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7th Grade Life Science Review
7th Grade Life Science Review
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Review for 7th grade science
Flashcards
72 cards
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Questions
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1
All of the grey squirrels that live in your neighborhood area are an example of a(n)...
ecosystem.
community.
population.
biome.
2
What do scientists need to know about a new element to place it on the periodic table?
How easy it is to locate the element
Where the element is found on Earth
The physical properites of the element
Who discovered the element
3
A group of similar organisms along with other groups of organisms in a certain area make up a..
population
ecosystem
species
community
4
Which of the following relationships would represent grass and a prairie dog?
parasite/host
producer/consumer
predator/prey
producer/decomposer
5
The correct order of who would have the most mitosis taking place to who would have the least?
Baby, 12-year-old with injury, 12-year-old, 30-year-old
30-year-old, 12-year-old with injury, 12-year-old, baby
12-year-old, baby, 12-year-old with injury, 30-year-old
Baby, 12-year-old, 12-year-old with injury, 30-year-old
6
An example of an animal produced through the process of selective breeding is the...
German Shepherd
Fox
Coyote
Wolf
7
What is the role of a producer in a food web?
It changes chemical energy (sugar) into solar energy (sun).
It gets energy by eating living matter.
It changes solar energy (sun) to chemical energy (sugar).
It gets energy by breaking down once living matter.
8
An increase in salmon and trout fishing by humans in recent years has most likely resulted in..
Greater plant productivity
An increase in the life expectancy of ducks
A reduced food supply for eagles
Reduced tourism on the Great Lakes
9
Which of the following statements is true about chemical reactions?
They change the characteristics of the substances.
They can make a new substance.
They combine two or more pure substances.
All of the above.
10
What is the role of a consumer in a food web?
It changes solar energy (sun) into chemical energy (sugar).
It gets energy by breaking down once living matter.
It gets energy by eating other organisms.
It changes chemical energy (sugar) into solar energy (sun).
11
Scientists believe that over 99% of all species are no longer living. This points to...
extinctions only happened in the past.
None of the above.
there has been one mass extinction event in all of history.
extinction is a common event.
12
How do polar bears' fat cells help them survive hibernation during the long cold winter months?
They provide energy and remove waste.
They provide warmth and energy.
They provide warmth and allow movement.
They provide food and allow movement.
13
Which of the following is true about sexual reproduction?
A sex cell from one parent forms the new offspring.
The sex cell from the mother provides 75% of genes.
A sex cell from each parent combines to form a new offspring
The sex cell from the mother provides 25% of genes.
14
Which of the following statements is true?
The basic building block of an element is a compound.
The basic building block of an element is a molecule.
The basic building block of an element is an atom.
The basic building block of a compound is an atom.
15
You are nervous. Your heart beat increases and you start to sweat. Two systems are involved.
The skin and respiratory system
The skin and circulatory system
The circulatory and digestive system
The circulatory and respiratory system
16
Which of the following statements is true about elements?
They are made of molecules of more than one type of atom.
They are made of cells.
They are made of more than one type of atom.
They are made of one type of atom.
17
A lichen is an example of a symbiotic relationship. That means that...
The fungus benefits and algae does not.
The algae benefits and the fungus does not.
Neither organism benefits.
Both organisms benefit.
18
The process of converting solar energy (sun) to chemical energy is called...
photosynthesis
cellular respiration
osmosis
fermentation
19
One parent organism produces an offspring. This is an example of...
asexual reproduction.
both asexual and sexual reproduction.
sexual reproduction
20
Which of the following is true of genes?
Genes are sections of DNA.
Genes are found in cells.
Genes are found on chromosomes.
All of the above.
21
A goat has a gene for white fur, but its fur is black. This is possible because...
