Our Solar System
Name all the planets in order from closest to the sun to farthest
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
One of the biggest pieces of evidence of the Big Bang is that...
The universe is still expanding
In the centre of an atom are the:
Protons and neutrons
What form of nuclear radiation is the easiest to stop?
Alpha
What is it called when we split a nucleus into two smaller nuclei?
Fission
What is in the middle for a lunar eclipse? The Earth, the moon, or the sun?
The Earth
The model of the universe with the sun in the centre:
The model of the universe with the Earth in the centre:
The heliocentric model
The geocentric model
Gamma radiation travels as waves called:
Photons (fotoner)
What particle does alpha radiation emit?
What particle does beta radiation emit?
Helium nucleus (2 protons, 2 neutrons)
Electron
What type of reaction do we see in the Sun and stars?
Fusion
The biggest planet in the solar system:
The smallest planet in the solar system:
Jupiter, Mercury
When a star explodes it is called a:
The cloud of "dust" left over is a:
Supernova, Nebula
Isotopes are unstable because they have
A different number of neutrons
What type of radiation is used in a smoke detector? How does it work
Alpha radiation. Smoke detectors have a constant flow of alpha particles and if smoke disrupts it, then the alarm goes off.
What type of reaction is most commonly used to make nuclear bombs?
Nuclear Fission
Where would you find:
A meteor-
A meteorite-
A meteoroid-
In the atmosphere
On Earth
In Outer Space
How long ago was the first model of the universe created?
2500 years ago
The tool we use to measure radiation is a:
The unit radiation is measured in is:
Geiger counter
Bq
What type of radiation can be used in radiation therapy to treat cancer? Why is it effective?
Gamma radiation. It is very penetrating (genomträngade) and ionizing
What can we shoot at an unstable nucleus to make it split apart?
A neutron
why do we have leap years? (skottår)
It takes the Earth a little more than 365 days to rotate around the sun (approx 365.25 days)
Name one of the scientists who helped prove that planets rotate around the sun
Galileo or Copernicus
Which is the strongest electromagnetic wave? radiowaves, light, or X-Rays?
X-Rays
An isotope has a half life of 200 years. If we start with 80g, how much is left after 600 years?
10g
Name one reason why a fusion reactor could be better than a fission reactor
- We have a lot of hydrogen
- Fusion produces more energy
- Fusion reactors would create less waste
- The waste from a fusion reactor would be safer