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Part 1 / S.C. End Of Year 7th-grade Science Review
Test Description: S.C. End of Year Unit Review 7th grade Chemistry, Cells, Human Body systems, Heredity, Ecology
Instructions: Answer all questions to get your test result.
1) The job of the excretory system is to remove water and salts from your body and store them in your bladder, what is produced and expelled from the body?
A
urine
B
feces
C
blood
D
urea
2) What would happen to the population of a predator if its prey suddenly disappeared?
A
the prey population would rise
B
the predator species would decrease
C
the prey would never completely disappear
D
Nothing would change
3) A tapeworm is an organism that lives inside the intestines of larger animals, including humans, and takes nutrients from its host. This type of symbiotic relationship is called
A
Hosting
B
commensalism
C
parasitism
D
mutualism
4) What organelle performs cellular respiration and known as the powerhouse of the cell?
A
Nucleus
B
Vacuole
C
Lysosome
D
mitochondria
5) What are the reactants and products of photosynthesis?
A
reactants- water, carbon dioxide, and Sunlight / Products- sugar and Oxygen
B
products- water, oxygen, and Sunlight / reactants- sugar and Oxygen
C
products- H20, O2, and Sugar/ reactants- sugar and Carbon dioxide
D
products- H20, CO2, and Sunlight / reactants- sugar and Oxygen
6) Large regions of the world that have different climates are called
A
ecosystems
B
biosphere
C
biomes
D
habitats
7) ______________________ are composed of two or more different substances that retain their own individual properties and are combined physically.
A
Physical change
B
mixtures
C
homozygous
D
Chemical change
8) Plants use an organelle called a _______________ to perform ____________ and create their own food.
A
Chloroplasts, cellular respiration
B
Nucleus, cellular respiration
C
Nucleus, photosynthesis
D
Chloroplasts, photosynthesis
9) In a chemical reaction the mass of the reactants must ___________ the mass of the products.
A
be equal to
B
be less than
C
be greater than
10) The set of genes carried by the organism is called the ___________ .
A
phenotype
B
genotype
11) The physical expression of the genes is called the _______________ .
A
genotype
B
phenotype
12) When an animal’s habitat begins to be destroyed, what is the animal’s response?
A
It will adjust to new surroundings
B
No affect on the animal
C
It will move in with other animals
D
Death and possible extinction
13) Mixtures can be separated ______
A
they can't be seperated
B
chemically
C
by physical means
14) What energy role do animals function as in a food web?
A
consumers
B
prey
C
carnivores
D
decomposers
15) Cells are the smallest unit that can carry on all functions of
A
life
B
death
C
elements
D
molecules
16) What type of organism would be at the top of an energy pyramid? ___________ The bottom? _________
A
producer, Apex predator
B
Producer, Consumer
C
carnivore, producer
D
secondary producer, herbivore
17) Protons have a __________ charge, Neutrons a ____________ charge, Electrons a _________ charge
A
neutral, positive, negative
B
neutral, negative, positive
C
positive, neutral, negative
D
negative, neutral, positive
18) The top of the soil profile is mostly composed of ________ ________ and the bottom of the soil profile is mostly composed of ___________
A
silt; gravel.
B
gravel; rocks.
C
top soil; organic matter.
D
organic matter; rocks.
19) Commensalism
A
Both Benefit
B
One Benefits, One suffers
C
One benefits, One not affected
20) Mutualism
A
Both Benefit
B
One benefits, One not affected
C
One Benefits, One suffers
*select an answer for all questions
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