science ch 2 & 3 Flashcards
The formula for density is
D = m/v
If an object floats that means its density is ____ liquid.
less
If an object sinks that means its density is ____ liquid.
denser
When the density of the liquid and object are the same, wherever you place the object…..
it will stay still/float
Matter is…
What things are made of & Anything that takes up space
Density’s unit is always..
cubed
Mixing pure substances form
Mixtures
Matter is classified as a pure substance
when all of the particles are identical
Matter is classified as a mixture
when there is different types of particles.
The difference between Pure substance and Mixture is that..
Pure substance = all particles identical
Mixture: different types of particles
Heterogenous is
when a substance is not even
Homogenous is
when a substance is even
Physical PROPERTIES is
matter you can observe with 5 senses
Chemical PROPERTIES is
how matter reacts and changes into something new
Physical CHANGE
change that only happens physically and is reversible & stays the same
Chemical CHANGE
change that changes the chemical formula and is forming with new substances
The states of matter are..
- Solid
- Liquid
- Gas
- Plasma
The particles for a solid are
tight and packed
The particles of a gas are
Very fast and breaking apart
The particles of a liquid are
moving faster than solid, more space between them
The particles for plasma are
electrons are separated from particles and move around
The kinetic-molecular theory is that the states of matter….
have tiny particles and are always in motion
Elements are pure substances that are made of only..
one type of atom. (mushroom)
Compounds are pure substances that are made of..
multiple types of atoms (a group of mushrooms and broccolis as one)
