NEW
Font size
WorksheetsBenchmark Review 1st Quarter 2024
Total questions: 35
Worksheet time: 26mins
A group of students is studying the effect of temperature on the density of air. They obtained the following results from a controlled experiment, and conclude that air density is directly related to temperature. What statement best supports their conclusion?
Lower temperatures had higher density values than higher temperatures.
Lower temperatures had lower density values than higher temperatures.
Higher temperatures had higher density values than lower temperatures.
Higher temperatures did not cause any changes in density values.
Tyler is conducting an experiment in order to determine the effect that fertilizer A and fertilizer B have on the grass in his yard. He conducts multiple trials and concludes that the grass grows faster and thicker with the application of fertilizer A. How could Tyler make sure his results were valid?
Tyler could change the amount of water each sample of grass received.
Tyler could add a third fertilizer to his experiment.
Another scientist could replicate the experiment.
Another Scientist could offer suggestions to make the experiment better.
Tania is studying the effects of acids on rocks by pouring lemon juice, vinegar, and water over pieces of chalk. Based on Tania’s procedure, shown below, why would the results from this experiment be inaccurate?
1. Place a piece of chalk that is 3 cm long in three separate beakers so that there is one piece in each beaker.
2. Pour vinegar into one beaker, lemon juice into the second beaker, and water into the third.
3. After 1 minute, take the chalk out. Measure and record the amount of solid chalk that remains.
4. Repeat steps 1-3 four times.
Her procedure does not tell us how she came up with her idea for her experiment.
She should have used bigger pieces of chalk.
Her procedure is too short.
Her procedure does not list how much vinegar, lemon juice, and water should be used.
Referring to the tables below, John and Tim each conducted a controlled experiment, comparing how two surfaces absorb heat over time. After conducting the experiment with repeated trials, both John and Tim received significantly different results. After reviewing the tables, why are John's results considered more reliable/valid?
John conducted more trials for the experiment.
Both used different materials in the experiment.
John followed the procedures more precisely.
Tim collected the data at different times during the day.
Naomi watches birds at a bird feeder for one week and records the number of birds seen there each day. Javier places three different types of food in separate bird feeders and records the number of birds seen at each feeder every day for one week. Which student is conducting an experiment?
Naomi is conducting an experiment because she is recording data.
Naomi is conducting an experiment because her investigation has controlled variables.
Javier is conducting an experiment because his investigation has controlled variables.
Javier is conducting an experiment because he is recording data.
A group of students want to investigate erosion occurring naturally on a riverbank. The students decide to take pictures of the riverbank each day over a period of 12 months, then record what changes they see in the photos. What is the most significant limitation to this type of investigation?
Qualitative data cannot be collected from photos.
Variables, such as the weather, cannot be controlled.
The primary cause of erosion cannot be identified.
The exact amount of erosion cannot be measured.
Diana and Jane are conducting the same scientific experiment. The experiment involves dropping different colored balls and measuring the maximum height of the first bounce in centimeters. When they compare their results, they notice that their data is very different. Which of the following is the LEAST likely explanation for the discrepancy in their data?
Diana and Jane dropped the balls from different heights.
Diana and Jane used different brands of bouncy balls.
Diana and Jane dropped the bouncy balls on different surfaces.
Diana and Jane conducted their experiment at different times of the day
Why is it important for scientists to share not only their results, but also their procedure with other scientists?
Scientists don’t care about results, they only want to know the procedure.
So scientists can repeat the experiment and compare methods used, results obtained, and offer further explanations.
A scientist’s findings can only become a Law if it is repeated 10 times.
Other scientists can compare methods and then copy your data if you used the same method.
Scientific knowledge may change as new evidence or information is discovered. Which of the following would NOT be a result of new scientific research and information?
A scientific name is assigned to a recently identified plant species.
An endangered monkey species is put in a reserve for protection from extinction.
A newly discovered chemical element will be added to the periodic table of the elements.
A nonnative plant species will begin to reproduce rapidly after being introduced into a swamp ecosystem.
