- 1. What process occurs within the sun?
A) fission
B) fusion
C) chemical reaction
D) combining
- 2. True or false. Nuclear reactions within the sun produce heat and light.
A) True
B) False
- 3. The sun is mainly composed of what?
A) Hydrogen
B) Carbon
C) Nitrogen
D) Oxygen
- 4. What creates high pressure and temperature within the sun?
A) Chemical reactions within the sun
B) Oxygen combining with Hydrogen
C) The Core
D) Inward pull due to gravity
- 5. A Hydrogen atom contains a nucleus that is made up of ________?
A) Protons and Electrons
B) Neutrons and Electrons
C) Neutrons and Protons
- 6. The fourth state of matter, which can be found inside the sun, can be considered ____________.
A) Energy
B) Volume
C) Plasma
D) Waves
- 7. True or false. The pressure of the sun squeezes particles so tight that they become hot.
A) False
B) True
- 8. True or false. When atoms vibrate, thermal energy (heat) is created.
A) True
B) False
- 9. True or false. All the sun's radiant energy reaches Earth?
A) False
B) True
- 10. Some of the radiant energy released by the sun is absorbed by _____________ before it reaches the Earth's surface.
A) The oceans
B) The Earth's crust
C) The Moon's surface
D) The atmosphere
- 11. True or false. A positively charged nucleus is called an ion.
A) True
B) False
- 12. True or false. Nuclear fusion cannot occur outside the solar core.
A) True
B) False
- 13. Radiation occurs when objects __________________.
A) directly touch each other.
B) do not directly touch each other.
- 14. Energy leaves the Sun as _______, and the other part of this that constitutes visible light is what makes the Sun shine.
A) energy
B) light
C) power
D) radiation
- 15. Much like the same poles on a magnet, the rate of nuclear reactions in the Sun is relatively low, because protons _______ each other. This often prevents them from being able to fuse together.
A) attract
B) repel
- 16. True or false. All of the radiation emitted from the sun reaches the Earth in the form of heat.
A) True
B) False
- 17. If the pace was much ________, the sun would explode like a giant hydrogen bomb.
A) slower
B) weaker
C) stronger
D) faster
- 18. The sun gives off ________ as light energy.
A) Neutrons
B) Power
C) Photons
D) Electrons
- 19. On Earth, lightning is an example of ________________, this is commonly referred to as the fourth state of matter.
A) gas
B) plasma
C) liquid
D) solid
- 20. True or false. The sun radiates energy in all directions because it is a sphere shape.
A) True
B) False
- 21. Some of the energy from the sun is reflected by _____ and ______.
A) clouds, atmosphere
B) air, oxygen
C) trees, building
D) space, planets
- 22. Which process of heat transfer occurs when an object directly touches another object?
A) conduction
B) convection
- 23. True or false. Magma heating itself underground is an example of convection?
A) False
B) True
- 24. Which of these is a process that does NOT transfer heat?
A) photosynthesis
B) conduction
C) radiation
D) convection
- 25. Radiation is the transfer of heat between two objects that...
A) are not touching.
B) are touching.
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