the water is level with the bottom of the pipe

Question 10

irregular solids

step 3

Answer 10

place a measuring cylinder under the pipe ready to collect the displaced water

Question 11

irregular solids

step 4

Answer 11

carefully drop the stone into the can and wait until no more water runs into the cylinder

Question 12

irregular solids

step 5

Answer 12

measure the volume of the displaced water

Question 13

irregular solids

step 6

Answer 13

use the measurements to calculate the density of the stone using p= m/ V

Question 14

liquids

step 1

Answer 14

place the measuring cylinder on the top pan balance and measure its mass

Question 15

liquids

step 2

Answer 15

pour 50 cm3 of water into the measuring cylinder and measure its new mass

Question 16

liquids

step 3

Answer 16

subtract the mass in step 1 from the mass in step 2- this is the mass of 50 cm3 of water

Question 17

liquids

step 4

Answer 17

use the measurements to calculate the density of the water using p= m/ V