Whet is the name of different colors of light, which produce glowing "streamers" or "curtains" of light in the night sky?
What are auroras
100
What is the name of an electric current flowing through a coil of wire wrapped around solid iron core?
What is an electromagnet
100
What is a generator?
What is a machine that turns mechanical energy into electrical energy.
100
What is the most energy used in the USA?
What is coal
100
What si the defenition of a generator?
What is a machine that turns mechanical energy into electrical energy
200
Why do birds, dolphins, and honeybees use the Earth's magnetic field?
What is to find their way back home
200
What is one type of ammeter called?
What is galvanometer
200
What are 3 sources ofmechanical energy?
What are
coal
gas
nuclear power
crank
wind
moving water
200
What is hydroelectricity?
What is Electricity produced by moving water produced by dams that are built on or near large rivers
200
What does MRI stand for?
What is Magnetic Resonance Imaging
300
What are the names of auroras in the 1. Southern Hemisphere and 2. Northern Hemisphere?
What is
1. Aurora Australis
2. Aurora Borealis
300
What do both motors and generators operate through?
What is electromagnetic induction
300
What does an electric motor do?
What is it uses an electromagnet to change electrical energy into mechanical energy.
300
What are the different types of energy?
What is Hydroelectricity, solar energy,tidal energy, wind energy, and geothermal energy
300
What do birds, dolphins, and honeybees use the earths magnetis field for?
What is to find their way home
400
What are three materials that stick to magnets
What are iron, nickel, and cobalt.
400
Can you increase the strength of an electromagnet?
What is yes, increasing the number of turns in the coil makes the magnetic field stronger
400
What are the things used in an electric motor?
What is a power source, rotating wire amature, conductor, and a permanent magnet
400
Explain how the amount of electrical energy used is measured.
What is we measur ethe amount of electrical energy be watts. How you d it is (Wattage x Hours used per day) divided by the number of days you used the computer. That is how much you are suppose to pay
400
Why do't compasses work on the moon of mars?
What is they don't have magnetic fields because their cores don't have enough multiliquidmel.
500
Describe what happens to magnets in these situations:
a) North Pole to North Pole
b) South Pole to South Pole
c) South Pole to North Pole
d) North Pole to South Pole
What is a) They repel b) They repel c) They attract d) They attract
500
What are the steps to making a door bell ring?
What are 1. it opens and closes an electric circuit connected to an electromagnet 2. When you push the button of the doorbell, you close a circuit that sends the current through a coil 3. the coil becomes an electromagnet that repels a permanent magnet inside the coil
500
How does a commutator reverse the current?
What is reversing the current flips the poles of the coil. The poles of one magnet repel the poles of the other magnet. The coil keeps turning in the same direction until its two poles find the poles of the magnet
500
What are some ways to conserve energy?
What is
1.Turn off the lights when no one is in the room
2.During the day, open blinds or the drapes instead of turning on the light
3.Conserve water
4.Close doors or windows when heating of cooling the room
500
What causes the earth's magnetic field?
What is Earth has iron and nickel and the spin of the Earth makes the electrons flow in huge loops. The magnetic field goes way out into space