science A 1+2

Question 1

hydraulic system

Answer 1

uses fluids under pressure to move loads like a fire fighter ladder

Question 2

solubility

Answer 2

ability to dissolve; defined as how much of a solute will dissolve in a particular amount of a solvent.

Question 3

solvent

Answer 3

substance that dissolves a solute to form a solution

e.x. water/ liquids that can dissolve something

Question 4

solution

Answer 4

homogeneous (meaning same) mixture- mixture of two or one pure substance that looks like one substance

Question 5

solute

Answer 5

substance that dissolves in a solvent to form a solution e.x is the salt dissolving in water

Question 6

saturation point

Answer 6

point at which no more solute (ex salt)can be dissolved

Question 7

hydrometer

Answer 7

device used to measure the density of a liquid

Question 8

a fluid

Answer 8

any matter that has no fixed shape, can flow and takes the shape of container is a liquid or gas state

Question 9

homogeneous (mostly mixture)

Answer 9

a mixture that looks as if all the substances mixed is just one substance ( you cannot see the different mixtures mixed in)

Question 10

heterogeneous mixture

Answer 10

a mixture in which all the different substances can be seen when mixing

Question 11

colloid

Answer 11

cloudy mixture in which the droplets or tiny particles are too small to separate out

Question 12

unsaturated

Answer 12

solution in which more solute (ex. salt) can be dissolved at a given temperature

Question 13

concentration (maybe)

Answer 13

ability to dissolve the mass of a solute that can dissolve in a given amount of solvent to form a saturated solution at a given temperature

Question 14

pneumatic system

Answer 14

uses a gas under pressure to move loads (using compressed gases)

Question 15

how do particles move in a solid, liquid, and gas?

Answer 15

solids- movement is like wiggling in one place
liquids-particles are sliding around and over eachother
gas- moving as far as the space they can

Question 16

what factors affect the rate of dissolving

Answer 16

• temperature-increased heat, increase dissolving rate
• size of reactants- smaller pieces dissolve faster
• stirring- stirring increases chance of reaction

Question 17

what data does one need to calculate the solubility of a substance

Answer 17

the grams of a solute and the mL or L of a solvent

Question 18

what are the 4 points in the particle model of matter?(sami)

Answer 18

all matter is made up of tiny particles
particles are always moving
particles are attracted to eachother
particles have spaces between them