Ch.6.2 Flashcards
Matter can exist in three states: _________________ _________________, _________________. Matter in different _________________ have different _________________.
solid, liquid, gas, states, properties
Solids have _________________ _________________, a _________________ _________________ and _________________ _____________ ____________________.
fixed volume, fixed shape, cannot be compressed
Liquids have _________________ _________________, ____________ _________________ _________________ and _________________ _____________ ____________________. They take on the _________________ ________ _________ _________________ _________________ _____________.
fixed volume, fixed shape, cannot be compressed, shapes of the containers holding them
Gases have ___________ _________________ _________________ and __________ ________ ____________________. They have ____________ _________________ _________________ but take on the _________________ ____________ ______________ _________________.
no fixed volume, can be compressed, no fixed shape, shapes of their containers
To explain the _________________ of matter in its _________________ states, scientists have proposed a _________________ _________________.
properties, three, particle model
Scientists often use models to _________________ and _________________ ____________ _________________ ______________. These models illustrate _________________ ___________ _________________, _____________ _________________ as well as _________________.
study, explain how things work, structures of objects, real systems, concepts
When scientists are designing an aeroplane, they usually ______________ __________ _________________ of it and test it in a _________________ _________________. This helps scientists study ____________ _____________ _________________ _______________ _________________.
make a model, wind tunnel, how the aeroplane will work
We have used the _________________ _________________ model to explain Brownian motion of fat droplets in water.
kinetic motion
Models are used to show the _________________ of DNA.
structure
Scientists have proposed a _________________ _________________ based on the particle theory. It helps describe the _________________ and _________________ of the particles in _________________, _________________ and _________________.
particle model, arrangements, movements, solids, liquids, gases
Arrangement of solid particles:
Movements of solid particles:
compared to:
are close together and arranged regularly
cannot move from one position to another, but can only vibrate about fixed positions
audience sitting in a cinema
Arrangement of liquid particles:
Movement of liquid particles:
compared to:
are close together and arranged irregularly
can move around each other
people in a crowd
Arrangement of gas particles:
Movements of gas particles:
compared to:
are far apart
can move freely in all directions
people running in all directions with a lot of space between them
Scientists use the particle model to _______________________________________________________________________________________________________________________________________________________________.
describe the arrangements and movements of particles in the three states of matter
Why do solids have a fixed shape?
A solid has a fixed shape because its particles cannot move from one position to another.
