Unit 1: Matter
Unit 2: Energy
Unit 3: Waves
Unit 4: Force
Unit 5: Motion
100
What is the location AND charge of the subatomic particles of an atom?
100
A student is doing a ball-drop experiment. She notices that the higher she drops the ball, the higher it bounces. Why does this happen?
When the ball is dropped from a higher height, it has more potential energy. As it falls, that energy turns into kinetic energy. When the ball hits the ground, the law of conservation of energy says that energy is not lost, it changes form. So the more energy the ball starts with, the more energy it has to bounce back up, which makes it bounce higher.
100
How are electromagnetic and mechanical waves different?
Mechanical waves can only travel through a medium like a solid, liquid, or gas.
Electromagnetic waves can travel through a complete vacuum like space.
100
A student claims that the gravitational force between two objects depends upon the mass of the objects and the distance between them. Which argument best supports the student's claim?
A. If the distance between two objects increases, the gravitational force between the objects will decrease.
B. If the distance between two objects decreases, the gravitational force between the objects will disappear.
C. If the distance between two objects increases, the gravitational force between the objects will increase.
A. If the distance between two objects increases, the gravitational force between the objects will decrease.
100
The picture shows two teams playing tug-of-war.
If the force of each team is balanced by the other, then
A. both teams will fall to the ground.
B. both teams will move to the right.
C. both teams will move to the left.
D. both teams will remain in place.
D. both teams will remain in place.
200
Oxygen and sulfur are in the same group or family on the periodic table, what can you infer about them?
They have similar properties.
200
Identify the types of energy below:
200
The diagram shows the electromagnetic spectrum. Which electromagnetic wave has the most energy?
Gamma rays have the most energy because they have the highest frequency and shortest wavelength.
200
pictures show four electrically charged items.
If a student rubs a glass rod with a piece of silk, giving the rod a positive charge, which of the items will the rod attract?
Balloon 2 and Plastic sheet 1
200
The graph shows a bicycle rider's motion during the first portion of a race.
What conclusion can be drawn about the rider's motion?
A. The rider maintained a constant speed during the time period between 0 and 10 seconds.
B. The rider did not move during the time period between 10 and 15 seconds.
C. The rider rode downhill during the time period between 15 and 20 seconds.
D. The rider slowed down during the time period between 15 and 20 seconds.
D. The rider slowed down during the time period between 15 and 20 seconds.
300
Is trail mix a homogenous or heterogenous mixture? Why?
Trail mix is a heterogeneous mixture because its components, such as candy, seeds, and dried fruits, are not uniformly distributed and remain distinct and visible
300
When a solar panel charges, what energy transformation occurs?
Light (or radiant) energy --> Electrical energy
300
Why does a red shirt appear red?
The shirt absorbs all other colors but reflects red.
300
When combing one's hair, the comb becomes positively charged. What happens to the hair being combed?
A. It stays uncharged.
B. It becomes positively charged.
C. It becomes negatively charged.
D. It loses electrons.
C. It becomes negatively charged.
300
The diagram shows two girls pushing on a box with equal and opposite forces.
Describe the force required to move the box to the right.
The forces must be unbalanced with the force from the left greater than the force from the right.
The force from the left must be greater than the force from the right, creating an unbalanced net force.
400
Is cooking an egg a chemical or physical change, and why?
A chemical change because new substances are formed and the change cannot be reversed.
400
It is a hot summer day, and Miguel wants to cool off. He decides to make a root beer float. He pours root beer into a mug and adds a scoop of vanilla ice cream. What thermal energy transfer occurs?
Thermal energy moves from the root beer (warmer object) to the ice cream (cooler object) by conduction.
400
Why are convex lenses commonly used in magnifying glasses?
Convex lenses bring light rays together to make objects appear larger and easier to see.
400
A student creates an electromagnet and holds it near two paper clips.
Paper clip Y is not attracted to the magnet. Which step should the student take to attract it?
The student should move the magnet closer to the paper clip.
400
The graph shows the motion of a horse during the first portion of a race.
Based on the information in the graph, which statement is true?
A. The horse maintained a constant acceleration during this portion of the race.
B. The horse maintained a constant velocity during this portion of the race.
C. The horse increased its acceleration during this portion of the race.
D. The horse decreased its velocity during this portion of the race.
A. The horse maintained a constant acceleration during this portion of the race.
500
Which metal has the highest density?
Copper has the highest density because it has the most mass per given volume.
268.8g / 30 cm3= 8.96 g/cm3
500
A student winds up a toy car, sets it down, and watches it speed across the floor.
Explain the energy transformations from winding the toy to its movement.
Mechanical energy--> potential energy--> kinetic energy
Winding the toy: Mechanical energy → Elastic potential energy (stored in spring)
When released: Elastic potential energy → Kinetic energy
500
What is the relationship between wavelength and frequency?
As wavelength increases, frequency decreases.
As wavelength, decreases, frequency increases.
Long wavelengths= low frequency= low energy
Short wavelengths= high frequency= high energy.
500
A student claims that gravitational fields exist between objects that are not in contact with each other. She creates a diagram of two figures. The width of the arrows in Figure A and Figure B represent the strength of the gravitational attraction between two objects.
The student claims the gravitational force is greater between the objects in Figure A. What argument best supports her claim?
The distance between the objects in Figure A is shorter than the distance between the objects in Figure B.
The shorter distance between the objects in Figure A results in a greater gravitational force between the objects than in Figure B.
500
The graph shows the motion of three cars.
Which statement best describes the motion of the cars?
A. Cars 1 and 3 have constant speeds, whereas Car 2 has a variable speed.
B. Cars 1 and 3 have variable speeds, whereas Car 2 has a constant speed.
C. All three of the cars have variable speeds.
D. All three of the cars have constant speeds.
B. Cars 1 and 3 have variable speeds, whereas Car 2 has a constant speed.