The gene for black fur is recessive and "wins" over white
The gene for white fur is recessive and "wins" over black
The gene for black fur is dominant and "wins" over the white
The gene for white fur is dominant and "wins" over the black
22
Ecosystems have different levels of organization. A group of similar organisms make up a
biome
community
habitat
population
23
Which of the following relationships would represent a wolf and a deer?
predator/prey
producer/decomposer
producer/consumer
parasite/host
24
The whale's hind leg bones are shown in the circle. What does this tell us?
A whale's ancestor used to walk on land.
A whale's ancestor used to live in water.
A whale's ancestor used to slither snake-like on land.
A whale's ancestor used to fly
25
Many plant cells, particularly in leaves, are green in color because of the presence of ...
Cytoplasm
Cell walls
Chloroplasts
Mitochondria
26
Which of the following relationships would represent a fallen tree and a mushroom?
predator/prey
producer/consumer
producer/decomposer
parasite/host
27
When the offspring is genetically identical to the parent offspring that is because of...
both asexual and sexual reproduction.
asexual reproduction.
sexual reproduction
28
An organ system of the body...
works with other organ systems to help the body function.
All of the above.
is specialized to perform certain functions.
is made up of multiple organs working together.
29
A muscle cell is specialized to ...
carry gasses, like oxygen & carbon dioxide.
recieve and transmit signals.
provide protection.
contract and relax.
30
What two traits below are acquired?
Hair color & chess ability
Eye color & language
Chess ability & language
Eye color & height
31
The Happy-Face Spiders below are all the same species. What term do these spiders show?
Variation
Evolution
Adaptation
Natural Selection
32
A nerve cell is specialized to ...
receive and transmit signals.
provide protection.
carry gasses like oxygen and carbon dioxide.
contract and relax.
33
Which of the following do animals, bacteria, plants and protists have in common?
Must get and use energy.
reproduce sexually with another organism.
are multicellular.
require oxygen.
34
Species that do not adapt to their environment are likely to...
become extinct.
become evolved.
be changed by their environment.
destory their environment.
35
Which of the following relationships would represent a tapeworm and a cow?
producer/decomposer
producer/consumer
predator/prey
parasite/host
36
What is the most important cell process for growth and development to occur?
Mitochondria
Osmosis
Mitosis
Photosynthesis
37
To perform the activities of life, all cells require...
light.
energy.
oxygen.
chlorophyll.
38
When you are vaccinated, the vaccine...
kills viruses already inside your body.
stimulates your body cells to produce new viruses.
kills bacteria already inside your body.
stimulates your body to fight future infections.
39
What two systems break down necessary nutrients and transport them to the muscles?
Urinary and digestive
Respiratory and circulatory
Digestive and circulatory
Skin and respiratory
40
Which of the following choices lists important reasons that cells divide?
Growth, maintenance, and diffusion
Repair, photosynthesis, and growth
Maintenance, growth, and repair
Photosynthesis, repair, and diffusion
41
Sugar (form of energy) made during photosynthesis can be...
stored for later use.
can be used by other organisms.
used immediately
all of the above
42
Dinosaurs used to roam the Earth. What evidence do we have to support this statement?
Scientists are unsure of the existence of dinosaurs.
Scientists have found many fossilized remains of dinosaurs.
Scientists observed and recorded their extinction.
Scientists found cave paintings of dinosaur-like creatures.
43
All compounds are ....
made of two or more elements.
made of only one atom.
the basic building blocks of matter.
man-made.
44
Fill in this sentence below with the correct words.
DNA, genes
Genes, DNA
Chromosomes, genes
DNA, chromosomes
45
Read the statement below and give your best answer.
The three species live in the same part of the trees.
The three species have the limited supply of food.
The three species occupy different niches.
The three species eat the same food.
46
Sodium is a metal. Chlorine is a gas. When they are chemically combined they form salt.
This is an example of a mixture.
This is an example of a chemical reaction.
This is an example of diffusion.
This is an example of a physical change.
