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WorksheetsPart 1 Ultimate 8th Grade Quarter 1 Review
Total questions: 60
Worksheet time: 3600secs
Kenny planned an investigation that would test the effects of exercise on heart rate. He asked five classmates to run around the school track. He measured their heart rates before and after they ran. The results of his experiment are shown in the table. Which conclusion is BEST supported by the data in the chart?
The amount of sweat each student produced increased based on how far they ran around the track.
The heart rate of a person exercising changed based on what foods they ate.
The age of a student determines how much their heart rate increases with exercise.
Exercise causes heart rate to increase but not the exact same amount for every person.
Students place soil from the playground in a stream table. They sprinkle water on the upper end and observe the result. The students repeat the same process using soil from other places around the school campus. Which question are the students trying to test?
Does the stream table's slope affect erosion?
Does soil type affect soil erosion?
Does the stream table length affect soil erosion?
Does the volume of water affect soil erosion?
James is investigating the germination of been seeds. He plants 30 bean seeds each in three identical square containers and plans to give the same amount of sunlight and water to each container in a different room, with each room at a different temperature. Which of these hypotheses is the MOST appropriate for this research project?
If the size of the container is smaller, then the number of seeds that germinate will increase.
If the temperature of the room is lower, then the number of seeds that germinates will decrease.
If the amount of water given to the seeds is higher, then the number of seeds that germinate is higher.
If the number of seeds planted in the container increased, then the the number of seeds that germinate will increase.
Students in Ms. Smith's class are testing the effects of light on the growth of mold of bread. They have 6 slices of bread they plan to leave on a classroom table and monitor for two weeks. They place 3 of the slices in brown paper bags that light cannot pass through. Which type of bag would they use for the other 3 pieces of bread, considering that they want to test the effects of light on the growth of mold?
a white paper bag
a black paper bag
a bag made of clear plastic
a bag made of aluminum foil
Two students are rolling marbles down a ramp and measuring how long they take to teach the bottom. They each have a bag containing marbles made of different materials that are also different sizes and colors. What can the students do to be sure their results can be replicated?
Make sure that they both use the same color marbles.
Make sure that they test the marbles at different times.
Be sure to sue marbles of the same size and material each time.
Be sure they guess how long the marbles will take to go down the ramp.
Lucas theorizes that changing the slope of a ramp will affect how far a toy car travels down the ramp. To test this theory, Lucas builds two ramps with different slopes. Lucas sends a toy car down each ramp one time. After measuring the distance watch toy car traveled, Lucas concludes that the sleeper slope caused the toy car to travel further. What would be the benefit of Lucas conducting multiple trials on each ramp?
Lucas would replicate the study.
Lucas would improve the validity of the results
Lucas would prove the hypothesis was correct.
Lucas would increase the accuracy of his measurements.
A scientist has just finished an experiment that produced new evidence showing how DNA works. She wants to ensure that the evidence is accepted by other scientists. Which action will MOST LIKELY prevent the evidence from being accepted?
Other scientists cannot replicate the results of her experiment in a similar lab.
Other scientists publish a similar experiment that supports the results of her experiment.
The scientist repeats her experiment ten more times and gets similar results.
The scientist compares her experiment to another experiment showing how hers is different.
How many meters were traveled between B & C?
0 meters
200 meters
800 meters
50 meters
The graph represents the motion of a boat traveling at a constant speed. If the boat continues traveling at the same speed, how far will it travel in 6 seconds?
8 meters
32 meters
40 meters
48 meters
Stanley watches his cat run across his living room. He obtains the following data on the graph. How would the graph be different if the cat walked across the living room?
the slope of the line would be steeper
the line would be curved
the line would be horizontal
the slope of the line would be less steep
The top three Chihuahuas in the annual Cinco de Mayo Chihuahua race were Lila, Rosalita, and Mandy. Using the graph below, what is the correct order of fastest to slowest?
Lila, Mandy, Rosalita
Mamdy, Lila, Rosalita
Rosalita, Lila, Mandy
Rosalita, Mandy, Lila
Jimmy rode his bicycle away from his house at a constant speed. Which of the following graphs best shows the relationship between the distance traveled and the time spent driving?
A toy car sits motionless at the top of a ramp. What will happen to the car if a balanced force acts upon it?
it will stay in place
it will roll backward
it will fall off the ramp
it will roll down the ramp
During a game of soccer, Jenny kicks a ball straight down the field. Her teammate Craig is waiting close by. He does not allow the call to stop, and kicks the ball straight down the field in the same direction. How does the ball move immediately after Craig kicks it?
it moves less rapidly in the same direction
it moves more rapidly in the opposite direction
it moves more rapidly in the same direction
it moves less rapidly in the opposite direction
A ball sits in the middle of the table without moving. What must happen for the ball to start moving?
