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A #science Quiz to review for #SBA 7th grade Test.
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68 cards
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1
compounds are:
the smallest particle of an element
a substance containing 2 or more elements chemically joined
a mixture of elements and particles
a mixture of particles
2
consumers get their energy from:
eating other organisms
decomposing rotting material
the sun
exercising
3
A population's growth is limited by all of the following except:
temperature
energy
nutrients
space
4
To which class of levers does the human forearm belong?
Third Class
Fourth Class
Fifth Class
First Class
5
An experimental variable:
is the same as the control variable(s)
is the variable you keep the same in an experiment
is the variable you change on purpose in an experiment
is the variable that's affected by changing another variable
6
The fossil record provides:
information about every species that ever existed on Earth.
a remnant of an organism from the past.
a historical sequence of life on Earth.
DNA base sequences.
7
elements are:
the same as molecules
the simplest form of matter
the same thing as cells
two or more elements joined together
8
the the purpose of photosynthesis is:
converting the sun's energy into chemical energy
converting oxygen to carbon dioxide
helping a plant turn green
allowing humans to have necessary water
9
a cell is:
the smallest unit of a living thing
smaller than a molecule but bigger than a tissue
bigger than an organ but smaller than an organism
the largest unit of a living thing
10
Evolution is:
the study of rocks and fossils
a way of organizing the different species on Earth.
a place where an organism lives
a theory about the process of how organisms change over time
11
Mass Extinctions are:
an evolutionary relationship
periods of rapidly changing climate
periods of large-scale extinction
a single species becoming extinct
12
towards the end of "interphase":
the cell membrane pinches off to form 2 daughter cells
the DNA doubles
the cell grows and develops
the nucleus splits into 2 new nuclei
13
Gregor Mendel is known as
the father of genetics
the father of biology
the most famous scientist ever
an alien from Mars
14
The compounds in living things are:
carbohydrates, lipids, sugars, starches
carbohydrates, lipids, fats, proteins
carbohydrates, lipids, proteins, nucleic acids
glucose, carbohydrates, cells, tissues
15
The first source of energy in ecosystems is:
clouds
soil
sun
rain
16
All of the following are lines of evidence for evolutionary relationships
except:
the fossil record.
DNA analysis.
the same color of fur.
homologous structures/comparative anatomy.
17
homeostasis is:
the feedback control systems of the body
maintaining a life-supporting internal environment
cellular reproduction
the process of cellular respiration
18
during mitosis:
body cells divide once and produce a new organism
body cells divide once to replace old and damaged cells
body cells divide twice and produce a new organism
body cells divide 3 times in a row to replace old cells
19
the correct order of the phases of the cell cycle is:
interphase, cytokinesis, mitosis
interphase, mitosis, cytokinesis
cytokinesis, mitosis, interphase
cytokinesis, interphase, mitosis
20
an embryo is:
a specialized cell
a sex cell
a body cell
an organism in the earliest stages of development
21
Random mutations in genes:
cause only favorable traits
are adapatations
cause only unfavorable traits
produce a variety of traits in a population
22
atoms are:
groups of atoms chemically joined together
combinations of different molecules
the simplest form of matter
the smallest particle of an element
23
homologous pairs
are separated after fertilization
always stay together
are separated during mitosis
are separated during meiosis
24
You can predict the possible genotypes and phenotypes of offspring if:
you know which form is dominant and which is recessive
you know only the phenotypes of the parents
you know the genotypes of the parents
you create a punnett square
25
the kingdoms of living things are:
Animalia, Plantae, Bacteria, Felis, Domesticus
Animalia, Plantae, Bacteria, Fungi, Protista
Animalia, Class, Family, Order , Genus
Animalia, Plantae, Species, Family, Order
26
genetic disorders are:
a change in the hereditary material of an organism
the process of DNA replication
abnormal conditions that an organism inherits from parents
the structure of DNA
27
The steps in species formation are:
species formation, adaptation, isolation.
adaptation, species formation, isolation.
isolation, species formation, adaptation.
isolation, adaptation, species formation.
28
Producers get their energy from:
other organisms
the sun
exercise
nutrients
29
in
complete dominance:
neither trait shows up
one trait is always dominant over the other
both traits show up at the same time
the traits blend together to produce a new trait
30
An adaptation is:
an inherited trait that helps an organism survive.
a theory about how organisms change over time.
the way an animal behaves.
a newly discovered species.
