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Question | Answer |
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How is the periodic table arranged? | It is arranged in categories of noble gases, metals, nonmetals, and metalloids. |
What are protons, electrons, and neutrons? | Protons are positively charged atoms in the nucleus. Electrons are negatively charged atoms that surround the nucleus. Neutrons are neutrally charged atoms in the nucleus. |
What does the Bohr model show? | It shows how many protons, electrons, and neutrons are in an atom. |
What are chemical and physical changes? | A chemical change occurs when substances become new substances with different properties. A physical change occurs when the matter changes but remains the same kind of matter. |
How many molecules are in the compound 6MgO? | There are 6 molecules in the compound because the coefficient (6) is in front of the compound. |
What is the Law of Conservation of Mass? | A mass cannot be created or destroyed. |
What are lightyears? | The distance between stars and galaxies? |
Is wavelength shorter or higher when the wave frequency increases? | Wavelength is shorter because the higher frequency makes the waves come closer together. |
What is potential and kinetic energy? | Potential energy is energy that is stored and kinetic energy is energy that is in motion. |
How do astronomers use electromagnetic waves? | They use visible light to see what its made of, and infrared to tell the temperature. |
How are stars classified? | Stars are classified by its color, temperature, brightness, and size. |
What is an HR diagram? | An HR diagram is a diagram that classifies the stars due to temperature and magnitude (brightness). |
What is gravity? | It is a force that pulls us closer to the Earth's core. |
How do you describe the sun as a star? | The sun is described as a star with medium size and medium brightness. |
How are main sequence stars classified? | They are classified by their color and size. |
What are balanced and unbalanced forces? | A balanced force is where the forces are even and an unbalanced force is where the forces are not even. |