The forces acting on the ball must be balanced.
The net force on the call must be zero.
The forces acting on the call must be unbalanced.
the ball must have overcome the force of gravity.
Which of these has an unbalanced force?
A book sitting undisturbed on a desk
a child standing in a line that is not moving
a meteoroid moving at a constant speed and direction through outer space
a ball that is slowing down as it rolls on the ground along a straight line
Look at the image. What would be the result of the two people pushing on the box?
The box will not move.
The box will move 5N to the left.
The box will move 15 N to the left.
The box will move 2N to the right.
Which of the following situations represents an unbalanced force?
Ashton stares at his textbook that is sitting on his desk.
Lexi watches a car maintaining a speed of 45 miles per hour.
Tori throws a paper airplane and it glides across the room.
Orion looks at his shiny penny resting at the bottom of a fountain.
The wind transfers energy to turbines as it turns the turbine blade. What type of energy do the turbine blades have while spinning?
chemical energy
potential energy
kinetic energy
light energy
Jerry tosses a ball into the air and watches it fall back to Earth. When does the ball have the greatest amount of potential energy?
at its highest point
as it leaves Jerry's hand
just before it hits the ground
halfway up top its highest point
Samantha wanted to ride a rollercoaster. The rollercoaster is shown in the picture. Which statement BEST describes the energy changes taking place as the rollercoaster moves from point B to C?
Both potential energy and kinetic energy increase.
Both potential energy and kinetic energy decrease.
Kinetic energy decreases and potential energy increases.
Potential energy decreases and kinetic energy increases.
Juan's room is suddenly dark when a light bulb burns out. He attempts to replace the old bulb with a new one but realizes that the old bulb is too hot to touch. Juan waits 10 minutes and then changes the bulb when it is completely cool. What happened to the heat in the bulb during the 10 minutes he waited?
The heat was completely destroyed.
The heat was stored as chemical energy.
The heat was transformed into electricity.
The heat was transferred to the air around it.
Metal springs are good examples of stored force and opposing force. If a force pushes a spring downward, compressing it tightly, what direction of force would the spring MOST LIKELY have in return?
it would twist
it would push upward
it would compress itself more tightly
it would push outward to either side
What is the best scientific definition of the term "force"?
A force is a push or pull that changes the motion of an object.
A force is an event that changes the appearance of an object.
A force is any object that can be changed by another object,
A force changes an object into another object.
Which phrase BEST describes a gravitational force?
a force that pulls objects toward each other
a force that can make objects both attract and repel each other
a force that spins objects
a force that acts only when two objects are in contact with each other
Curtis conducts an investigation to determine which brand of paper towels is most absorbent. He records his findings in the table. What is the test variable (independent variable) and outcome (dependent variable) in this investigation?
Test variable: brand of paper towels
Outcome: amount of water absorbed
Test variable: the liquid used
Outcome: amount of water absorbed
Test variable: the amount of water absorbed
Outcome: brand of paper towels
Test variable: the time the towels absorbed water
Outcome: brand of paper towels.
Simran is learning how to design an experiment to test a hypothesis. What is the most likely outcome of testing a hypotheses in controlled conditions?
avoiding dangerous conditions during experimentation
limiting the variables that that can affect the experiment
making the experiment easier to conduct
keeping the experimental area sterile
Caleb wants to know how salt affects the boiling point of water. What is the BEST way for Caleb to collect data to answer this question?
Bring 1 liter of water to a boil, then add 1 gram of salt and observe any changes.
Add 1 gram of salt to 1 liter of water and time how long it takes for the water to boil.
Add 1 gram of salt to 1 liter of water and leave a second liter free of salt; time how long it takes for each to boil.
Add 1 gram of salt to 1 liter of water and 10 grams of salt to a second liter; time how long it takes for each to boil.
Scientific investigations involve the collection of empirical evidence. Which of these statements is NOT true about empirical evidence?
Empirical evidence is influenced by personal feelings.
Empirical evidence can be collected by many scientists.
Empirical evidence is measurable.
Empirical evidence includes descriptive observations.
Scientific investigations involve the collection of empirical evidence. Which of the following is NOT as example of empirical evidence that could be gathered to investigate the idea that consuming more calories than you use results in weight gain?
measurement data of people's calorie intake and weight
interviewing people about changes in weight
measuring people's changes in weight
determining the caloric values of foods
Owen is reading a study about a mysterious medical syndrome in adults. He sees the chart below, which shows how test subjects and control group subjects scored for particular symptoms using a scale from 1 to 10, with 10 being the highest experience of a symptom. He knows that control subjects are a group of people that are not experiencing the syndrome. What is the importance of the control subjects?
