Forces
Energy
Distance v Time Graphs
WED & Landforms
Nature of Science
100
What happens when an unbalanced force acts on an object?
The motion of the object changes
100
What is the Law of Conservation of Energy?
Energy cannot be created nor destroyed, only changed forms.
100
Describe the motion in the following graph.
Moving at a constant speed
100
Through freezing and thawing, a boulder is broken into smaller pieces. What is this an example of?
physical weathering
100
What is replication? What is repetition? Which one validates an experiment?
Replication - Copy another scientist's experiment and get similar results. It validates experiments
Repetition - Repeat yourself in the form of trials
200
What team will win the following tug of war game?
Neither; this is a balanced force. Both teams are equal.
200
Name an example of kinetic energy converting into potential energy
A roller coaster car moving toward the top of the next hill;
Throwing a ball straight into the air
200
Look at the following graph. What object has the greatest speed? What object is the slowest?
A is the fastest
D is the slowest
200
Acid rain is a form of pollution. Acid rain can cause buildings and other structures made of limestone or marble to weaken and break apart. What process does this change represent?
Chemical Weathering
200
What is the main difference between investigation and experiment?
Investigation has no variables and experiment has variables AND a complete scientific method
300
Calculate the Net Force of the following and identify whether or not it is balanced or unbalanced.
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.
Unbalanced; 6N to the right
300
Name an example of potential energy turning into kinetic energy
A ball rolling down a hill; a leaf falling
300
Describe the motion of each section:
A - speeding up
B- staying still (stationary)
C - Slowing down
D - Staying sill
300
Which of the following best explains how destructive forces continually tear down and build up Florida’s coastline?
A. Gravity pulls and pushes sediment and water, shaping the coastline.
B. Weathering, erosion and deposition by wind and water cause shaping of the coastlines.
C. Deposition and storage of sediment shapes the coastline of Florida.
D. Waves are the only factor that push sediment, shaping and building the coastlines.
B. Weathering, erosion and deposition by wind and water cause shaping of the coastlines.
300
Tyler is conducting an experiment in order to determine the effect that fertilizer A and fertilizer B have on St. Augustine grass. He conducts multiple trials and concludes that St. Augustine grass grows faster and thicker with the application of fertilizer A. How could Tyler make sure his results were reliable and valid?
Another scientist could do the same experiment and get similar results
(Replication)
400
Calculate the Net Force of the following problems and state what direction, if anything, it is moving.
1. 10N- 10N = 0N, Not Moving; Balanced
2. 10N + 10N = 20N, Moving 20N to Right, Unbalanced
3. 10N - 8N = 12N, Moving 12N to Left; Unbalanced.
400
Why does kinetic and potential energy change, but mechanical energy always stays the same?
KE and PE continuously convert to and from each other, while the total energy (mechanical energy) stays the same
400
Draw a graph of the following scenario:
A duck named Quackers spotted a lake. He ran with increasing speed to the lake until he jumped in. Quackers stayed at the lake for a bit before getting out. After all the fun, he was tired and waddled slowly back, getting more sluggish as he walked. Then he was finally back home.
A- running to lake
B- in lake
C- going back home
D- at home
400
All of the following describe a way glacier melt can affect the coast except for one. Which of the following responses is incorrect?
A. An increase in sea level causes an increase in flooding.
B. An increase in sea level causes more erosion of beaches and coastlines.
C. An increase in sea levels causes a loss of land.
D. An increase in sea levels causes additional coastline to form.
D. An increase in sea levels causes additional coastline to form
400
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? How do you know?
Javier is because he has variables and is following the scientific method
500
Calculate the Net Force and the direction of movement, if there is any.
2N + 4N = 6N
6N - 5N = 1N
1N to right; Unbalanced
500
Describe the Potential Energy, Kinetic Energy, & Mechanical Energy at points X and points Z.
X- Highest PE, Lowest KE, Same ME
Z - Highest KE, Lowest PE, Same ME
500
Is it possible to have a vertical line on a distance v time graph? Why or Why not?
It is not possible, because time can’t stand still while the object moves.
500
Scientists notice that a river delta has been gradually getting larger and shallower over the past 50 years. What is the most likely reason for this change?
A. The river current increases and there is no change in the amount of sediment.
B. Sediment is deposited as the river slows down.
C. The river current slows down and there is no change in the amount of sediment.
D. Sediment is deposited as the river speeds up.
B. Sediment is deposited as the river slows down.
500
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? (6.N.1.3)
A. Qualitative data cannot be collected from photos.
B. Variables, such as the weather, cannot be controlled.
C. The exact amount of erosion cannot be measured.
D. The primary cause of erosion cannot be identified.
C. The exact amount of erosion cannot be measured.