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Midterm review A
Review of chapters 1-5
Question | Answer |
---|---|
The number of individuals of a single species per unit area | population density |
scientific study of human populations | demography |
average year after year conditions | climate |
trapping heat energy and maintaining temperature | greenhouse effect |
individual,population,community,ecosystem,biome,biosphere | how organisms range in complexity |
individual related to others like it | species |
one who eats producers | consumers |
process to use the sun to provide nourishment for plants | photosynthesis |
the main source for all life | the sun |
an acidic soluiton | pH below 7 |
Four groups of organic compounds | carbohydrates, lipids, proteins and nucleic acids |
living things use this for their main source of energy | carbohydrates |
These organic compounds control the rate of reactions, build tissue and transport materials to help fight disease | proteins |
Chemical reactions always involve this in reactants | breaking of bonds |
chemical reactants always involve this in products | forming new bondscells use these to speed u |
cells use these to speed up chemical reactions | enzymes |
the goal of science | to observe and study nature |
the theory that life arises from non-living | spontaneous generation |
the smallest unit of life | cell |
the study of life | biology |
reproduction involving only one parent | asexual reproduction |
a much tested hypothesis | theory |
an idea to be tested | hypothesis |
How many variables should be changed at one time when testing a hypothesis? | one |
Living things share characteristics such as | growth and development and maiintaining an internal stability |