Font size
Worksheets8th Grade Biology Ch. 1, 2.1 and 2.2 Test Review
Total questions: 45
Worksheet time: 24mins
Science is a(n) _______________ - an organized way of observing and asking questions about the natural world.
choice
process
art
educated guess
Which of these questions could BEST be answered with the methods of science?
How is Earth different from other planets?
What does it mean to be a good person?
Why are we here on Earth?
Will computers make us more or less human?
The goal of science is to:
Prove people in different religions wrong
Provide absolute truths to find the right answers about life
Submit papers to peer review
Provide natural and testable explanations for events in the natural world
Scientific methodology involves:
Growth, metabolism, development, homeostasis, and reproduction
Observing, asking questions, forming hypotheses, conducting experiments, collecting and analyzing data, and drawing conclusions
Control groups, experimental groups, dependent variables, and independent variables
Bias, inferences, observations, and skepticisms
The statement “the flower grew 8 cm on Tues” is a(n):
Observation
Inference
Skepticism
Bias
Testing hypotheses often involves designing experiments. Which of the following is the factor that is observed and measured in an experiment?
control group
experimental group
dependent variable
independent variable
Jane Goodall spent years with the chimpanzees of Gombe. Sitting quietly for hours, she watched the animals closely and took notes about their behavior. What was Jane Goodall doing?
testing variables
watching a control group
making observations
applying a stimulus
An inference is:
The same as an observation
A way to avoid bias
A statement involving numbers
A logical interpretation of an observation
Which field of biology could involve manipulating genes, breeding new plants and animals, or incorporating living systems into an invented device or process?
Microbiology
Biotechnology
Endocrinology
Numismatics
To be useful in science, a hypothesis must be
Measurable
Observable
Testable
Correct
After her run, Aisha felt thirsty. Thirst was her body’s way of telling her she needed more water to maintain
Growth
Metabolism
Development
Homeostasis
Camille notices that the leaves of her pothos plant are drooping this morning. The leaves were not droopy yesterday. She decides the plant needs to be watered. What had Camille just done?
Calculated the probability of the plant’s ability to survive without water
Devised a controlled experiment about the effect of water on plant leaves
Formed a hypothesis based on quantitative data she has collected
Made an inference based on past experience and observation
A skeptical attitude in science
Is unimportant
Means a new idea will only be accepted if it is backed by evidence
Encourages scientists to readily accept new ideas
Prevents scientists from accepting new ideas
Publishing articles in peer-reviewed scientific journals allows researchers to:
Gain supporters
Share ideas
Find answers
Receive praise
Michael’s grandmother is taking part in an experiment to determine how well a new headache medication works. In this experiment, the people in Group A are taking the new medication. The people in Group B, including Michael’s grandmother, are taking a pill that does not contain the new medication. In this experiment, what is Group B?
Group B is the control group.
Group B is the experimental group.
Group B is the independent variable.
Group B is the dependent variable.
Scientists’ understanding of viruses has advanced greatly in the last fifty years. Which two statements provide evidence to support the classification of viruses as nonliving? Select two answer choices.
Viruses are made up of proteins, nucleic acids, and sometimes lipids.
Viruses do not respond to changes in the environment around them.
Viruses contain genetic information in the form of nucleic acids.
Viruses must infect living cells in order to reproduce.
In the metric system, what do the kilogram, kilometer, and kilocalorie have in common?
All measure the same type of quantity, and are interchangeable.
All are units 1000 times larger than a base unit.
All are units 1000 times smaller than a base unit.
All are units 1 million times larger than a base unit.
Tamar is talking about evolution with a friend. The friend says, “It’s just a theory, so I don’t believe it. When they prove it and it becomes the law of evolution, then maybe I’ll change my mind.” Which of these possible replies best describes scientific principles or the work of scientists?
Scientific theories do not become scientific laws; they are explanations for natural phenomena based on evidence.
Science always finds the right answer; the answers that scientists and researchers discover never change.
He should be wary of science because it is based on research and evidence, not bias and opinion.
Scientists take each other at their word regarding experimental results, and the public should, too.
Scientists use the ________________ when measuring, collecting data and performing experiments.
Imperial system
Scientific system
US Customary system
Metric system
Scientists and engineers do different types of work. Which statement BEST compares the methods of science and engineering?
The methods are completely different and unrelated.
The methods are similar, but are not identical with one another.
The methods are identical, but have different names.
The methods are identical and have the same names.
