NEW
Font size
WorksheetsBiology Unit Study Guide Answer Key
Total questions: 47
Worksheet time: 24mins
What is biology the study of?
The study of all forms of life.
The study of rocks and minerals.
The study of celestial bodies.
The study of chemical reactions.
What are the eight characteristics of life?
Order, genetic material, reproduction, growth and development, response to the environment, energy processing, regulation (homeostasis), and evolutionary adaptation.
Movement, photosynthesis, excretion, breathing, eating, sleeping, migration, and communication.
Order, photosynthesis, migration, growth, response to light, energy storage, regulation, and adaptation to weather.
Genetic material, movement, eating, reproduction, growth, response to sound, energy storage, and regulation.
Define an organism.
Any living thing that meets all characteristics of life.
A non-living object that can move.
A chemical substance found in cells.
A machine that mimics life.
What is the difference between unicellular and multicellular organisms?
Unicellular have one cell; multicellular have many cells working together.
Unicellular organisms are always larger than multicellular organisms.
Multicellular organisms have only one cell, while unicellular have many.
Unicellular organisms do not need energy, but multicellular do.
Why is reproduction essential for a species?
It ensures the survival and continuation of the species.
It helps individuals live longer lives.
It increases the intelligence of the species.
It allows species to adapt instantly to any environment.
What is the difference between sexual and asexual reproduction?
Sexual requires two parents; asexual requires one parent and produces identical offspring.
Sexual reproduction produces identical offspring; asexual requires two parents.
Asexual reproduction requires two parents; sexual requires one parent.
Both require two parents and produce identical offspring.
How do organisms grow and develop?
Cells divide and specialize according to genetic instructions.
They absorb nutrients without any cellular changes.
They shrink and lose cells over time.
They stop all cellular activity after birth.
What does metabolism mean?
The chemical processes that build up or break down materials to use energy.
The process of breathing in oxygen and exhaling carbon dioxide.
The movement of muscles to produce heat.
The storage of genetic information in the nucleus.
Give an example of a response to the environment.
A plant bending toward sunlight or an animal moving away from danger.
A rock sitting still on the ground.
A book lying on a table.
A car parked in a garage.
What is homeostasis?
Maintaining a stable internal environment despite external changes.
The process of cell division.
The breakdown of food to release energy.
The movement of water across a membrane.
Give an example of homeostasis in humans.
Sweating to cool down or shivering to warm up.
Eating food to gain energy.
Blinking to keep dust out of eyes.
Talking to communicate with others.
Define adaptation.
A trait that helps an organism survive and reproduce in its environment.
A process by which organisms lose their ability to survive.
A sudden change in an organism's DNA.
A behavior that decreases an organism's chance of survival.
Explain how evolution is related to adaptation.
Evolution is the gradual change in species over time as adaptations accumulate.
Adaptation is unrelated to evolution and occurs randomly without any influence.
Evolution only occurs in individuals, not in populations, and is not related to adaptation.
Adaptation is a process that prevents evolution from occurring.
What is the scientific method?
A process used to investigate questions: observe, hypothesize, experiment, analyze, conclude.
A set of laws that never change.
A list of random observations with no analysis.
A way to memorize facts without testing them.
What is an independent variable?
The factor that is changed or manipulated in an experiment.
The factor that is measured in an experiment.
The result of the experiment.
The equipment used in the experiment.
What is a dependent variable?
The factor that is measured or observed in response to the independent variable.
The variable that is always kept constant in an experiment.
The factor that is deliberately changed by the experimenter.
The variable that is not affected by any other variables.
What is a control variable?
A factor kept the same to ensure a fair test.
A variable that is always changed in an experiment.
A measurement taken at the end of an experiment.
A result that is expected every time.
Why is it important to only change one variable at a time?
So the results show the true effect of the independent variable.
To make the experiment more complicated.
To ensure all variables are dependent.
So the experiment takes less time.
What is a hypothesis?
A testable prediction or explanation for an observation.
A proven scientific law.
A random guess with no basis.
A summary of collected data.
What is the purpose of a control group?
To compare results and show if the independent variable causes change.
To ensure all variables are changed at once.
To increase the number of participants in the experiment.
To provide a summary of the experiment's results.
Why is data collection important in an experiment?
It provides evidence to support or reject a hypothesis.
It makes the experiment more expensive.
It ensures the experiment is fun.
It guarantees the experiment will succeed.
What is the International System of Units (SI)?
The metric system used worldwide in science.
A system of traditional British measurements.
A set of computer programming languages.
A type of international currency.
Why do scientists use the metric system?
It’s universal and based on powers of ten, making it easy to convert.