You can use the scores of control subjects to figure out which symptoms seem to be associated with the disorder and which do not.
You can use the scores of control subjects to figure out that some of the control subjects also have the syndrome.
You can use the score of control subjects to figure out the exact disease that the test subjects are suffering from.
You can use the scores of the control subjects to figure out that the test subjects are exaggerating the symptoms.
The collection of evidence in support of scientific theories is an ongoing process. What effect will contradictory evidence have on a scientific theory?
The scientific theory will be modified to account for the new evidence.
The scientific theory will be discarded in light of the new evidence , and a new theory will take its place.
The scientific theory will not change, since the evidence was collected after the theory had been formulated.
The scientific theory will be discarded, with no replacement, and the line of investigation abandoned altogether.
Sir Isaac Newton developed the theory of universal gravitation. Albert Einstein studied Newton's theory and later developed his theory of general relativity, which is considered more accurate. Which statement BEST describes the relationship between Newton's and Einstein's theories?
Both theories are incorrect.
Newton is responsible for Einstein's theory.
Einstein's theory built upon Newton's theory.
Newton was not as good a scientist as Einstein.
An asteroid is flying through the space at a constant speed? Which statement below correctly describes the motion of the asteroid?
Each day, the asteroid travels farther than it did the previous day.
Each day, the asteroid travels the same distance it did the previous day.
Each day, the asteroid travels less than it did the previous day.
Each day, the asteroid travels the opposite direction of the previous day.
The graph below shows the motion of three joggers. Which of the following statements correctly describes the relationship between the joggers ?
Jogger Y is moving at a faster rate than jogger X.
Jogger Z is farther ahead than joggers X & Y.
Jogger X is moving at a faster rate than joggers Y & Z.
Jogger Z is slowing down while jogger X is moving at a constant speed.
Look closely at chart which shows mechanical energy of a car on a roller coaster at four different locations. Notice that the total energy, or mechanical energy, of the car on the rollercoaster is always the same. What explains this observation?
Kinetic energy is created during a rollercoaster ride.
Kinetic energy and potential energy change but energy is neither created nor destroyed during the rollercoaster ride.
Potential energy increases but kinetic energy stays the same during the rollercoaster ride.
Potential energy is destroyed during the rollercoaster ride.
Energy can be transformed from one type to another. In which of the following situations is kinetic energy transformed into potential energy?
when a boulder rolls down a mountain
when a water tank ruptures and water flows out
when a tree branch falls toward the ground
when a ball is thrown straight up into the air
The drawing below shows three different positions of a skier as she descends a snow-packed hill. Which of the following statements is correct?
At point A, the skier is experiencing no proaction, therefore all of her energy is kinetic.
The skier at point C is moving the fastest, and therefore has the most potential energy.
At point B, the skier's kinetic energy is higher than at point C.
Friction is reducing the amount of kinetic energy the skier has.
Which statement below explains the possibility for a distance versus-time graph to be a vertical line?
It is not possible.
When an object is moving at a constant speed.
When an object is not moving.
When an object is moving 2 meters per second.
Students place soil from the playground on a stream table. They sprinkle water on the upper end and observe the results. The students repeat the same process using different soil from other places around the school campus.
Which questions are the students trying to test?
Does the stream table slope affect soil erosion?
Does the soil type affect soil erosion?
Does stream table length affect soil erosion?
Does volume of water affect soil erosion?
A student examines the effect of the number of D batteries in an electrical circuit on the brightness of a light bulb. In the experiment, circuits were built with 1, 2, 3, and 4 batteries. For each test, the brightness of the light bulb was measured using a light meter.
Which factor should the student keep constant?
the type of batteries
the number of D batteries
the brightness of the light bulb
the data collected from the light meter
How do replication and repeated trials compare?
During both processes, the original investigator does the experiment again.
During both process, a different investigator does the experiment again.
During replication, a different investigator does the experiment again. During repeated trials, the original investigator does the experiment again.
During replication, the original investigator does the experiment again. During repeated trials, a different investigator does the experiment again.
Scientists study changes in beaches, marshes, and other coastal areas. The movement of water causes coastal areas to change.
Which of these is NOT a source of evidence for studying coastal areas.
data of waves and tides
information on the size and shape of beaches
maps of hurricane paths in the past 10 years
surveys that ask peoples their opinions of beaches
Cicadas are insects that spend most of their lives developing underground, then emerge after a period of time. As part of their life cycle, cicadas molt and leave behind a shell, or exoskeleton, on tree trunks and shrubs.
