Matter Flashcards
Complete the sentence
Almost everything is made of …
particles
What are the 3 states of matter?
- solid
- liquid
- gas
What are the 3 properties of a solid?
❌ can’t be compressed
✔️ does not flow
fixed shape
What are the 3 properties of a liquid?
❌ can’t be compressed
✔️ does flow
shape of the container (bottom)
What are the 3 properties of a gas?
✔️ can be compressed
✔️ does flow
shape of the whole of the container
What 3 things do the properties of substances depend on?
- what the particles are like
- how the particles are arranged
- how the particles move around
What is another way of saying “Can it be compressed?”
Can it be squashed?
Why can’t solids be compressed?
There is no air inside them and the particles are already touching.
Why can’t liquids be compressed?
The particles are very close together.
Why can gasses be compressed?
The particles aren’t touching and there is lots of room for air.
Why do solids have a fixed shape?
The particles are stuck together.
Why do liquids have a no-fixed shape?
The particles can move around.
Why do gasses have a no-fixed shape?
The partciles can move randomly.
Why can’t solids flow?
They have fixed positions and there are bonds between the particles.
Why can liquids flow?
They can move past each other and have no fixed shape.
Why can gasses flow?
They can move in random directions and have no fixed shape.
What is meant by the term “melting point”?
When a solid becomes a liquid
What is meant by the term “boiling point”?
When the temperature makes the liquid turn into gas
Describe what is meant by the term “evaporation”?
When the particles on the surface turn into a gas at any temperature.
During evaporation - how do particles leave the liquid?
Just the particles at the top have the energy to escape.
During boiling - how do particles leave the liquid?
Describe 2 situations where evaporation is useful
drying your washing
when we sweat
What is condensation?
Condensation is the change of state where** a gas turns into a liquid**. It can happen at any temperature below the boiling point of a substance.
What is melting?
The change of state from solid to liquid
What is freezing?
The change of state from liquid to solid.
What is condensing?
The change of state from a gas to a liquid.
What is boiling?
The change of state from a liquid to a gas.
What is evaporation?
The change of state from a liquid to a gas.
What is the temperature called at which a substance melts?
Melting point
What is the temperature called at which a substance boils?
boiling point
What is diffusion?
The movement of liquid or gas particles from a place of high concentration to a place of low concentration.
What is gas pressure?
The force exerted by gas particles on a surface.
Which state of matter is dense but cannot flow or be
compressed?
Solids
Which state of matter is dense and can flow but
cannot be compressed?
Liquids
Which state of matter is not dense but can flow and
be compressed?
Gases
Why can gases be compressed?
There are gaps between the
particles
Why can liquids and gases flow?
The particles are moving
Why are solids and liquids dense?
The particles are very close
together
Why can gases and liquids diffuse?
Due to the random movement
of particles
What are changes of state usually caused by?
Change in temperature
