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7th Grade Science Final Study Guide Part 1
Test Description: Comprehensive 7th Grade Science study guide
Instructions: Answer all questions to get your test result.
1) Which of the following organelles use carbon dioxide to produce sugars during the process of photosynthesis?
A
vacuoles
B
ribosomes
C
mitochondria
D
chloroplasts
2) Plants are unable to move to a new location in response to changes in their environment. Plants, instead, maintain balance by storing excess water in nutrients in their cells. Which organelle is responsible for this?
A
cytoplasm
B
nucleus
C
vacuole
D
mitochondria
3) Which of the following systems breaks food into nutrients that can be used by the body?
A
circulatory
B
reproductive
C
respiratory
D
digestive
4) The kidney filters the blood of waste and removes it from the body with the help of which body system?
A
digestive
B
endocrine
C
excretory
D
respiratory
5) Which pair of body systems is responsible for providing structure support for humans?
A
skeletal and muscular
B
integumentary and circulatory
C
nervous and skeletal
D
skeletal and circulatory
6) As a person exercises, carbon dioxide (CO2) levels in the blood increase. This causes the nervous system to signal which of these systems to respond?
A
digestive and excretory
B
circulatory and endocrine
C
excretory and respiratory
D
respiratory and circulatory
7) Which human organ system produces most of the hormones that regulate body functions?
A
nervous
B
muscular
C
endocrine
D
digestive
8) During which process does genetic material come from two parents?
A
respiration
B
asexual reproduction
C
sexual reproduction
D
photosynthesis
9) If a hydra reproduce asexually at the same rate, how many organsms will there be after 50 hours?
A
48
B
32
C
40
D
55
10) What advantage does a species that reproduces sexually have over a species that reproduces asexually?
A
Only one parent is necessary for reproduction.
B
The offspring are identical to the parents.
C
No sex cells are needed for reproduction
D
There is greater variation among the offspring.
11) Which example would result in new cells that are most different from the parent cells?
A
sperm and egg cells uniting to produce fertilized egg cells
B
yeast cells splitting into new cells
C
bacteria cells dividing into new cells
D
skin cells dividing to produce more skin cells
12) Chromosome is to nucleus as DNA is to -
A
cell membrane
B
cytoplasm
C
chioroplast
D
gene
13) What is the function of DNA in a cell?
A
carrying genetic material
B
providing energy for activities
C
storing and releasing chemicals
D
regulating the movement of nutrients
14) The basic life functions of an organism are carried on by -
A
nutrients
B
atoms
C
cells
D
hormones
15) One important difference between living things and nonliving things is that only living things have
A
molecules
B
compounds
C
cells
D
elements
16) According to the cell theory, all organisms extract energy from food to sustain life. Which body system is primarily responsible for ensuring that cells have the energy they need available to them?
A
digestive
B
endocrine
C
excretory
D
circulatory
17) Which of the following examples represents a chemical change that occurs in the mouth during digestion?
A
tongue pushes food around mouth
B
teeth mashes food
C
food mixes with water in saliva
D
enzymes in saliva break apart starches and fats in food
18) IN the large intestine, excess water is removed from waste before it is removed from the body. Why is this an example of a physical change that occurs during digestion?
A
acids help remove the water from the waste
B
a temperature change occurs
C
a state of matter (liquid to solid) change occurs
D
a new product is formed
19) Which process involves choosing certain organism to reproduce with one another in order to pass on specific, desirable traits to their offspring?
A
selective breeding
B
natural selection
C
resource acquisition
D
asexual reproduction
20) Which situation is the best example of ecological succession?
A
Each of several species uses the same amount of resources
B
The populations in an area remain the same
C
One species replaces another species in an ecosystem
D
An organism survives a difficult winter.
*select an answer for all questions
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