47
A bacterial infection can be treated with or prevented by...
an antibiotic only
a vaccine only
an antibiotic and/or a vaccine
none of the above
48
What happens to the amount of matter (water) as it moves through the ecosystems?
decrease then increase
increase then decrease
stays the same
increases
49
Interpret the pictures below. What TWO life processes do they all have in common?
Breathe and eat food
Reproduce and breathe
Grow and reproduce
Eat food and grow
50
In a food chain, what happens to the amount of available energy as it travels through the chain
Increase then decrease
Stays the same
Decreases
Decrease then increase
51
Arrange the following levels of organization from simplest to most complex:
Organism, organ system, organ, tissue, cell
Tissue, cell, organ, organ system, organism
Cell, tissue, organ system, organ, organism
Cell, tissue, organ, organ system, organism
52
Plants combine H2O (liquid) and CO2 (gas) to make sugar (solid) during photosynthesis.
This is an example of a chemical reaction.
This is an example of diffusion.
This is an example of a mixture.
This is an example of osmosis.
53
What would happen if the cells of your body could not divide?
The cut would take longer to heal.
Your body would heal the cut with cells from other areas.
The cut would be unable to heal.
The cells around the cut would stretch to cover the injury.
54
Two parent organisms is ...
sexual reproduction.
asexual reproduction.
both asexual and sexual reproduction.
55
A person receives their eye color by...
None of the above.
acquiring it over time.
environmental factors.
inheriting it from their parents.
56
Points A, B & C show points where there are no further descendants. What do those points show?
Appearance of life forms
Hibernation of life forms
Diversification of life forms
Extinction of life forms
57
Your body's NATURAL defense against microscopic organisms and foreign substances is...
vaccines
Flintstone vitaminsq
the immune system
antibiotics
58
A viral infection can be treated with or prevented by...
none of the above
an antibiotic only
an antibiotic and/or vaccine
a vaccine only
59
A section of chromosome that codes for a trait is called a ...
gene.
nitrogen base.
centromere.
nucleotide.
60
The forelimbs of all these animals are similar. What does this tell us?
All of these animals share a common ancestor.
All of these animals adapted to the same environment.
All of these animals have the same vestigial organs.
All of these animals survived the same mass extinction.
61
Approximately what percentage of your genes came from your biological mom?
It depends on whether you are a boy or a girl.
50%
75%
25%
62
Which of the following structures is found in plant cells but not in animal cells?
Mitochondria
Nucleus
Cell Wall
Cell membrane
63
How are the reproductive cells in the picture below different from other cells?
They have triple the amount of genes.
They have half the amount of genes.
They have no genes.
They have double the amount of genes.
64
What is the role of a decomposer in a food web?
It changes chemical energy into solar energy.
It changes solar energy into chemical energy.
It gets energy by breaking down once living matter.
It gets energy by eating living matter.
65
You have a sore throat and a fever. This was caused by...
being outside in the cold for too long.
wet feet and hair
improper nutrition
being infected by a germ
66
Trees, rocks and a ping pong table are all ....
Filled with DNA
Made of cells
Alive
Made of elements
67
A skin cell is specialized to ...
receive and transmit signals.
carry gasses, like oxygen & carbon dioxide.
contract and relax.
provide protection.
68
Offspring have genetic information from both parents is because of...
sexual reproduction.
asexual reproduction.
both asexual and sexual reproduction.
69
All molecules are...
man-made.
made of only one type of atom.
the basic unit of an element.
made of two or more atoms.
70
Bacteria, viruses, parasites, and fungi...
all need to energy to survive
all have the ability to interfere with normal body functions
all can be treated with antibiotics
all live in moist environments
71
Inherited traits are passed from parents to offspring....
by cell division.
through genes located on chromosomes
in unpredictable patterns.
during spontaneous generation.
72
Camouflage allows organisms to blend in with their environment. This is an example of...
Evolution
Natural Selection
Overproduction
Adaptation