A scientist has been studying bullfrogs for many years. She has noticed that these bullfrogs are now laying eggs 8 days earlier than they did 20 years ago when she first began studying them. The tree trees around the pond have also grown taller and shade the water more than they did 20 years ago. What would be the best thing for the scientist to do next?
Conduct more research to see if she can determine why they are laying eggs earlier.
Choose a different species of frog to study for the next 20 years.
Conclude that the changed tree heights have affected the frogs.
Assume that the water temperature must have risen so frogs can lay eggs earlier.
What is a scientific theory?
A scientific theory is a well-supported and widely accepted explanation of nature.
A scientific theory is a statement made by scientists.
A scientific theory is the first stage of an idea before it becomes a scientific law.
A scientific theory is a prediction of how nature works.
The theory of plate tectonics states that continents move because convection currents in the mantle push oceanic plates rebuilding new seafloor that pushes on the continental plates. Why is plate tectonics a scientific theory?
It predicts the movement of the plates.
Plate tectonics proved that oceanic crust is less dense than continental crust.
Plate tectonics provides an explanation for how the plates move.
Plate tectonics proved that oceanic crust is made.
Jupiter has about 317 times more mass than Earth. What can you infer from this fact?
That Jupiter’s gravitational force is much weaker than on Earth’s gravitational force.
That Jupiter’s gravitational force is much stronger than Earth’s gravitational force.
That Jupiter’s and Earth’s gravitational forces are equal.
Mass has no effect on the gravitational force between two objects.
After walking across a carpeted floor in socks, Jim brings his finger near a metal doorknob and receives a shock. What does this demonstrate?
Frictional forces require direct contact.
Electrical forces require direct contact.
Electrical forces can act at a distance.
Frictional forces can act at a distance.
Which type of force can act only when two objects touch each other?
frictional
electrical
magnetic
gravitational
Which of the following statements about the Law of Gravity is correct?
Only large objects exert gravitational force on other objects.
Only objects that are close together exert gravitational forces on each other
No objects exert gravitational force on other objects.
Every object exerts gravitational force on other objects.
According to the Law of Gravity, what does force depend on?
It depends on the distance between the objects and the mass of each object.
It depends on the density of each object.
It depends on the weight of each object.
It depends on the distance between the objects and the speed at which they are moving.
Which of the following demonstrates an unbalanced force?
A dog pushes its dog dish to the left with a force of 4 N. A cat pushes it to the right with a force of 4N.
A child pushes a toy car to the left with a force of 3 N. Their parent pushes the same toy car to the right with a force of 3N.
A woman pushes a bike to the right with a force of 10 N. Another woman pushes the same bike to the left with a force of 10 N.
A man pushes a desk to the right with a force of 16 N. Another man pushes the same desk to the left with a force of 10 N.
Scientific theories are developed over time in all areas of science. Which statement best describes scientific theories?
They are based on scientific laws that came first.
They are pieces of scientific evidence that support a hypothesis.
They are explanations of scientific events that may change based on continuous research.
They are predictions of events that usually remain constant because scientific ideas rarely change.
Brittany is investigating plant growth. She completes the following activities in class. Which statement best describes why activity 1 is an experiment and activity 2 is an investigation?
only activity 1 has a control and variables
only activity 1 requires the adding of fertilizer
activity 1 requires more trials than activity 2 does
activity 1 takes more time to set up than activity 2 does
Joanna and Mason hang a small box from a string and place two identical electric fans near the box. When they turn both fans to the same setting, Joanna and Mason observe that the box begins to swing toward the right, as shown in the illustration below. Joanna claims that she can balance the forces on the box without turning off the fans. Which of the following would most likely produce the change in motion necessary to support Joanna's claim?
Change the angle of Fan 2 so that it is blowing air onto the bottom of the box.
Move Fan 2 so that both fans are blowing air onto the left side of the box.
Change the setting of Fan 2 so that it is blowing less air than Fan 1 is.
Move Fan 2 so that it is the same distance from the box as Fan 1 is.
