Level 2
Level 3

Physics


30 words 0 ignored

Ready to learn       Ready to review

Ignore words

Check the boxes below to ignore/unignore words, then click save at the bottom. Ignored words will never appear in any learning session.

All None

Ignore?
geocentric
a theory that the earth is at the centre of our solar system.
Heliocentric
a theory that our sun is at the centre of our solar system.
refracting telescope
a telescope that just uses lenses.
reflecting telescope
a telescope that uses mirrors and lenses.
interstellar medium
the gas and dust between stars.
star nebulae
a large amount of gas coming together because of gravity.
nebula
lots of dust and gas that will form more than one planet or sun.
protostar
it happens after a nebula. Parts of the clouds collapse because of gravity and it gets hotter.
main sequence star
It happens after a protostar. It is the longest and strongest stage of the stars life.
red giant
It happens in smaller stars after main sequence star. The star gets bigger as it runs out of hydrogen or helium.
red supergiant
It happens in bigger stars after main sequence star. The star gets bigger as it runs out of hydrogen or helium.
white dwarf
It happens after red giant. It loses its outer layers and becomes hot and dense.
black dwarf
It happens after white dwarf. It is when it loses its heat and light.
supernova
It happens after red supergiant. It is when it loses its outer layers and becomes very bright.
black hole
it happens to GIANT stars after supernova. It loses its light but the gravity pulls everything inside it.
neutron star
it happens to BIG stars after supernova. It becomes very small and bright.
steady state theory
an idea that the universe always existed, is always expanding and creates matter.
big bang theory
an idea that the universe started at one point, is expanding and does not create matter.
redshift
it is the colours of the wavelength depending on how long they are.
infrasound
a sound that is below our hearing. (below 20 Hz)
ultrasound
a sound that is above our hearing.
epicentre
a point on the surface above where the earthquake is.
focus
the point where the earthquake started. (underground)
siesmometer
a machine that can tell if there is an earthquake.
p waves
they are longitudinal and arrive at an earthquake first.
s waves
they are transverse and arrive second at an earthquake.
electricity
energy of charged particles.
current
the flow of charged particles.
voltage
a way to measure the change in energy.
equilibrium
the same amount going into something as going out.