WorksheetsCase 21 Test Questions
Total questions: 14
Worksheet time: 14mins
All objects fall at the same rate. Which must be true for objects of different masses to fall at the same rate?
Gravity has a stronger force on an object with a large mass.
Gravity has a stronger force on an object with a small mass.
An object with a large mass moves through the air easier.
An object with a small mass moves through the air easier.
A student places four blocks of different masses on a balance beam. The student claims that the forces acting on the blocks are balanced. Which statement supports the claim?
Friction pushes left on the blocks with the same force as the balance beam pushes right.
Gravity pulls down on the blocks with the same force as the balance beam pushes up.
The balance beam has the same mass as all the blocks combined.
The balance beam moves when the student places the blocks on it.
A marble is placed on a ramp at two different positions and released. The starting position and final position of the marble are recorded in the diagram as observation 1 and 2. What will most likely be the final position of the marble in observation 3?
The paragraphs explain two communication devices and how they work. How did the use of radio waves improve the telephone?
A telephone is a device that was built in 1887 and is used by people to talk to others who are not near them. It changes a person’s voice into electronic signals, which are sent through cables to the receiving end. The telephone on the receiving end collects the signals and converts them back into sound.
A cell phone is a device that uses radio waves to transfer sound over long distances, helping humans to communicate. Because it uses radio waves to transmit and does not require a cable, it can be carried in a person’s pocket.
Sending sound signals is less expensive.
Sending sound signals is faster with radio waves.
A person can talk to more people at once from home.
A person can travel with a communication device.
Two students state what they believe will happen when a ball is dropped from a bridge over water. Which student is correct, and why?
Student A is correct because gravity pulls toward the center of Earth.
Student A is correct because gravity pulls toward the edge of the bridge.
Student B is correct because gravity causes Earth to rotate. D
Student B is correct because gravity pushes the ball toward the bridge.
A student makes a bell using a metal disc and a metal ball tied with thread attached to the ceiling. The ball in Image P takes 3 seconds to strike the metal disc. The ball in Image Q takes 5 seconds to strike the metal disc.
If the length of thread is increased to 40 cm, how much time will it likely take for the ball to strike the metal disc?
2 seconds
3 seconds
5 seconds
7 seconds
A student ties a ball to a rope and moves the ball around in a circle, as shown. What will happen when the student increases the force with which the ball is moved?
The ball will spin in a larger circle.
The ball will change size and shape.
The ball will move higher from the ground.
The ball will move in the same path at a faster speed.
Earth’s gravity has an effect on the objects shown. On which object will Earth’s gravity have the greatest effect?
Earth’s gravity will affect the Sun more because it is a star that is far from Earth.
Earth’s gravity will affect the Moon more because it is a rock that is bigger than Earth.
Earth’s gravity will affect a person more because the person is close to the ground
Earth’s gravity will affect a leaf more because the leaf is in a tree far from the ground.
Which statement best describes Earth’s gravity?
Gravity is a force that pulls all objects down to Earth’s surface.
Gravity is the result of an object pushing on Earth’s surface.
Gravity is the motion of Earth that causes objects to fall to Earth’s surface.
Gravity is a force that pushes objects down to Earth’s surface.
A student makes a boat with cardboard, paper clips, and plastic straws. The student wants to improve the ability of the boat to float. The table shows the amounts of time different materials take to sink in water. Which change will most likely help improve the ability of the boat to float?
One side of a spring is attached to the ceiling. The other side is attached to a box with a mass of 20 grams, as shown. When the box is dropped from the ceiling, the spring causes the box to move down and up repeatedly. If the mass of the box is increased to 60 grams, how will the movement of the spring change?
The spring will move down and up quicker.
The spring will stretch farther down before moving back up.
The spring will move side to side slowly.
The spring will stretch less before moving back up.
A student tests the impact of different forces on the speed of a toy car while it moves to the right. The student records the forces applied to the moving car and the results in a table. Which conclusion do the results best support?
The speed is fastest when a balanced force is applied in the direction of motion.
The speed is fastest when a balanced force is applied in the direction opposite the motion.
The speed is fastest when an unbalanced force is applied in the direction of motion.
The speed is fastest when an unbalanced force is applied in the direction opposite the motion.
A book is placed on a flat surface. Which application of forces to the book can a student use to study balanced forces on the book?
an equal force applied to both sides, left and right
a small force from only one side, either left or right
a small force from the left and a large force from the right
a large force from the left and a small force from the right
A student attaches a ball to a string and hangs the string from the ceiling. The student pulls the ball to the left, releases the ball, and measures its highest point on the right. The student repeats the experiment with a different height, as shown.
If the student releases the ball from a height of 25 cm on the left, to what height on the right will the ball most likely rise?
15 cm
23 cm
29 cm
32 cm
