Download 7th grade Science 1st Semester Exam Review

7th grade Science 1st Semester Exam Review
Know the definitions of the following words:
Species
a group of similar organisms that can mate and produce fertile
offspring in nature
Spontaneous Generation The mistaken idea that living things arise from nonliving sources
Response
stimulus.
An action or change in behavior that occurs as a result of a
Stimuli /stimulus A change in an organism’s surroundings that causes the
organism to react
Vaccine
a substance that stimulates the body to produce chemicals that
destroy viruses, bacteria, or other disease causing organisms
Virus a small non-living particle that invades and then reproduces
inside a living cell.
Pistil The female reproductive structures of a flower
Stamen The male reproductive structures of a flower
Monocot
An angiosperm that has only one seed leaf, flower parts are in
multiples of 3, leaf veins are parallel
Dicot An angiosperm that has two seed leaves, flower parts are in multiples of 4
or 5, leaf veins are branched
Xylem the vascular tissue though which water and nutrients move in some plants
Phloem the vascular tissue though which food moves in some plants
Germination The early growth stage of the embryo plant in a seed (to sprout)
Pollination the transfer of pollen from the male reproductive structures to the
female reproductive structures
Fertilization
The joining of a sperm cell and an egg cell
Fruit The ripened ovary and other structures that enclose one or more
seeds of an angiosperm
Irrigation Process of supplying water to an area of land to make it suitable for
growing crops
plankton tiny ocean organisms that float in the water,carried by waves, current
flood the volume of water increases so much that the river overflows its channel
benthos
organisms that inhabit the ocean floor
desalination removing salt from ocean water to make it fresh water
nekton free-swimming ocean animals ( they swim where they want to)
Respiration the process by which cells break down simple food molecules to
release the energy they contain
SONAR sound navigation and ranging, used to measure ocean floor depth
Autotroph
an organism that makes its own food ( a producer)
Heterotroph an organism that can not make its own food ( a consumer)
Photosynthesis the process by which plants and some other organisms capture
the energy in sunlight and use it to make food.
pH A range of number from 0-14 that tells how acidic or basic a substance is
pH scale 0-6 Acid, 7 neutral, 8-14 Base
Explain how viruses multiply in our body.
What are the advantage and disadvantage of Hydroelectric power.
List the 4 ways infectious diseases spread
What 3 things make deep ocean study difficult (do not use oxygen as an
answer).
Know the Levels of Classification
Know how to write a scientific name properly