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Which of the following is an example of diffraction?
a Light bending as it enters a prism. b Sound through a wall being muffled.
1 answer
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Anonymous ;)
102 views
Lightning contains gamma rays. Based on the position of gamma rays in the electromagnetic spectrum, does lightning have more or
1 answer
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Anonymous ;)
212 views
Waves have energy that causes particles in matter to vibrate. So, it stands to reason that(1 point)
Responses the higher the
1 answer
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199 views
Waves have energy that causes particles in matter to vibrate. So, it stands to reason that(1 point)
Responses the higher the
1 answer
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Anonymous ;)
263 views
What do Argo floats measure in the world's ocean currents? Select the two correct answers.(1 point)
carbon dioxide rainfall
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boooooohooooooo
167 views
What is the main principle behind the law of conservation of matter?
A. Mass does not change phase during a reaction. B. The
1 answer
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Anonymous ;)
96 views
Betsy depends on her electric alarm clock every morning to get up in time for school. What energy transformation happens in
1 answer
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Anonymous ;)
291 views
If Janie puts her hand on a cold metal doorknob, how will thermal energy move?
A. Cold moves from the doorknob to her hand. B.
1 answer
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Anonymous ;)
158 views
A student is investigating inertia and acceleration. The data the student collects is shown in the table.
Assuming the force
4 answers
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Anonymous ;)
336 views
A water rocket uses an amount of water and pressurized air to send a plastic rocket several feet into the air. As the water and
1 answer
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Anonymous ;)
119 views
The diagram shows two girls pushing on a box with equal and opposite forces.
Which statement best describes the forces required
4 answers
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Anonymous ;)
257 views
Which question would best identify a wave as being electromagnetic?
A. Does it travel through matter? B. Does it travel through a
2 answers
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Anonymous ;)
206 views
The diagram below shows a portion of the electromagnetic spectrum.
image dcf936aaba8844beb1c3e90816d403e6 Which of the following
2 answers
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Anonymous ;)
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Select the correct words to complete the sentences.
In order to see an object, light must be by the object. The light is then
1 answer
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Anonymous ;)
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The pictures show four wavelengths of sound.
Which line shows the lowest frequency? A. W B. X C. Y D. Z
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Anonymous ;)
62 views
A student holds two positively charged balloons near each other. She claims that magnetic forces exist between the balloons.
1 answer
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Anonymous ;)
181 views
Gillian is investigating the distribution of charge in objects using friction. Gillian gently rubs a rubber balloon on the fur
1 answer
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Anonymous ;)
148 views
Ethan makes the table below to record his observations when mixing baking soda and vinegar in a beaker.
Ethan claims that a
1 answer
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Anonymous ;)
171 views
Which table correctly matches each particle with its location and charge?
A. Particle Location Charge proton in the nucleus
1 answer
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Anonymous ;)
190 views
The diagram shows a baseball being thrown into the air.
Which graph best represents how the kinetic energy (KE) and potential
4 answers
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Anonymous ;)
338 views
Rosa uses a spring scale to pull a cart along a track for 2 meters. The spring scale shows the force exerted on the cart while
2 answers
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Anonymous ;)
162 views
The graph below shows the phase change for H2O.
Which statement best describes what is occurring at segment C? a Energy and
1 answer
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Anonymous ;)
172 views
Reggie puts a beaker of ice and water on a hot plate, and the ice slowly begins to melt as shown in diagram below. After a few
1 answer
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Anonymous ;)
190 views
When white light strikes this object, the light is completely absorbed, with none of it transmitted or reflected. Which type of
4 answers
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Anonymous ;)
234 views
Find the value of x that makes the triangle a right triangle.
A right triangle with a hypotenuse of 20 units , height of x units
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Anonymous ;)
63 views
A stack of newspapers is burned completely to ash in a laboratory. How does the resulting mass relate to the initial mass of the
2 answers
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Anonymous ;)
162 views
What chemical change occurs as a candle burns?
a The candle wax turns liquid as it burns. b Heat and light are produced. c The
2 answers
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Anonymous ;)
130 views
On a guitar, the longest string vibrates slowly, and the shortest string vibrates very quickly. What conclusion can be made
1 answer
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Anonymous ;)
118 views
is rhenium a pure substance or mixture?
1 answer
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EEEEEEEEEEEEEEEEEEEEEEEEEEEEE
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According to the information in the table, which of the following boys would hear a rock fall off of a cliff a kilometer away?
Re
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Anonymous ;)
132 views
The chemical equation shown below is not balanced (it does not follow the Law of Conservation of Matter).
Ca + 2HCl --> CaCl2 + H
1 answer
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178 views
Does the equation below follow the Law of Conservation of Matter?
2As + 6NaOH --> 2Na3AsO3 + NH2 a Yes, because the reactants
1 answer
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Anonymous ;)
140 views
Which two objects are exerting more force on each other?
a A b B c They are exerting the same amount of force. d There is not
1 answer
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203 views
Objects fall at different rates due to:
a mass b weight c air resistance d inertia
2 answers
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127 views
A falling object reaches terminal velocity once its speed
a remains constant. b stops. c increases. d decreases.
3 answers
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238 views
The total amount of energy in the universe never changes, but the amount of energy available for work at any given moment varies
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Anonymous ;)
111 views
Christopher and his mother went on a camping trip. His mother struck a match to light a lantern. Which forms of energy did the
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Anonymous ;)
212 views
Current-carrying wires produce which kind of fields?
a frictional b gravitational c chemical d magnetic
3 answers
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Anonymous ;)
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A magnet can hold a piece of paper to the door of a refrigerator. How does the magnet stick without touching the door?
a The
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Anonymous ;)
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The driver of a car completes a trip. The graph displays data about the car's motion during the trip.
Which of the following
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A student holds two positively charged balloons near each other. She claims that magnetic forces exist between the balloons.
3 answers
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Anonymous ;)
250 views
Which statement best describes gravitational force?
a Objects exert a gravitational force on every other object. b Objects exert
1 answer
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Anonymous ;)
242 views
Which of the following statements regarding electric insulators is correct?
a Electric insulators have high tensile strength. b
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Anonymous ;)
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An electric motor uses regular magnets and an electromagnet to create motion. The attracting and repelling forces create
1 answer
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Anonymous ;)
309 views
Which occurs when neutral object A is charged by induction by charged object B?
a Charges on object B are rearranged. b Charge
1 answer
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A student claims that the gravitational force between two objects depends upon the mass of the objects and the distance between
4 answers
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Anonymous ;)
462 views
The table below shows the farthest distance that magnets M, N, O, P can reach to pull a paper clip toward them.
Magnet Farthest
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Anonymous ;)
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What must an object gain or lose to become electrically charged?
Responses nucleus nucleus protons protons electrons electrons
1 answer
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105 views
A student is investigating the distribution of charge in a conductor. He attaches two unopened soda cans on their sides to two
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Robin has an iron rod around which she wraps copper wire. She places the device on a table near a compass. What will happen to
3 answers
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Anonymous ;)
337 views
If two charges are attracted to each other, then which of the following is true?
Responses Both charges must be equal in value.
1 answer
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Anonymous ;)
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A student claims that the gravitational force between two objects depends on the mass of the objects and the distance between
2 answers
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Anonymous ;)
196 views
Danielle took an iron nail and wrapped thin copper wire around it, then connected the ends of the copper wire to a battery.
3 answers
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Anonymous ;)
238 views
A student rubs a rubber rod with fur, producing a negative charge on the rod. The student then touches the rod to a hollow,
1 answer
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Anonymous ;)
268 views
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