Nature of science
Sarah is following another student's written procedures for an experiment that already performed.
Is this replication or repetition
What is replication
Evidence that life on Earth has changed over time is buried within the Earth. What is this evidence?
What is fossils
In 1859, Charles Darwin proposed his theory of evolution based on natural selection. What observation about the natural world does this theory explain?
A. how the fossil record was formed
B. how species change over time
C. how a species always retains its characteristics
D. how catastrophic events lead to extinctions
What is B how species change over time
Seth wants to know the approximate age of a rock he has found. Which method relates the rock's age to the rate at which elements in the rock decay?
What is radiometric dating
Which level of organization is the MOST complex, based on both size and structure?
What is Organism
What step in the scientific method usually leads to further investigation regardless of whether it is supported by data or not.
What is Hypothesis
A reptile fossil has been found. It shows evidence of modified scales that look similar to bird feathers. What inference can be made based on this evidence?
A. Reptiles evolved directly into birds.
B. It shows a link between ancient reptiles and birds.
C. The reptile species was alive at the same time as birds.
D. The reptile species went extinct due to the evolution of birds.
What is B It shows a link between ancient reptiles and birds
In 1859, Charles Darwin proposed his theory of evolution based on natural selection. What observation about the natural world does this theory explain?
A. how the fossil record was formed
B. how a species change over time
C. how a species always retains its characteristics
D. how catastrophic events lead to extinctions
What is B how a species change over time
Elena is asked to show her class evidence of changes to Earth's surface overtime. Name a natural processes that Elena could use to show that Earth has changed over its geologic past?
What is weathering
The heart is a structure that pumps blood throughout the human body. List the levels of organization that form the heart?
What is
atoms > molecules > cells > tissues > organ
Which best describes the relationship between a hypothesis and a controlled experiment?
A. The hypothesis defines the independent variable and the dependent variable in a controlled experiment
B. The hypothesis proposes an explanation to a research question or problem that can be tested through a controlled experiment
C. They hypothesis predicts how a controlled experiment will turn out
B The hypothesis proposes an explanation to a research questions or problem that can be tested through a controlled experiment
Fossils provide clues about the organisms that have lived on Earth. Which statement is consistent with the fossil record?
A. All species that have existed on Earth are still alive today
B. Most species that have existed on Earth are not extinct.
C. Simpler forms of life always evolve from more complex forms
D. The fossil record contains evidence that living things have not changed
What is B Most species that have existed on Earth are now extinct
The theory of evolution by natural selection states that certain organisms are more likely to survive and reproduce than others. What do these organisms possess in order to survive?
What is the ability to adapt
The time at which a sedimentary rock was formed can be difficult to determine. Which reason does NOT explain why sedimentary rocks are hard to date?
A. The absolute age of a sedimentary rock can be determined indirectly by radiometric dating of the fossils found within the rock
B. A sedimentary rock is always younger than the particles that compose it
C. Sedimentary rocks are often composed of particles of different ages
D. Sedimentary rocks often contain no radioactive elements and thus cannot be dated radiometrically
What is A
The absolute age of a sedimentary rock can be determined indirectly by radiometric dating of the fossils found with the rock.
Organ systems work together to meet the needs of the human body. How is the skeletal system related to the nervous system?
The skeleton protects the brain and spinal cord
Katelyn conducts an experiment that requires her to throw an object at a target 20 times.
Is this replication
repetition
both
What is repetition
Although it is incomplete, the fossil record provides scientists with a great deal of information about species that have lived on Earth throughout its history. Which of the following statements does the fossil record support?
A. All organisms that have ever existed on Earth continue to live on Earth today
B. Earth's organisms have remained unchanged throughout its history
C. Dinosaurs are the only types of organisms that have become extinct
D. Not all species that are alive today were alive in the past
What is D
Not all species that are alive today were alive in the past
Extinction occurs when all members of a species die. What is a reason a species becomes extinct?
What is the species lack adaptations to survive the change in the environment
Scientists find a fossil of a fish on top of a mountain. What kind of evidence does the fossil provide scientists about the way this area might have changed over time?
It shows that the mountain may have once been under water
Sandy's doctor said that she may have a disease known as Cellac's disease because the nutrients from her food are not being absorb properly.
What system and organ could be causing this problem?
What is
digestive system and small intestine
Samuel writes his own procedures and then has a friend complete 20 trials
Is this replication
repetition
both
What is Both
replication=friend did the experiment
repetition=20 trials
How does the use of radioactive dating help scientists develop the evolutionary tree of fossilized organisms?
A. It tells when a fossilized organism was born.
B. It tells where a fossilized organism was found.
C. It tells the absolute age of a fossilized organism.
D. It tells how quickly new species evolved from fossilized organisms.
What is C It tells the absolute age of a fossilized organism
Some weed species have developed the ability to resist pesticides. How does the theory of evolution by natural selection help to explain this ability?
A. Due to genetic variations, some weeds in the population had the ability to resist pesticides.
B. The weeds developed pesticide-resistant variations because their survival depended on it.
C. As the weeds evolved, natural selection resulted in an unfavorable variation in a population.
D. In any population of weeds, some weeds will be naturally immune to all kinds of pesticides.
What is A. Due to genetic variations, some weeds in the population had the ability to resist
pesticides.
Jamal notices the layers in a rock formation while hiking in the mountains. A park ranger tells him that in this formation, the lowest layers of rock are NOT the oldest. How could you explain this situation?
The layers of rack had shifted from their original position
In order to maintain homeostasis, the systems of the human body work together to supply our cells with needed substances. Which of the following statements describes how the human body responds to exercise?
A. The circulatory system delivers oxygen to the cells faster, to enable the muscles to convert energy at an increased rate
B. The muscular system moves the bones to allow cellular respiration to take place
C. The digestive system carries nutrients to the muscles of the muscular system to help contract and warm the muscles
D. The skeletal system produces more blood cells that circulate through the blood vessels, increasing blood flow
What is A The circulatory system delivers oxygen to the cells faster, to enable the muscles to convert energy at an increased rate