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WorksheetsSemester 1 Review - 7th Grade
Total questions: 55
Worksheet time: 34mins
How many elements are involved in the reaction shown below? (6.5A)
C3H8+5O2---------- 3CO2 + 4H20
7 elements
3 elements
17 elements
19 elements
What is the best prove of a formation of a new substance? (6.5C)
create gas (bubbling)
precipite (creation of a solid)
change of temperature
change of color
Lorena is in the lab trying to demonstrate that she is capable to create a new substance during his experiments. What are the sign of the formation of a new substance? (6.5C)
A chemical reaction where color and temperature change.
A chemical reaction where formation of gas, change of color, and precipitate happens.
A chemical reaction where a formation of gas, change of color, change of temperature, it precipitates, change of odor might happen.
A chemical reaction where a formation of a new substance happens.
Which word describes two or more elements that are mixed together in a fixed proportion? (6.5C)
mixture
Compound
Element
Atom
This organelle controls what goes in and out of plant and animal cells.
Cell Wall
Cell Membrane
Chloroplasts
Cytoplasm
The _____________ stores food, water, wastes, and other materials in both plant and animal cells.
Vacuole
Mitochondria
Cytoplasm
Nucleus
The _____________ holds the DNA, and controls the functions of eukaryotic cells.
Nucleus
Nuclear Membrane
Mitochondria
Chloroplast
The _____________ is a gel-like fluid that fills plant and animal cells. It holds the organelles in place and gives each cell its shape.
Cytoplasm
Cell Membrane
Cell Wall
Chloroplast
What can only be found in plant cells?
Cell membrane
Vacuole
Chloroplast
Mitochondria
What organelle is called the "powerhouse" of a cell?
mitochondria
nucleus
cell wall
cell membrane
True or False? Radiant Energy from the Sun is the light that comes from the Sun.
True
False
The _____________ is an organelle inside a plant cell and is the actual site that photosynthesis takes place.
Chlorophyll
Chloroplast
Xylem
Phloem
This substance in the leaf is responsible for absorbing the sun's energy and also reflects green light waves.
Cell wall
Chloroplast
Chlorophyll
Nucleus
What structure of the leaf transports water and nutrients from the roots to the leaves?
Cell wall
Chloroplast
Phloem
Xylem
Which of the following is not a PRODUCT of photosynthesis?
Carbon dioxide
Glucose
Oxygen
Movement toward a stimulus
hydrotropism
positive tropism
dormancy
stimulus
Movement away from a stimulus
geotropism
hydrotropism
stimulus
negative tropism
A plant's response to touch
thigmotropism
geotropism
hydrotropism
dormancy
The movement of roots toward the ground or the movement of stems away from the ground
hydrotropism
geotropism
thigmotropism
phototropism
The movement of a plant's roots toward water in the soil
thigmotropism
geotropism
phototropism
hydrotropism
The movements in a plant in response to light
phototropism
geotropism
hydrotropism
thigmotropism
The diagram shows a plant growing while lying on its side. How is the plant reacting positively and negatively to gravity?
the root are reacting negatively by growing downward while the stem and leaves are reacting positively by growing upward
the root are reacting positively by growing downward while the stem and leaves are reacting negatively by growing upward
only the roots are reacting by growing downward
only the leaves and stem are reacting by growing upward
Which best describes one disadvantage of asexual reproduction?
It increases biodiversity
It decreases biodiversity
It decreases population size
It increases combination of traits
It produces diverse offspring
Budding is a process in which a new individual is formed that is a clone of the parent. This type of reproduction is _____.
Sexual
Sporulation
Asexual
Binary Fission
Fragmentation
What would be a possible disadvantage of asexual reproduction.
Ability to reproduce in the absence of a mate
Results in low genetic variation of the species
Allows for more genetic variation in the offspring
Takes less time to produce offspring
Ability to reproduce rapidly
Sexual Reproduction _____
results in genetic variation in the offspring
produces offspring that are identical to the parent
decreases the chances of survival of the species
results in genetic material being donated to offspring by only one parent
produces uniform offspring
This system protects the body's internal living tissues and organs, protects against invasion by infectious organism, and protects the body from dehydration.
excretory system
digestive system
integumentary system
respiratory system
This system is responsible for the control of the body and communication among its parts.
nervous system
skeletal system
respiratory system
endocrine system
The breakdown of food into small molecules, which are then absorbed into the body is the main function of which body system.
integumentary system
digestive system
excretory system
endocrine system
The main function of this system is movement, but it also helps stabilize our joints, maintain our posture and generate heat during activity.
reproductive system
nervous system
muscular system
skeletal system
This system provides the structural support for the human body and protects our organs.
digestive system
respiratory system
skeletal system
muscular system
This system is made up of glands that produce and secrete hormones, chemical substances produced in the body that regulate the activity of cells or organs. These hormones regulate the body's growth, and sexual development and function.
excretory system
integumentary system
nervous system
endocrine system
This human body system is a series of organs responsible for taking in oxygen and expelling carbon dioxide.
nervous system
integumentary system
respiratory system
excretory system
This is the system of an organism's body that performs the function of excretion, the bodily process of discharging wastes. This system is responsible for the elimination of wastes produced by homeostasis.
endocrine system
digestive system
excretory system
skeletal system
This system functions to transport blood and oxygen from the lungs to the various tissues of the body.
nervous system
circulatory system
endocrine system
integumentary system
