chemistry
where are all of the known elements located.
the periodic table.
what zone is able to do photosynthesis
sunlight zone
what is an example of a physical property?
the way something looks, feels, and how tall it is,
what is the basic building block of all things on earth.
atoms
what does photosynthesis create.
oxygen and glucose.
where are the most reactive elements found.
on the very left of the periodic table. (alkali metals)
what is the deepest zone
hadal zone
what are examples of chemical property?
flammability, toxicity, acidity, and reactivity.
true or false. a neutron is negatively charged.
false. an electron is negatively charged.
true or false. eons are the longest time classification
true.
where are the least reactive chemicals located
on the very right (noble gasses)
how many zones are there
5
is it a chemical or physical change when rust forms?
chemical
where is the proton (+) located in the atom?
in the nucleus
what is the power house of the cell
mitochondria
who created the periodic table
dmitri mendeleev
what is sea floor spreading?
when the ocean gets new land that comes from the mantle and pushes and breaks old land.
is it a chemical or physical change when water is boiling?
physical.
what is the only element with 1 proton.
hydrogen
what is a homologous structure
a structure that has similar characteristics and a common ancestor and a different function.
how many elements are on the periodic table
118
what are the organisms in the hadal zone
benthos
what is the difference between chemical and physical change?
physical changes the object but doesn't change its identity. chemical forms a new substance and can make a new smell.
how do you find the number of neutrons.
subtract the number of protons from the rounded atomic mass.
what are the reactants for photosynthesis?
6CO2+6H2O