particle theory and density (topic 3) Flashcards
1
Q
using a eureka can (5)
A
- measure the mass of the metal using a balance/scales
- fill a eureka can with water and allow excess water to drain out
- place a measuring cylinder under the spout of the eureka can
- slowly lower metal into the eureka can
- record the volume of water displaced by reading the measuring cylinder
- density = mass ÷ volume
2
Q
describe how the motion of particles in a gas changes as it is heated (2)
A
- gas particles gain kinetic energy
- causing the average particle speed to increase
3
Q
(3)
A
- measuring cylinder A
- smaller increments give greater precision
- there would be a large error associated with measuring cylinders B and C as the increments are very large
4
Q
describe two precautions the student should take to ensure they obtain accurate results (2)
A
- place measuring cylinder on level surface
- read measuring cylinder at eye level
- wait for all liquid to run down the sides of the measuring cylinder
5
Q
A
g/cm^2
6
Q
(3)
A
- the liquids have different densities
- the liquid with the highest density will be at the bottom
- the liquid with the lowest density will be at the top
7
Q
a student takes an ice cube out of the freezer and leaves it on the table, describe the change in movement of the particles as the ice cube melts (2)
A
- when in solid form, the particles vibrate about fixed positions
- particles in a liquid move (more) freely and are not in fixed positions
8
Q
describe how the motion of the particles in the water changes as the melted ice cube warms up to room temperature (2)
A
- particles gain kinetic energy as the temperature increases
- average speed of particles increases
9
Q
A
vernier callipers
10
Q
A
11
Q
A
12
Q
state the volume of liquid in the measuring cylinder
A
15cm^3
13
Q
d=m/v
mass = 15g
volume = 15cm^3
A
14
Q
describe how the student should use the equipment in the diagram to find the mass of the liquid (2)
A
