1
everything in the world is made up of tiny building blocks called
molecules
what substance can change forms
water
are microbes always harmful
no
double down
what charge do electrons have
negative
atoms combine to make
molecules
what molecules are stars made of
gas
what are made of million of tiny water droplets
double down
clouds
can atoms be seen with a naked eye
no
double down
what charged do protons have
positive
what does the word atomos mean
uncuttable
what were the 92 elements called when they were created
the periodic table
matter is made up of tiny particles called
atoms
what two elements make up water
oxygen and water
what are substances that are a mix of elements
compounds
what is the method called for discovering new ideas in science
the scientific method
when water vapor cools down, it does what
condenses
when water gets hot enough, it does what
evaporates
when water droplets freeze, they become what
ice crystals
what zooms around an atoms nucleus
electrons
double down
what is the forever cycle of evaporation, condensation, and rain
the water cycle
double down
who was the philosopher who first discovered atoms
democritus
whats in the center of every atom
nucleus
how many atoms do each have:
9C ^4 Ca ^2 O^3
C: 36
Ca: 18
O: 27
how many elements are there now
118
what are the four types of microbes
amoebas, paramecium, fungus, and bacteria