Gr 7 States of Matter
What are the three states of matter?
Solid, liquid, gas
A mixture where you can see different parts is called what?
Heterogeneous mixture
What is a fluid?
A substance that can flow
Density compares what two things?
Mass and volume
What is the universal solvent?
Water
Which state of matter has a fixed shape?
Solid
What is a homogeneous mixture also called?
A solution
Which two states of matter are fluids?
Liquids and gases
What force helps objects float?
Buoyant force
What separation method uses a magnet?
Magnetism
What is evaporation?
A liquid changing into a gas
In salt water, what is the solvent?
Water
What does viscosity measure?
Resistance to flow
If an object is less dense than water, what happens?
It floats
What type of system uses liquids: pneumatic or hydraulic?
Hydraulic
What happens to particles when heat is added?
They move faster
What does saturated mean?
No more solute can dissolve
Which has a higher viscosity: honey or water?
Honey
What does displacement mean?
Taking the place of another substance
What method separates salt from salt water?
Evaporation
What is sublimation?
A solid changing directly into a gas
Name two ways to increase dissolving speed.
Heating, stirring, crushing smaller
How does increasing temperature affect liquid viscosity?
It decreases viscosity
What is Archimedes’ Principle?
The buoyant force equals the weight of displaced fluid
What law says pressure spreads evenly through a fluid?
Pascal’s Law