Recent Corrections

Question 1

electrical resistance

Answer 1

the prevention of the flow of electrons in a current

Question 2

why do alkali metals have to be stored in oil

Answer 2

they’re highly reactive with oxygen

Question 3

what are there in an electrical circuit

Answer 3

electron, neutral electron, proton, nucleus

Question 4

how can you test for hydrogen

Answer 4

squeaky pop test

Question 5

properties of group 1 metals

Answer 5

increase in reactivity as you go down
soft
boiling point decreases as you go down
noble gases

Question 6

properties of group 7 metals

Answer 6

decrease in reactivity as you go down
boiling point increases as you go down
halogens

Question 7

two features of a longitudinal wave

Answer 7

compression, rarefaction

Question 8

doubling forces

Answer 8

doubles extension

Question 9

sound waves are

Answer 9

vibrations

Question 10

diffusion

Answer 10

when particles move from an area of high concentration to an area of low concentration

Question 11

protein

Answer 11

used to build tissue for growth and repair