Electricity
The flow of electrons through a wire is called ...
Current
What is an electromagnet?
A. An electromagnet is a normal bar magnet that has a positive charge due to additional protons.
B. An electromagnet is a normal bar magnet that has a negative charge due to additional electrons.
C. An electromagnet is a type of magnet with no magnetic field because of the resistance in a circuit.
D. An electromagnet is a type of magnet where the magnetic field is produced by an electric current.
D
How would a container of gas be affected if the scientist placed the container of gas in a refrigerator overnight.
A. The gas’s volume and particle motion would remain the same.
B. The gas’s volume would increase.
C. The gas pressure would decrease.
D. The gas’s kinetic energy would increase.
C
What subatomic particles are in the nucleus of the atom?
protons and neutrons
What happens during Gamma decay?
Energy is released in the form of gamma rays
If we decreased the amount of resistance in a circuit, what would change and would it increase/decrease?
Which of the following statements is true about electromagnets?
A.Once an electromagnet turns on, it creates a magnetic field forever.
B. Electromagnets, unlike regular magnets, only act on objects that they are touching.
C. Electromagnets, unlike regular magnets, can be turned off so their magnetic field disappears.
D. Electromagnets have weaker magnetic fields when a metal core is added to the coils.
C
Which answer choice correctly describes a separation technique?
A. Evaporation is used to separate a solid substance from a liquid substance by allowing the liquid portion to evaporate.
B. Filtration separates solid components of a mixture based on chemical properties.
C. Filtration is used when all parts of a mixture are small enough to fit through a filter.
D. Chromatography is used to separate mixtures where the components have different boiling points.
A
An atom has 5 protons and 2 neutrons. What is its atomic number?
5
What is nuclear fusion?
When 2 atome combine to form one larger atom
What is the function of the battery in this circuit? Select two.
A. It is the current that powers the circuit.
B. It is a source of electrons.
C. It provides voltage to the circuit.
D. It is the conductor for the circuit.
B and C
If the north side of a magnet comes close to another north side of a magnet, what would happen?
They would repel each other
Select the 3 state changes in which kinetic energy is decreasing.
Melting
Sublimation
Freezing
Evaporation
Condensation
Deposition
Freezing, condensation, and deposition
What does the mass number mean?
The average number of protons and neutrons in the nucleus
What is lost in alpha decay?
2 protons and 2 neutrons (alpha particle)
According to Ohm’s Law, if the resistance of a circuit is kept the same, then as the current in a circuit increases… (What else changes and does it increase/decrease?)
the voltage increases!
How can i create a magnet out of nonmagnetic metal
I can coil a wire with a current around a piece of metal to create a magnetic field
Which type of matter has a definite shape but no definite volume?
Liquid
What is an isotope?
An atom with a different number of neutrons
The half-life of sodium-24 is 10 hours. If you start with 4g of sodium-24, how much will be left after 20 hours?
1 g
What are the four ways you can make the magnetic field of an electromagnet stronger?
Increase the voltage, current, # of loops, and move the loops closer together
What are the 2 factors that effect magnetic field strength?
Mass and Distance
What happens to particles when heat is added?
KE increases, particle motion increases, and pressure decreases
Oxygen has 8 protons. If I take away a proton from Oxygen, what will happen to the atom?
It will no longer be Oxygen as the number of protons is what determines the element type
Carbon-14 has 6 protons and 8 neutrons. It undergoes decay and becomes Nitrogen-14. Nitrogen-14 has 7 protons and 7 neutrons. What type of decay is this?
Beta Minus Decay