Physical Science

Question 1

what are the three changes in matter ?

Answer 1

boiling, condensation, evaporation

Question 2

what are the two different types of mixtures?

Answer 2

homogeneous and heterogeneous

Question 3

what does homogeneous mixture mean?

Answer 3

you can not see the different parts of the mixture. ex, coffee, creamer

Question 4

what does heterogeneous mixture mean?

Answer 4

you can see the different parts of the mixture. ex, chicken noodle soup

Question 5

values less than 7 on a ph scale are…

Answer 5

acidic

Question 6

values greater than 7 on a ph scale are…

Answer 6

alkaline (base)

Question 7

what is the smallest part of an element?

Answer 7

atom

Question 8

what are electrons?

Answer 8

negatively charged particles

Question 9

what are nuetrons? where are they located?

Answer 9

neutrally charged particles that are located in the atoms nucleus

Question 10

what are protons? where are they located

Answer 10

positively charged particles that are located in the atoms nucleus.

Question 11

what is an atomic number?

Answer 11

how an element is identified. it’s the number of protons in the nuclei

Question 12

do groups on a periodic table go vertically or horizontal?

Answer 12

vertical

Question 13

what is the smallest particle in a chemical element or compound?

Answer 13

molecule

Question 14

what are ions?

Answer 14

charged elements or molecules that have lost or gained one or more electrons

Question 15

what is an isotope?

Answer 15

two or more forms of the same element that have the same number of protons but different neutrons

Question 16

what is density?

Answer 16

the amount of matter an object has to its volume

Question 17

what is kinetic energy?

Answer 17

object is in motion

Question 18

what are the different types of energy?

Answer 18

mechanical, electrical, chemical and thermal

Question 19

what does mechanical energy do?

Answer 19

objects in motion

Question 20

what does electrical energy do?

Answer 20

moves through wires

Question 21

what does chemical energy do?

Answer 21

reaarangment of moecular structure

Question 22

what does thermal energy do?

Answer 22

moving particles by heat

Question 23

what is heat transfer?

Answer 23

the exchange of thermal energy between physical systems

Question 24

what are the three different types of heat transfer?

Answer 24

convection, conduction, and radiation

Question 25

what is convection? think of convection oven

Answer 25

transfer of heat by the movement of warmed matter

Question 26

what is conduction?

Answer 26

transfer of hear from particle to particle

Question 27

what is radiation heat?

Answer 27

transfer of hear from elctromagnetic waves

Question 28

how many different types of circuits are there?

Answer 28

2

Question 29

what is a series circuit?

Answer 29

components are arranged end to end

Question 30

what is a parallel circuit?

Answer 30

a circuit with branches that allows multiple applications to happen at one time

Question 31

what are good conductors for electricity ?

Answer 31

wire, metal, water

Question 32

cloud-to-ground lightning occurs between what?

Answer 32

opposite charges between thunderstorm cloud or between cloud and ground

Question 33

what does dependent variable mean?

Answer 33

what is being measured

Question 34

what does independent variable mean?

Answer 34

what is being tested, what is being manipulated