biology
optics
chemistry
100

system the stomach belongs to

what is digestive system

100

this light is used for heat seeking

what is infrared

100

when one element in a compound is displaced by a more reactive element 

what is displacement reactions

200

control centre of the cell

what is nucleus

200

this light is at very high temperature 

what is incandescent

200

first element on periodic table

what is hydrogen

300

tissue the skin is made of

what is epithelial tissue

300
how do fireflys glow

what is bioluminescense

300

what combination makes a molecular compund

what is 2 non metals

400

first phase of mitosis

what is interphase

400

a part of a point source shadow

what is umbra

400

is fruit salad homogenous or heterogenous

what is heterogenous

500

name of cancerous tumour

what is malignant

500

one of the primary coulers

what is green,red and blue

500

rusting of iron physical or chemical change 

what is chemical change