Magnetism Cloze Fill in the blanks with words from the box.
attract
force
morth
aurora borealis
iron
poles
compass
lines
repel
field
nickel
stronger
NW
ON
Magnetism is a
that has the
ability to push or pull some objects such as metals like
or
Magnets have two ends called
When you bring two magnets together, like poles
each other and opposite
attract.
35
1 compass uses the Earth's
magnetic field to point to north.
If you sprinkle iron filings around a magnet, they will form
showing the direction of the magnetic force. These lines of magnetic force are called a
magnetic
The closer the lines are together the
the force.
The Earth generates a magnetic field as well. For
centuries, sailors have used this magnetic field to
help them find
on cloudy
days and nights using a tool called a
The Earth's magnetic field
also causes one of the wonders of nature, the
which is produced when
charged particles in space are pulled into the Earth's
atmosphere by the Earth's magnetic field.
The Earth's magnetic field causes the
aurora borealis.
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answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

a=d/t

a="triangle"v/t

explanation:

a = acceleration

higher potential

explanation:

because it is in a high speed so it must move into a of high potential