L 10-1 phases of matter, L 10-2 density and specific gravity

Question 1

Matter

Answer 1

Anything that has mass and volume

Question 2

Compressibility

Answer 2

Measure of how much a given volume of matter decreases when placed under pressure.

Question 3

Matter in a solid

Answer 3

has a constant volume and a constant shape

Question 4

Solid has a fixed size and shape. Why?

Answer 4

☀︎ Particles are highly packed (i.e. no big spaces between particles)

☀︎Therefore force of attraction between particles is strong.

☀︎Usually it requires a large force to change the size and shape (it is
only compressed under certain conditions)

Question 5

Matter in liquid

Answer 5

Matter has a constant volume but not a constant shape
liquid flows to take the shape of the container
it has a certain volume

Question 6

Liquid

Answer 6

☀︎Liquid does not maintain a fixed shape( It takes the shape of its container and it can flow)

☀︎Like solid, it has a fixed volume that only can be changed by large force (not readily compressible)

☀︎Particles are less packed than solid (i.e. bigger spaces between particles)

☀︎Particles can move freely

☀︎Therefore force of attraction between particles is weaker than solid.

Question 7

Matter in gas

Answer 7

☀︎ Matter neither a constant volume nor a constant shape

☀︎ a gas disperse to fill every inch of a container
☀︎ a gas flows and takes the shape of the container

Question 8

Gas

Answer 8

☀︎Gas does not have a fixed shape nor fixed volume.

☀︎A gas fills its container, taking both the shape and the volume of the container.

☀︎ no force of attraction

☀︎Particles can move freely with high speed

Question 9

Fluids

Answer 9

Because liquid and gases do not maintain a fixed shape, they both have the ability to flow. They are thus referred to collectively as fluids.

Question 10

Density

Answer 10

☀︎Density is the measure of the “compactness” of a material

☀︎How close the atoms or molecules are to each other

☀︎All substances have density including liquids, solids, and gases

Question 11

Density rule:

Answer 11

Density = mass/volume

Question 12

Volume of cube=

Answer 12

s3

Question 13

volume of rectangular prism=

Answer 13

length x width x height

Question 14

Volume of sphere=

Answer 14

volume= 4/3 x 3.14 x r3

Question 15

when does plasma occur?

Answer 15

Plasma phase occurs only at very high temperature

Question 16

Liquid crystal

Answer 16

Liquid crystal used in TV, Cell phone can be considered a phase matter between solid and liquid.