WorksheetsPMA Q1 Review
Total questions: 35
Worksheet time: 37mins
Joe tells Gabby his theory about why sea turtles nest on the beach instead of in the ocean. He says, “The turtle eggs would sink to the bottom of the ocean, and the baby turtle would drown. I know this because my uncle is a fisherman, and he told me this information. Gabby tells Joe that his theory is not scientific. Why does Joe’s idea not meet the requirements to be a scientific theory?
Joe’s idea is already a scientific law.
Joe’s idea is not supported by scientific evidence.
Joe’s idea is a good guess that can be tested by experiments.
Joe and his uncle are not scientists.
In 1897, Joseph Thomson discovered that atoms contained electrons. He proposed a change in the atomic theory of that time, and the theory was modified because of his discovery. Since Thomson’s discovery, atomic theory has been further modified. What is the best explanation for why scientific theories are modified?
Theories more than ten years old are usually out of date.
Scientists want to prove that the work of other scientists is wrong.
New evidence that supports a change prompts scientists to modify earlier theories.
So much information is available today that it is harder to focus research and disprove theories.
The law of universal gravitation states that both mass and distance of objects affect the gravitational force between them. Gravitational force increases as the mass of the objects increase. Gravitational force decreases as distance between the objects increases. Why are these statements considered scientific law, and not scientific theory?
The statements tells what happens, and not why it happens.
The statements involve mass and distance measurements.
The statements explain the attractive force between two objects.
The statements predict what will happen under certain conditions.
Lilly was trying to explain to her friend the difference between a theory and a law in science. She used the theory of plate tectonics and the law of superposition as examples. Lilli explained the difference by using non-scientific language. Which statement could Lilly use to correctly describe the difference between a theory and a law in science?
A theory describes a natural event, while a law explains it.
A theory explains a natural event, while a law predicts it.
A theory explains a natural event, while a law describes it.
A theory predicts a natural event, while a law explains it.
Which of these can change when new evidence is presented?
theory
law
Which of these can be represented mathematically and provide no explanation why a phenomenon occurs?
theory
law
Scientists create both scientific theories and scientific laws as they make observations and conduct experiments about the natural world. Which of the following statements most accurately compares the difference between scientific theories and scientific laws
science laws are based on evidence while science theories are not
science theories involve only biology, while laws involve all types of science
science theories involve mathematical equations, while science laws are based on observations
science theories are ideas that explain natural events, while science laws predict what will happen in a natural event.
Sir Isaac Newton was sitting under an apple tree one day when an apple hit him on the head. He wondered why the apple fell and eventually developed what became the law of gravity. Why is gravity considered a scientific law and not a scientific theory?
The law of gravity describes the attraction between particles in the universe.
The law of gravity explains why the particles attract each other.
Gravity is not a law, it is a theory
The law of gravity explains why the apple hit him on the head.
The things that are kept the same to ensure the results are due to the experiment is called..
Constant
Dependent Variable
Independent Variable
Angel wants to know if the type of soap has an effect on how clean her clothes get. What is the dependent variable?
type of soap
how clean the clothes are
Maddie wants to determine if the weight of the dog will determine the number of puppies in a litter. What is the independent variable?
weight of dog
number of puppies
The attractive force that exists between all objects that have mass
Weight
Gravity
Mass
Magnetism
leaves blowing in the wind is an example of a
contact force
noncontact force
magnet attracting a nail
contact
noncontact
a leaf falling from a tree
contact
noncontact
lightning going through the sky
contact
noncontact
a bat hitting a baseball
contact
noncontact
All forces have what two things
strength and speed
speed and direction
strength and direction
speed and size
What does gravity depend on?
mass and weight
speed and distance
distance and direction
mass and distance
gravity is an example of what
contact force
noncontact force
weight
mass
Running?
What do call the transfer of energy from one form to another form?
Energy Consumption
Energy saving
Energy Transformation
Energy Conservation
SC.7.N.1.2
Scientists frequently repeat the experiments of others scientists. Why is this important in science?
a. Scientists often ask each other for help in performing experiments.
b. Replication of experiments helps to confirm and verify results.
c. Scientists frequently perform other scientists’ experiments in order to practice their technique.
d. Repeating experiments is an effective way to make sure a laboratory is in optimal condition.
a
b
c
d
What is the BEST reason you always repeat an experiment?
Make sure your data is consistent and accurate
Make sure your data supports your prediction
Make sure your experiment is easy to do
Make sure your experiment has lots of data
