Why are liquids and gases classified as fluids?
Because they have mass
Because they can flow
Because they have definite volume
Because they are compressible
What is the fourth state of matter?
Solid
Liquid
Gas
Plasma
What is diffusion?
Movement of particles from high to low concentration
Compression of gases
Movement of particles from low to high concentration
Mixing of two solids
What is compressibility?
Ability to change shape
Ability to flow
Ability to reduce volume under pressure
Ability to diffuse
Which of the following is NOT a common state of matter?
Wood
What happens when baking soda reacts with vinegar?
Temperature decrease
Gas evolution
Color change
Formation of precipitate
What is Brownian motion?
Regular movement of particles
Random movement of large suspended particles
Flow of liquids
Why do solids have definite shape?
Strong attractive forces between particles
Weak attractive forces
Large distances between particles
High compressibility
What happens to the volume of a gas when it is compressed?
Increases
Becomes zero
Remains constant
Decreases
Which factor does NOT affect evaporation rate?
Color of liquid
Temperature
Air currents
Surface area
What indicates a chemical reaction has occurred?
Change in temperature only
Change in shape
Formation of new substances
Change in size
What property do solids and liquids share?
Definite shape
Compressibility
Definite volume
Which of these is a physical change?
Rusting iron
Melting ice
Burning wood
Cooking food
Which is NOT an indicator of chemical reaction?
Change in mass
Gas formation
Precipitate formation
What is the definition of matter?
Anything that has volume
Anything that can be seen
Anything that has weight
Anything that has mass and occupies space
In which state does diffusion occur fastest?
Liquids
Gases
Solids
What is the boiling point of water at normal atmospheric pressure?
150°C
0°C
50°C
100°C
Which has the strongest attractive forces between particles?
What is the main difference between boiling and evaporation?
Boiling occurs throughout liquid at specific temperature
Boiling occurs at surface only
Evaporation produces bubbles
Evaporation occurs at boiling point only
Which of these is a chemical change?
Breaking glass
Cutting paper
Burning paper
Dissolving sugar