31
The proper order of the steps in the scientific method is:
Question, Observation, Hypothesis, Experiment, Conclusion
Question, Experiment, Observation, Hypothesis, Conclusion,
Experiment, Conclusion, Hypothesis, Observation, Question
Observation, Question, Hypothesis, Experiment, Conclusion
32
people who have the genetic disorder "sickle cell anemia"
have abnormally shaped red blood cells
have abnormally shaped platelets
have abnormally shaped white blood cells
have no red blood cells
33
the carbon-oxygen cycle explains:
the process of photosynthesis
how carbon and oxygen are cycled through ecosystems
the way carbon and oxygen atoms behave
the movement of oxygen and carbon atoms
34
the correct order of levels of organization in living things is:
tissue, organ, cell, organ system, organism
organism, organ, organ system, tissue, cell
cell, tissue, organ system, organism, organ
cell, tissue, organ, organ system, organism
35
most of the energy in an ecosystem is lost as ______ as it moves from level to level (trophic)
decomposing material
evaporation
unusable heat
waste
36
alleles are:
different forms of a gene
the order of bases in a segment of DNA
possible combinations of genes from parents
strands of DNA
37
each rung of a DNA ladder consists of:
base pairs with A pairing G & C pairing A
base pairs with A pairing T & C pairing G
base pairs in random combinations of A, C, T, and G
a twisted ladder of sugar and phosphate molecules
38
The smallest unit of ecological organization is
community
population
organism
ecosystem
39
Organisms of the same species:
are genetically similar and can produce offspring together
are genetically similar but can't produce offspring together
are not genetically similar/can't produce offspring together
are not genetically similar & can produce offspring together
40
The order of steps in the water cycle is:
precipitation, rainfall, condensation
evaporation, cloud formation, condensation
evaporation, condensation, precipitation
precipitation, condensation, evaporation
41
The oldest fossils are found:
in the sand on the beach.
in the middle layers of rock.
in the upper-most layers of rock.
in the deepest layers of rock.
42
polygenic traits are traits that:
are determined by more than one gene
are determined by only one gene
result in genetic disorders
cannot be predicted with a punnett square
43
A place where an organism lives that provides the things it needs is called:
its habitat
an ecosystem
emigration
population density
44
When organisms with favorable adaptations survive and reproduce at a higher rate than others:
natural selection occurs.
over-reproduction occurs.
those organisms move to another area.
those organisms become extinct.
45
A punnett square:
shows all the possible combinations of alleles from parents
shows the phenotypes of offspring
predicts the genotypes of parents
predicts the gender of offspring
46
A population is:
all of the Earth's biomes
all of the cats, dogs, and humans in an area
the area in which an organism lives that provides its needs
all of the members of the same species living in an area
47
all
living things do all of the following
except
photosynthesize
use energy
grow, develop, and respond
reproduce
48
cell division is necessary for:
growth only
reproduction and growth
reproduction only
reproduction, growth, and maintenance of body functions
49
the variety of alleles in a population is called:
genetic abnormality
the study of genetics
genetic testing
genetic variation
50
an organism's traits are determined by:
both the environment and heredity
only the environment
only heredity
neither the environment nor heredity
51
DNA is:
a common ancestor.
the same thing as a gene.
the hereditary material of living organisms.
a homologous structure.
52
during osmosis, water molecules move:
from areas of high concentration to low concentration
from the outside of a cell to the inside of a cell
from areas of low concentration to high concentration
from the inside of a cell to the outside of a cell
53
living organisms contain mostly the elements
sulfur, oxygen, lead
hydrogen, helium, oxygen
carbon, hydrogen, oxygen
oxygen, glucose, hydrogen
54
the cell cycle is:
the period of time from one cell division to the next
the time a cell spends in mitosis
the time a cell spends in cytokinesis
the time a cell spends in interphase
55
Competition between 2 species happens when:
two or more species depend on the same limited source.
two species live closely together and at least one benefits.
an animal hibernates during the winter.
one animal hunts another for food.
56
the difference between active transport and passive transport is:
active transport does not require energy but passive does
both require energy
neither require energy
passive transport does not require energy but active does
57
osmosis is:
the same as active transport
movement of water molecules across a semi-permeable membrane
movement of water molecules around the outside of a cell
movement of any molecule across the cell membrane
58
a gene is:
a unit that determines traits
a recessive allele
the same thing as an allele
a dominant allele
59
biotic factors are:
the living parts of an ecosystem
the non-living parts of an ecosystem
interactions between species
how an organism survives
60
during meiosis:
sex cells divide twice and produce 4 diploid cells
sex cells divide once and produce 4 haploid cells
sex cells divide twice and produce 4 haploid cells
sex cells divide once and produce 2 diploid cells
61
energy pyramids show:
who eats whom in an ecosystem
how each member of an ecosystem gets its food
how energy moves from one organism to another in ecosystems
the difference between producers and consumers
62
Extinction happens when:
all members of a species die off completely.
a species moves to a new habitat.
there are very few members of a species left.
a species is thriving.
63
An organism's scientific name comes from:
its family
its genus and species
its taxonomy
its order and class
64
Populations grow in size when:
the emigration and immigration rates are the same.
number of births is equal to number of deaths.
number of deaths is greater than number of births.
number of births is greater than number of deaths.
65
probability is:
the mathematical formula for calculating percent
never used in science
never used in mathematics
the mathematical chance that an event will occur
66
photosynthesis and cellular respiration are related because
photosynthesis makes cellular respiration happen
animals and plants can both photosynthesize
products of photosynthesis are reactants in cellular resp.
they are the same thing
67
Food webs are:
the same as energy pyramids
overlapping ecosystems
overlapping food chains
the same as a food chain
68
decomposers are important because:
they return nutrients to the soil to be recycled
they produce energy for consumers
they balance food webs
they keep carbon and oxygen cycling in the atmosphere
