matter and atoms
what does atomic number mean
the number of protons
how do chemical reactions happen
when reactants collide with enough energy to break there existing bonds and form new ones
what is a ecosystem
a community of interacting organisms and their physical environment.
atmosphere spheres of the earth
troposphere, stratosphere, mesosphere, thermosphere, and exosphere.
renewable and nonrenewable
what is the atomic number in titanium
22
what is the most common chemical reaction
a synthesis reaction
what is the difference between biotic and abiotic factors in an ecosystem
biotic factors are living organisms and abiotic factors are non living
what is the geosphere
earths solid and molten rock, soil and sediments
What is the difference between renewable and non-renewable energy sources?
their ability to be replenished naturally.
what is the atomic number for iron
26
is the equation balanced H2 + O2 → H2O
NO
how does the concept of biomes relate to ecosystems
how does the concept of biomes relate to ecosystems
what is hydrosphere
earths water and ice
Give an example of a non-renewable energy source.
coal , oil, natural gas
what is the atomic number for gold
79
is this equations balanced 2Na(s) + O 2(g) → 2Na 2O(s)
YES
what is the most dominant land animals on the food chain
a lion
what is atmosphere
it is the layer of gases surrounding earth
Give an example of a renewable energy source.
solar power
what is the atomic number for tin
50
is this equations balanced C3H8 + 5O2 → 3CO2 + 4H2O.
YES
how many animal species are there
about 1.5 million have been discovered
what processes causes the water cycle
evaporation ,condensation ,precipitation and runoff
What are some environmental benefits of using renewable energy resources?
reducing pollution, mitigating climate change, and protecting ecosystems.