How could a student use empirical evidence to determine the population of cicadas in the area?
The student could watch a video of insects in the wild.
The student could take a poll to find how many people have heard about cicadas.
The student could count the number of cicada shells left behind over a period of time.
The student could predict how many cicada shells would be collected in a particular forest area.
Which of the following is an example of pseudoscience?
Studying how the Moon creates tides.
Studying how acid rain forms.
Studying whether your birth month affects your personality.
Studying whether beak size determines the diet of certain birds.
A student keeps a science journal and records the conditions of her classroom. Every day when she enters the room, she writes down an observation under one of four observation categories.
Which of the following four observation categories are based on empirical evidence in the forms of quantitative data?
the number of students present
whether the room feels warm or cold to her
the color of the teacher's tie
whether she thinks the room is neat or messy
Some models are better suited to represent a certain system than others. Which is NOT a factor in evaluating the usefulness of a model?
simple and easy to understand
fits the data and explains the phenomenon
allows researchers to make accurate predictions
the number of researchers using the same model
John Dalton's atomic theory stated that all atoms of a given element are identical in mass and properties. More than one hundred years later, scientists learned that atoms of the same element could have different masses.
What does this illustrate about scientific theories?
Scientific theories are modified over time as new evidence is discovered.
Scientific theories are only guesses, which are by definition inaccurate.
Scientific theories are only guesses, which are by definition inaccurate.
Theories that have been revised are completely correct and will not be changed in the future.
The school board for a city in Florida wants to take steps to make school lunches healthier and more appetizing to students. What is the BEST way for scientists to help the school board make decisions about this issue?
Scientists could research which foods are available in recyclable containers.
Scientists could research which foods are least expensive and easy to prepare.
Scientists could research which foods are nutritious and popular among students.
Scientists could research which foods are most popular among parents of students.
Remember that speed= distance / time. If an object is moving at a constant speed of 3 meters/second, how far will this object travel in 4 seconds?
6 meters
9 meters
12 meters
15 meters
A marine biologist observed the swimming speed of five different types of fish as shown in the chart below.
What measurements did the marine biologist take to correctly calculate the speed of these fish?
time and density
volume and mass
distance and time
distance and density
The graph represents the motion of a boat traveling at a constant speed.
If the boat continues traveling at the same speed, how far will it travel in 6 seconds?
8 meters
32 meters
40 meters
48 meters
Stanley watches his cat run across his living room. He obtains the following data represented by the graph.
How would the graph be different if the cat walked across the living room?
the slope of the line would be steeper
the line would be curved
the line would be horizontal
the slope of the line would be less steep.
Force can change the speed or direction of motion of an object, or sometimes both. The illustration below shows a game of tug-of-war between two teams of students.
The team of students on the right won the contest. What force helped the winning team?
a balanced force
an electrical force
an unbalanced force
gravitational force
Which of these has an unbalanced force?
a book sitting undisturbed on a desk
a child standing in a line that is not moving
a meteoroid moving at a constant speed and direction through outer space
A ball that is slowing down as it rolls on the ground along a straight line
A ball sits in the middle of a table without moving. What must happen for the ball to start moving?
The forces acting on the ball must be balanced.
The net force on the ball must be zero.
The forces acting on the ball must be unbalanced.
The ball must have to overcome the force of gravity.
The drawing shows the cars of a roller coaster racing down the track.
How does the Law of Conservation of Energy best explain the energy of the cars on the track?
The kinetic energy of the cars is being transformed into potential energy.
The cars have potential energy, but no kinetic energy.
The potential energy of the cars is being transformed into kinetic energy.
The cars have kinetic energy, but no potential energy.
The law of conservation of energy describes a key characteristic of energy and the way it is transformed within systems. Which expression BEST demonstrates the law of conservation of energy?
gravitational potential energy = weight x height
density = mass/volume
force = mass x acceleration
mechanical energy = potential + kinetic
Jerry tosses a ball into the air and watches it fall back to Earth.
When does the ball have the greatest amount of potential energy?
at its highest point
as it leaves Jerry's hand
Just before it hits the ground
halfway up to its highest point
Some space missions are carried out with no human crew members on board. What is the reason why some space missions have no human crew?
Some parts of space have too much oxygen for human crews.
Some parts of space are not interesting to humans.
There are many parts of space to which humans have already traveled; they do not need to go again.
Distances in space are so vast, some missions take too long to include humans.
