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Jouer Froggy Jumps
1. In an atom, electrons are the particles that orbit the nucleus.
A
True
B
False
C
2. Electric current is produced when protons and neutrons repel each other.
A
True
B
False
C
3. A stable atom has the same number of electrons as protons.
A
True
B
False
C
4. Electrons attract each other because they have the same electrical charge.
A
True
B
False
C
5. In an electric circuit, electricity flows through the wires from the battery to the battery
A
True
B
False
C
6. Inside storm clouds, ice particles bump into each other and become electrically charged.
A
True
B
False
C
7. Lightning is a form of static electricity.
A
True
B
False
C
8. When you comb your hair, the comb pulls neutrons off the hair molecules.
A
True
B
False
C
9. Electric current can easily be stored.
A
True
B
False
C
10. Electricity is a very safe type of energy.
A
True
B
False
C
11. Which pole of a magnet attracts the north pole of another magnet?
A
North Pole
B
South Pole
C
12. Which metal will a magnet attract?
A
steel
B
gold
C
13. What can we use to show the magnetic field of a magnet?
A
iron filings
B
water
C
14. How do we represent the direction of the force in a magnetic field?
A
with circles
B
with arrows
C
15. What can we use to test if an object is a magnet?
A
a paperclip
B
another magnet
C
16. The north pole of the magnetosphere is at the geographical South Pole.
A
True
B
False
C
17. The centre of the Earth is made up of magnetised, solid iron.
A
True
B
False
C
18. The magnetosphere protects us from the Sun.
A
True
B
False
C
19. We can use a compass to find the magnetic north and south poles of the Earth.
A
True
B
False
C
20. A compass needle is made of gold or silver.
A
True
B
False
C
21. Who discovered the connection between magnetism and electricity?
A
Faraday
B
Oersted
C
22. What did Ampere do?
A
He discovered the electrodynamic molecule.
B
He invented the first electric motor.
C
23. What name do modern scientists use instead of "electrodynamic molecule"?
A
electromagnetic rotary device
B
electron
C
24. What modern electric machine is based on Faraday´s work?
A
the dynamo
B
the television
C
25. What effect does an electric current have on a compass needle?
A
It moves it.
B
It produces light energy.
C
26. Does an electric bell need electric current to work?
A
yes
B
no
C
27. Does a Maglev have wheels?
A
yes
B
no
C
28. Does the track for the Maglev need magnets on both sides?
A
yes
B
no
C
29. Does a speaker transform electric current into sound?
A
yes
B
no
C
30. Does a microphone transform electric current into sound?
A
yes
B
no
C
31. Who discovered the electron?
A
Oersted
B
Faraday
C
32. What chemical effect does electricity have?
A
electrolysis
B
thermal energy
C