The process in which offspring arise from a single parent and have the genes of that parent only is called:
Sexual reproduction
Biotic reproduction
Asexual reproduction
Symbiotic reproduction
The relatively stable set of internal conditions that organisms maintain is called:
Homeopathic
Internal maintenance
Homeostasis
Body temperature
What subatomic particles make up the mass of the nucleus?
Electrons and neutrons
Electrons and protons
Protons and neutrons
Protons and nucleic acids
The _____________ is positively charged, whereas the _____________ is negatively charged.
Neutron, electron
Proton, electron
Electron, neutron
Proton, neutron
There are nearly 100 naturally occurring chemical elements, but fewer than/about __________ elements are found in living organisms.
95
75
50
20
Van der Waals forces are what keep geckos able to walk up walls because they have very __________ interactions.
weak
strong
bonded
giant
Water molecules have partial charges which makes them __________, and they are able to bond to other water molecules through ____________________.
Nonpolar, covalent bonding
Polar, covalent bonding
Nonpolar, hydrogen bonding
Polar, hydrogen bonding
If your friend took a pH test of a mystery solution and the number came out to 4.5 on the pH scale, what would you tell him?
There are absolutely no hydrogen ions in that solution, which makes it more basic!
There are more hydrogen ions in that solution, which makes it more acidic!
There are more hydroxide ions in that solution, which makes it more acidic!
There are less hydrogen ions in that solution, which makes it neutral!
Household bleach has a pH between 12 and 13. From this information, which of the following BEST describes the bleach solution?
The solution is acidic, meaning it has more hydrogen (H+) ions than hydroxide (OH-) ions.
The solution is basic, meaning it has fewer hydrogen (H+) ions than hydroxide (OH-) ions.
The solution is neutral, meaning it has an equal number of hydrogen (H+) ions and hydroxide (OH-) ions.
The solution is a buffer that reacts with solutions containing high concentrations of hydrogen (H+) ions.
For a scientific claim about a product to be considered reliable, which of the following should have taken place?
The company should have held discussions with leading industry scientists
Technology should have been used in both the gathering of data and data analysis
Results should have been peer reviewed and repeated, producing the same findings
The results of the investigation should have been published in popular magazines
Information gathered from observing a plant grow 3 cm over a two-week period is called
inferences
variables
hypotheses
data
In a hypothesis the ______ variable is what is being tested, while the ______ variable is the one being measured in response.
independent; dependent
independent; control
dependent; independent
control; dependent
A hypothesis is a reasonable and educated ____.
experiment
guess
scientist
test
Which of these is NOT true about hypotheses
It is testable
It is an educated guess
It can be proven false
It is always true
More careful and precise observations provide stronger evidence.
True
False
What must a hypothesis be in order to be considered scientific?
Broad and general
Testable and falsifiable
Repeatedly tested and not rejected
Accepted as fact
Biology is the study of life and living organisms. Experimentation is one method by which biologists pursue scientific explanations. When other scientist can copy the experiment, it is said to be _________.
plausible
replicable
observable
none of the above
Scientists form ____ to explain natural phenomena supported by repeated observations and experiments.
Observations
Ideas
Theories
pseudosciences
What is a hypothesis?
the thing changed on purpose in the experiment
an explanation about what you observed
using your 5 senses to gather data
an educated guess about the outcome of an experiment
The purpose of a controlled experiment is to allow the scientist to isolate and test
several variables
a single variable
conclusion
many data
Why do scientists do experiments?
Because writing grants to fund research is hecka fun!
In order to prove or disprove a hypothesis
Because they love the disappointment of when experiments go wrong
Based on the data this group gathered, the most appropriate hypothesis would be
"If an egg is placed in corn syrup, then it will gain weight."
"If an egg is placed in vinegar overnight, then its shell will dissolve."
"If three eggs are each placed in three different solutions, then the egg in distilled water will lose weight."
"If an egg is placed in a distilled water solution, then the egg will gain weight."
If a company claims that its product has been proven scientifically, which of the following should have taken place if the results are to be considered reliable?
The company should have held discussions with leading industry scientists.
Technology should have been used in both the gathering of data and data analysis.
Results should have been peer reviewed and repeated producing the same findings.
The results of the investigation should have been published in popular magazines.
A process called ____ allows scientists to evaluate the results of research done by other scientists.
the metric system
forensics
peer review
phrenology
Information gathered from observing a plant grow 3 cm over a two-week period is called
inferences
variables
hypotheses
data
