science summer exam

Question 1

whats a particle

Answer 1

tiny peices all matter are made from

Question 2

whats an atom

Answer 2

smallest fundamental independant particle

Question 3

size of atom

Answer 3

1 x 10 *-10m

Question 4

daltons model

Answer 4

-cannot be broken
-cannot be created or destroyed
-atoms of an elemant are identical

Question 5

whats the smallest particle

Answer 5

subatomic particle

Question 6

location of nucleas

Answer 6

central part of an atom

Question 7

location of electron

Answer 7

outer shell orbiting nucleas

Question 8

location of proton

Answer 8

in nucleas

Question 9

how to find atomic number

Answer 9

bottom number

Question 10

how to find atomic mass

Answer 10

top number

Question 11

how to find number of protons and electrons

Answer 11

bottom number

Question 12

how to find total number of protons and neutrons

Answer 12

top number

Question 13

why are there equal number of electrons and protons

Answer 13

as each negetivelly charged electron is attracted to a positivelly charged proton

Question 14

alpha particle-

Answer 14

small positively charged particle made from to protons and two neutrons

Question 15

term “ scattering” mean ?

Answer 15

when particles change direction or bounce back

Question 16

isotopes

Answer 16

atoms with the same number protons but different number neutrons

Question 17

chemical properties

Answer 17

reacts with acid and formula of oxides

Question 18

physical properties

Answer 18

includes melting points and density

Question 19

what are groups

Answer 19

columns

Question 20

what are periods

Answer 20

rows

Question 21

what is electric configuration

Answer 21

number of electrons in each shell

Question 22

order of electrons in each shell allowed

Answer 22

2.8.8

Question 23

what was rutherfords experiment

Answer 23

fired alpha particles at leaf and used phosphor green screen to see it and most particles scattered and didnt hit nucleas therefore it is small

Question 24

what information about elemants did mendeleev use to group them

Answer 24

relative atomic mass and properties

Question 25

definition of communicable and examples

Answer 25

diseases that are transferred-measles,malaria and food poisoning

Question 26

definition of non-communicable

Answer 26

diseases that aren't transferred-heart disease,cancer or diabetes

Question 27

factors that effect physical and mental health

Answer 27

lifestyle,diet,situations,stress

Question 28

whats a disease

Answer 28

something makes you ill

Question 29

whats a pathogen

Answer 29

a microbe that causes a disease

Question 30

structure of virus

Answer 30

outer protein coat protects inner genetic material

Question 31

what are 5 types of diseases

Answer 31

Lifestyle-smoking(how we live affects n increases risks of diseases) autoimmune-type 1 diabetes(body's immune system attacks and damages cells in body genetic-haemophilia (Fault in DNA that changes how cells work) defeciency -aenemia (lack of nutrient needed or good health) infectious-polio(caused by microbe and changes how cells work)

Question 32

what are hormones-

Answer 32

chemical substance or messanger that is released from gland into bloodstream

Question 33

how does virus infect cell

Answer 33

1-ttakes over genetic material 2-makes cell produce more viruses 3-breakks cell membrane 4-escapes and infects other cells

Question 34

placebo-

Answer 34

a fake medicine used t test to see if there's improvement but has no drug

Question 36

medicine

Answer 36

a drug that helps body cure diseases and infections and ease symptons

Question 37

antibiotic

Answer 37

treats bacterical infections by killing pathogens

Question 38

drug

Answer 38

chemicals that affect the way your brain and body work