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** 8th Grade CAST Life Science Review** Flashcards | StudBud
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** 8th Grade CAST Life Science Review**
** 8th Grade CAST Life Science Review**
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Life Science Science Review #science #life #CAST #review #life science #NGSS #CAST
Flashcards
21 cards
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Practice quiz
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Questions
21
Answers
1
Oxpeckers sit on rhinos and eat parasites that live on rhino's skin. This is an example of...
mutualism
none of the above
competition
predation
2
Which of the following accurately describes the levels of organization of an organism?
organism->cell->organ system->organ-> atom->tissue->molecule
atom->molecule->cell->tissue->organ->organ system->organism
cell->atom->molecule->tissue->organ->organ system->organism
tissue->molecule->atom->organism-> cell->organ->organ system
3
What is happening at number 3 in the water cycle shown?
condensation
perspiration
precipitation
evaporation
4
The smallest unit of life is a...
molecule
cell
organism
electron
5
Examine the graph. What is causing the change in the population of female song sparrows?
competition with other bird species
habitat loss
changes in food
not enough information
6
Which produces more variation (differences) in offspring?
none of the above
asexual and sexual reproduction produce the same variation
sexual reproduction
asexual reproduction
7
What is the average yearly temperature and precipitation of a region?
climate
weather
biome
ecosystem
8
What process do cells use to change food and oxygen into carbon dioxide, water, energy?
cellular respiration
mitosis
eating
photosynthesis
9
An organelle that performs photosynthesis (energy from the sun to build sugar molecules)
cell membrane
mitochondria
nucleus
chloroplasts
10
What will happen to the mice population over time? (What would picture 3 show?)
stay the same
decrease in all mice
increase in white mice
increase is gray mice
11
Examine the graph. What is causing the change in the population of female song sparrows?
Between 1960 and 1970 carbon dioxide emissions were between 350 and 460
Annual carbon dioxide concentration are the lowest in September and October
Atmospheric carbon dioxide has increased significantly from 1960 to 2010.
changes in carbon dioxide levels are caused by changes in Earths Atmosphere
12
What are the 3 main parts of the nervous system?
brain, spinal cord, neurons
bones, joints, ligaments
kidneys, bladder, urethra
brain, heart, liver
13
Which layer of rock contains the oldest fossils?
cannot be determined
Layer C
Layer B
Layer A
14
The respiratory system works with the ______________ system to transport oxygen around the body
excretory
nervous
circulatory
digestive
15
One main difference between plant and animal cells is...
Plant cells have a nucleus
Animal cells have a cell membrane
Animal cells have chloroplasts
Plant cells have a cell wall
16
True or False: You have one copy of every gene.
False
True
17
Which of the following is an example of an ecosystem service?
pollination of crops by bees
regulation of atmospheric gases by algae
all of the above
purification of water by wetlands
18
DNA mutations can be...
harmful
or have no effect
beneficial (helpful)
all of the above
19
Where does most energy on Earth come from?
The Moon
The Sun
The Earth's core
Space
20
What is a producer in the food web?
swallowtail caterpillar
bolete fungus
persimmon tree
black bear
21
Similarities in embryonic development show that...
similarities between organisms
which organisms are closely related
organisms share a common ancestor
all of the above
