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WorksheetsSCIENCE SEMESTER FINAL Review
Total questions: 19
Worksheet time: 10mins
Which step of the scientific method comes after forming a hypothesis?
A. Ask a question
B. Analyze data
C. Conduct an experiment
D. Draw a conclusion
Which of the following is an observation?
The plant needs water.
The leaves are drooping.
The student forgot to water the plant.
The plant will die soon.
What is the smallest unit of life?
Organ
Tissue
Cell
Organ system
Maintaining a stable internal environment is called:
Feedback
Homeostasis
Stimulus
Response
A feedback mechanism that reverses a change is:
Positive feedback
Negative feedback
Neutral feedback
Chemical feedback
Which is a sign of a chemical reaction?
Melting ice
A color change
Freezing water
Cutting paper
The substances present before a chemical reaction are called:
Products
Catalysts
Reactants
Elements
Which law states that mass is not created or destroyed in a reaction?
Newton’s First Law
Law of Inertia
Law of Conservation of Mass
Newton’s Second Law
According to Newton’s First Law, an object in motion will:
Stop immediately
Slow down without force
Keep moving unless acted on by a force
Change direction automatically
Which equation represents Newton’s Second Law?
F = m + a
F = ma
a = mF
m = Fa
Explain the difference between an observation and an inference. Give one example of each.
An observation is something you notice using your senses, while an inference is a conclusion you draw based on those observations. For example, seeing dark clouds is an observation; thinking it will rain is an inference.
An observation is a guess about what will happen, while an inference is what you see directly. For example, predicting rain is an observation; seeing clouds is an inference.
An observation is a conclusion based on evidence, while an inference is a random thought. For example, thinking it will rain is an observation; seeing clouds is an inference.
An observation and an inference are the same thing. For example, seeing clouds and thinking it will rain are both observations.
Choose one human organ system and name two organs in the system that work together.
Digestive system: stomach and intestines
Respiratory system: heart and lungs
Nervous system: kidneys and bladder
Circulatory system: liver and pancreas
Negative feedback helps regulate body temperature on a hot day by responding to a stimulus and maintaining homeostasis. Which of the following best describes this process?
The body detects increased temperature (stimulus), responds by sweating, and returns to homeostasis.
The body ignores the temperature change and maintains its current state.
The body increases its temperature further in response to the stimulus.
The body responds to cold by shivering, maintaining homeostasis.
Which of the following is a sign that a chemical reaction has occurred, along with a real-world example?
Change in color, such as iron rusting
Change in shape, such as cutting paper
Increase in size, such as inflating a balloon
Change in temperature, such as melting ice
Explain why it is harder to push a full shopping cart than an empty one using Newton’s Second Law. Use the words force, mass, and acceleration.
It is harder to push a full shopping cart because it has more mass, so it requires more force to achieve the same acceleration.
It is harder to push a full shopping cart because it has less mass, so it requires less force to achieve the same acceleration.
It is harder to push a full shopping cart because it has more mass, so it requires less force to achieve the same acceleration.
It is harder to push a full shopping cart because it has less mass, so it requires more force to achieve the same acceleration.
Living things are made up of units called
DNA
Cells
Homeostasis
Seeds
True or False: Atoms are larger than cells.
True
False
Cells with the same function combine to form a
organ
tissue
system
organism
