Which physical properties can be used to differentiate between metals and non-metals?(1 point)
Responses
Malleability
Malleability
Conductivity
Conductivity
Transparency
Transparency
Solubility
Malleability, conductivity, transparency, and solubility are all physical properties that can be used to differentiate between metals and non-metals.
There is only one answer though
The correct answer is conductivity. Conductivity refers to the ability of a material to conduct heat and electricity. Metals are generally good conductors of heat and electricity, while non-metals are poor conductors. Therefore, conductivity can be used as a physical property to differentiate between metals and non-metals.
Within the alarm clock seen here, energy is transformed. It is time to get up! The alarm clock goes off. What are the energy transformations taking place in your alarm clock?
In an alarm clock, several energy transformations take place.
1) Electrical Energy to Mechanical Energy: When the alarm is triggered, electrical energy from the power source is converted into mechanical energy by the turning gears and motor within the alarm clock. This mechanical energy causes the clock's hands to move and the internal components to work.
2) Mechanical Energy to Sound Energy: In order to produce the alarm sound, the mechanical energy is further transformed into sound energy. This occurs when the mechanism inside the alarm clock vibrates a diaphragm or speaker, producing sound waves that we can hear.
3) Electrical Energy to Light Energy (if applicable): Some alarm clocks also have a digital display or built-in light to illuminate the clock face. In these cases, electrical energy is converted into light energy by the light-emitting diodes (LEDs) or other lighting components.
Overall, the alarm clock undergoes energy transformation from electrical energy to mechanical energy, sound energy, and possibly light energy, depending on its features.
Within the alarm clock seen here, energy is transformed. It is time to get up! The alarm clock goes off. What are the energy transformations taking place in your alarm clock?
(1 point)
Responses
Electrical to magnetic to sound
Electrical to magnetic to sound
Electrical to light + sound
Electrical to light + sound
Electrical to mechanical + light
Electrical to mechanical + light
Chemical to electrical to mechanical
The correct answer is:
Electrical to mechanical + sound
The table below lists 4 substances. Two of the listed substances are elements and two of the listed substances are compounds. Which two of the substances are compounds? Indicate your response by marking two of the substances as compounds and two of the substances as elements.
There is no partial credit for this answer, the table must be filled out entirely correct (the correct two substances selected as compounds and the correct two substances selected as elements) for credit.
(1 point)
Element Compound
Iron (Fe)
Element – Iron (Fe)
Compound – Iron (Fe)
Sodium Chloride (NaCl)
Element – Sodium Chloride (NaCl)
Compound – Sodium Chloride (NaCl)
Carbon dioxide (CO2)
Element – Carbon dioxide (CO 2 )
Compound – Carbon dioxide (CO 2 )
Aluminum (Al)
The correct answer is:
Element - Iron (Fe)
Compound - Sodium Chloride (NaCl)
Compound - Carbon dioxide (CO2)
Element - Aluminum (Al)
In a lab group you combined vinegar and baking soda and observed the results shown in the picture. Choose ALL of the evidence that supports that a chemical change has occurred. Select all that apply. There is no partial credit awarded for this answer.
(1 point)
Responses
A gas is produced.
A gas is produced.
The color changed.
The color changed.
Bubbling occurred.
Bubbling occurred.
The baking soda dissolved.
The baking soda dissolved.
There is a change in the composition of the reactants.