Show:
chemical reactions
periodic table
sound
light
thermal energy
100

give an example of an irreversible chemical reaction

(any of these will do but if there's another example that's valid, it will work too)

baking bread
baking a cake
cooking in general

100

what's the trend in group 1?

the reactivity increases as you go down the group.

100

how can we hear sound? describe the whole process

sound waves reach the ear, then vibrates the eardrum, which then goes to the cochlea which turns the sound waves and vibrations into electricity signals which are sent to the brain.

100

what happens to light when it enters a prism

it refracts into many colors

100

name the three ways that thermal energy is transferred

convection
conduction
radiation

200

give an example of reversible chemical reactions

state change, as in, an icecube turning into water, a chocolate bar melting, etc 

200

what's the trend in group 8?

as you go down the group, the boiling point increases or the atoms get larger

(if either is mentioned, the points should be awarded)

200
The higher the frequency, the higher the _____?

Pitch.

200

when a light ray comes into contact with a surface, it _____?

reflects

200
give an example of radiation
(any of these answers are good)

sun
radiator

300

how does sodium react with water?

explosions, heat, smoke, fumes, bubbling

300

what's group 7 called

halogens

300

The wider the wave length, the higher the ______?

frequency.

300

What happens to light when it enters another medium?

it 'bends' and refracts.

300
describe how convection works

thermal energy transfers through fluids

400

What happens to a noble gas when it is very cold?

It turns into liquid or solid

400

what's group 8 called

noble gases

400

can sound go through a solid? (yes/no)

yes

400

in what medium is light fastest?

a vacuum.

400

describe how conduction works

thermal energy in solids

500

what is the approximate melting point of Helium?

(any number within this range will do)

-273 to -260

500

name an element found in group 1

(if any one of these are named, points should be automatically awarded)

rubidium, francium, sodium, lithium, cesium

500

in what medium is sound fastest?

solids.

500

name all the colors in light

Red, Orange, Yellow, Green, Cyan, Blue, and Violet

500

describe thermal energy transfer

thermal energy transfer, measured in Joules, is transferred from one energy store to another