It is only used in the United States.
It is more complicated than other systems.
It is based on random numbers.
List three lab safety rules everyone should follow.
Wear goggles, never eat or drink, and follow teacher directions.
Wear sandals, eat snacks, and ignore instructions.
Use broken equipment, taste chemicals, and run in the lab.
Leave spills unreported, touch your face, and use your phone.
What should you do if there’s a chemical spill in the lab?
Notify the teacher immediately and follow safety procedures.
Ignore it and continue working.
Try to clean it up without telling anyone.
Leave the lab without informing anyone.
Why should you not eat or drink in the lab?
To avoid contamination or accidental ingestion of chemicals.
Because it is too noisy in the lab.
To save time for experiments.
Because food and drinks are not allowed anywhere.
Why must goggles be worn during experiments?
To protect eyes from chemicals or debris.
To improve vision during experiments.
To look fashionable in the lab.
To avoid getting bored during experiments.
What is the proper way to waft a chemical odor?
Gently wave your hand toward your nose instead of sniffing directly.
Sniff the chemical directly from the container.
Place your nose close to the chemical and inhale deeply.
Cover the container and shake it before smelling.
What is the function of the eyepiece lens?
To magnify the image of the specimen (usually 10x).
To illuminate the specimen.
To hold the slide in place.
To adjust the focus of the microscope.
How many lenses does a compound light microscope use?
Two lenses: the objective and the eyepiece.
One lens: only the objective.
Three lenses: the objective, eyepiece, and condenser.
Four lenses: the objective, eyepiece, condenser, and mirror.
What is the total magnification if the eyepiece is 10x and the objective is 40x?
400x total magnification.
50x total magnification.
30x total magnification.
100x total magnification.
What does the diaphragm do on a microscope?
It adjusts the amount of light passing through the specimen.
It magnifies the specimen.
It focuses the image.
It holds the slide in place.
What is the function of the stage clips?
They hold the slide in place on the stage.
They adjust the focus of the microscope.
They provide light to the specimen.
They magnify the image of the specimen.
What is the difference between the coarse and fine adjustment knobs?
Coarse knob makes large focus changes; fine knob makes small precise adjustments.
Coarse knob is used for light adjustment; fine knob is for changing lenses.
Coarse knob controls stage movement; fine knob controls light intensity.
Coarse knob is for color correction; fine knob is for magnification.
What should you never do when using high power on a microscope?
Use the coarse adjustment knob (it could break the slide).
Adjust the diaphragm for more light.
Use the fine adjustment knob for focusing.
Move the stage slowly.
How should a microscope be carried properly?
By holding the arm and supporting the base.
By holding only the eyepiece.
By carrying it with one hand on the stage.
By holding only the base.
Why should you always start with the lowest power objective lens?
To easily locate the specimen and prevent damage.
Because it gives the highest magnification.
Because it is the only lens that works with all specimens.
Because it automatically focuses the microscope.
What does CER stand for?
Claim, Evidence, and Reasoning.
Cause, Effect, and Result.
Compare, Evaluate, and Respond.
Create, Edit, and Review.
What is a claim in a CER explanation?
A statement that answers a scientific question.
A detailed description of an experiment.
A summary of the evidence collected.
A list of materials used in the investigation.
What should evidence include in CER writing?
Data, observations, or results that support the claim.
Personal opinions and beliefs.
Unrelated facts or stories.
Predictions about future events.
How does reasoning connect the claim and evidence?
It explains why the evidence supports the claim using scientific principles.
It repeats the claim in different words.
It ignores the evidence and focuses on opinions.
It provides unrelated facts to support the claim.
What is an example of homeostasis involving blood glucose?
The pancreas releases insulin to lower or glucagon to raise blood sugar levels.
The kidneys filter waste from the blood to form urine.
The lungs exchange oxygen and carbon dioxide during breathing.
The stomach secretes acid to help digest food.
Why is homeostasis important for survival?
It keeps body conditions stable for cells to function properly.
It increases the body temperature continuously.
It causes cells to stop functioning.
It prevents the body from absorbing nutrients.
What unit is used to measure mass?
liter
meter
gram
pound
What is the correct order for the metric ladder?
Kilo, Centi, Deka, Deci, Mill, Base Units, Hecta
Kilo, Hecta, Deka, Base Unit, Deci, Centi, Milli
Milli, Hecta, Deka, Base Unit, Centi, Deci, Kilo
Centi, Deci, Kilo, Hecta, Milli, Base Unit, Deka
What is the unit best used to measure length?
meter
liter
pound
gram
What is that best unit to measure fluids?
gram
liter
meter
pound
