Questions and answers by

bnat

Questions (31)

An electric fan is plugged into an outlet and the circuit completed, making the fan blades spin. Which of the following
1. 1 answer
2. 21 views
Kyra and Violet are camping with their family. They are roasting marshmallows over a campfire. What types of energy are released
1. 1 answer
2. 21 views
The table shows the speed and height over time of a ball that starts at rest, then is dropped from the top of a building, which
1. 1 answer
2. 8 views
How can the law of conservation of mass apply to a burning log, if all that remains of it is ash?A. The ash has the same mass as
1. 1 answer
2. 11 views
Shanice and Jalen are doing an experiment to investigate the law of conservation of mass. They heat a solid in an open container
1. 1 answer
2. 4 views
Directions: The models Q, R, S, and T below show different kinds of matter. Use the models to answer any questions that follow.i
1. 1 answer
2. 5 views
Select two events that represent chemical changes that occur as a candle burns.A. Heat and light are produced. B. The heat melts
1. 1 answer
2. 8 views
Liam explores the decomposition of water. He attaches a battery to the ends of two pencils sharpened at both ends, and places
1. 1 answer
2. 4 views
The picture shows the wavelength of music coming from Malik's radio.image If Malik turns the volume of the radio down, what will
1. 1 answer
2. 7 views
Look at the graph below.image Which sound has waves with the greatest amplitude? A. jet takeoff B. light whisper C. noisy
1. 1 answer
2. 16 views
The diagram shows the identification of two types of waves.image Which question, represented by X on the diagram, helps to
1. 1 answer
2. 17 views
A student is investigating two types of waves.Which question can the student ask to determine whether a wave is electromagnetic?
1. 1 answer
2. 8 views
A student drops a rock in a calm pond. The student observes ripples spreading away from the splash across the surface of the
1. 1 answer
2. 11 views
The picture below shows a beaker with oil and water.image Which beaker shows what a light ray will do that travels from the air
1. 1 answer
2. 5 views
The picture below shows the path of a sound wave as it moves from left to right.image What has taken place at X to change the
1. 1 answer
2. 21 views
A student views a table of the speed of sound waves in three different materials.Material Speed (meters/second) Density (kg/m3)
1. 1 answer
2. 13 views
A teacher took the picture below of a pond near the school on a cool, still autumn morning.image The teacher showed the students
1. 1 answer
2. 5 views
A student is making a model of incoming sound waves' interactions with a surface.Move one interaction term into each box to
1. 1 answer
2. 5 views
A student wants to develop a model showing why a quarter at the bottom of a pool of water is never where you expect it to be.Whi
1. 1 answer
2. 4 views
Many devices use the electromagnetic spectrum, including radios, cell phones, and medical equipment.When designing a device
1. 1 answer
2. 3 views
A scientist is designing a device that will kill harmful cells in the human body using high-energy waves.Which type of wave
1. 1 answer
2. 19 views
The diagram below is of the electromagnetic spectrum.Image Which feature best distinguishes one form of electromagnetic energy
1. 1 answer
2. 15 views
The diagram shows the wavelengths of the electromagnetic spectrum.image Which statement best compares a gamma ray to a radio
1. 1 answer
2. 10 views
Students are planning and carrying out an investigation to demonstrate how to induce a charge on an insulator and its effect on
1. 1 answer
2. 8 views
You are planning an investigation to demonstrate the concept of induction using a charged balloon and a neutral metal can.Which
1. 1 answer
2. 7 views
The pictures show four electrically charged items.image Select all of the items a glass rod would attract if it were rubbed with
1. 1 answer
2. 6 views
Read the passage and answer the following question(s).Passage 12472 Directions: Read the passage about the factors that affect
1. 1 answer
2. 5 views
Read the passage about Brian.Brian made an electromagnet in his science class. He spread out several paper clips, all made of
1. 1 answer
2. 7 views
A student is creating an electromagnet for an investigation.Which feature of the electromagnet will least influence the magnetic
1. 1 answer
2. 11 views
In a laboratory experiment, students use an electroscope to investigate the presence of electric fields. The electroscope
1. 1 answer
2. 7 views
A student claims that invisible fields exist between objects that are not in contact.Which of the arguments best support her
1. 1 answer
2. 7 views