earth
what is the earth full of?
a variety of rocks and minerals
what do you use to put out a fire?
a fire exstinguisher
there is a point to where water gets really cold and freezes what is that called?
freezing point
air was considered what element?
a pure element
what are the two most common elements on earths crust?
oxygen and silicon
is fire linked with air?
yes
whats the chemical formula for water?
H2O
what do plants need to have in order to perform photosynthesis?
carbon dioxide
what is the most abundant mineral in earths crust?
silica
what 3 things does fire need to exist?
oxygen, fuel, and heat.
since opposites attract, water molecules tend to ____ together
stick
what are the two primary elements in air?
nitrogen and oxygen
the third planet from the sun?
earth
what does fire create?
light, heat, and smoke
what is water known as?
universal solvent
what do plants give off during photosynthesis?
oxygen
where are metal ores found in earth?
the crust
why is smoke dangerous?
smoke has gases that can poison a person
water is made up of two hydrogen atoms and is bonded to one _______ atom.
oxygen
does air take up space?
yes