In 1980, a scientific journal published an article describing the observations that led to a hypothesis. The hypothesis stated that an asteroid striking Earth brought about the extinction of the dinosaurs. Which of the following would best provide support for a scientific hypothesis?
new evidence and additional observations
opinions and personal beliefs
new evidence and personal opinions
additional observations and informed predictions
An object moves through space with balanced forces acting on it. Which statement best describes the speed and direction of the object as long as the forces acting on it remain balanced?
The speed and direction of the object will both change.
The speed and direction of the object will remain constant.
The speed will change, but the direction will remain constant.
The speed will remain constant, but the direction will change.
A scientist performs an experiment and asks other scientists around the world to replicate it. Why would other scientists MOST LIKELY try to perform the same experiment?
to find out if the weather of various regions of the world would affect the results
to see if the experiment would be less expensive in another part of the world
to confirm the results of the experiment conducted by the scientist
to verify that the hypothesis of the experiment is a scientific law
When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What is the outcome (dependent) variable?
the same type of plant
different fertilizers
the same amount of light
the growth of the plant
SC.6.N.1.2
Experiments are often repeated many times by the same or different scientists. What is the most important reason more than one scientist should conduct an investigation using the same methods?
a. If the results are the same, replication of the investigation helps to confirm the results.
b. The competition makes the scientists work more carefully.
c. More than one scientist is interested in the problem.
d. Different scientists might perform the experiment differently.
a
b
c
d
SC.7.N.1.2
Cara read an article on why repetition and replication are so important, but she did not understand the difference between them. Which of the following best explains the two terms?
a. Repetition is when a scientist repeats an experiment; replication is when a scientist conducts an experiment on genetic material.
b. Repetition is when a scientist does the same experiment a number of times; replication is when other scientists reproduce a scientist’s experiment.
c. Repetition is when a scientist publishes in more than one scientific periodical; replication is when another scientist reproduces another scientist’s results.
d. Repetition is when a scientist commits an error in an experiment the first time and must repeat it; replication is when a scientist repeats an experiment to make sure it is valid.
a
b
c
d
Jacob says that science is just a huge collection of unchangeable facts. Which of the following explanations BEST shows why Jacob is wrong?
Science includes not just facts but also concepts
Science is a process that allows for ideas to be changed as new evidence is presented
Science is the systematic collection of those unchangeable facts
Science facts can be changed as long as all scientist agree with the change
Students in a class conduct experiments on the percent of oxygen in the air. When discussing their results, it is discovered that a group came to different conclusions. What should they do?
Change their data to reflect the known percentage of oxygen in the air.
Find the range between the highest and lowest percentage found.
Compare methods used and identify possible errors
Vote on the group with the best procedure and copy their results
A person pushes a cart forward with a force of 25 N. A friction force of 15 N pushes the cart backward.
What is the net force on the cart?
10 N backward
10 N forward
40 N forward
40 N backward
Ike uses a hammer to hit a nail into a board on the floor. How does gravity make it easier to
hammer the nail?
Gravity pulls the nail down, but it does not pull on the hammer
Gravity pulls the hammer down so it pushes on the nail
Gravity pushes the board up to help the nail go in
Gravity pushes the board and the nail toward one another
Identify the contact force from the following choices:
A leaf falls to the ground.
A girl pulls the plug on her hair dryer.
A magnet pulls on a nail that is 1 cm away.
A boy’s hair is pulled toward an electrically charged balloon.
Forces act on objects that are either in direct contact or at a distance. Which forces act to keep a book
on a table?
Mass and magnetic forces
Gravitational and applied forces
Friction and magnetic forces
Gravitational and electrical forces
In the picture below, the masses of the three cars are equal, but the cars each have an additional mass
added on top.
As the mass of the car increases, the amount of force needed to move the car forward increases.
All three cars will need the same amount of force to move forward.
Changing the mass of the cars does not require any extra force to move the cars forward
As the mass of the car increases, the amount of force needed to move the car forward decreases.
