P6 - Molecules And Matter Flashcards Preview

AQA GCSE Physics > P6 - Molecules And Matter > Flashcards

Flashcards in P6 - Molecules And Matter Deck (12)
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1

How do you measure the density of a object/liquid?

Measure mass and volume and use equation p=m/v

2

When do objects float?

When they have a lower density than water (less than 1000kg/m3)

3

Most energetic state of matter?

Gas.

4

Less energetic states of matter?

Solid.

5

Why does the mass of a substance stay the same when it’s state of matter changes?

Because the number of particles are the same.

6

The flat point of a temp-time graph gives what?

The melting/boiling point of a substance

7

Increasing the temperature of a substance increases....

It’s internal energy.

8

Latent heat?

The energy needed for a substance to change state without changing temp.

9

E. Latent heat?

E=mL

10

D. Specific latent heat of fusion/vaporisation?

Energy needed to melt/boil 1kg of a substance without changing its temp.

11

How can the specific latent heat of ice/water be measured?

By using a low-voltage heater to melt the ice/water

12

What caused pressure of a gas?

The random impacts of gas molecules on surfaces that are in contact with the gas.