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Persh Astro 3 and 4
Persh Astro 3 and 4
| Question | Answer |
|---|---|
| What does the Torino scale? | the sytem used to rate the hazard level of an object moving towards Earth. |
| Why do they study smaller objects in our solar system like comets and asteroids? | They have not changed since the solar system was formed |
| What layer lies just below the crust? | Mantle |
| How are inner planets and outer planets different? | they are closer together |
| What is the effect of distance a planet is from the sun? | The closet a planet is to the sun, the faster it travels around the sun. |
| What is the sun powered by? | nuclear fusion |
| What happens during nuclear fusion in the sun? | Hydrogen nuclei combine to form helium |
| What is unusual about Pluto's moon? | It's more than half of Pluto's size |
| How do planets move if they are closer to the sun? | faster |
| The Earth's revolution is about how long? | 365 days |
| Which scientist made discoveries about motion of planets? | Johannes Kepler |
| Which group of planets does Earth belong to? | the inner planets |
| Which planets do not have natural satellites (moons)? | Mercury and Venus |
| What tool made finding planets easier? | the telescope |
| What bodies in the solar system collided to form Earth and other planets? | planetesimals |
| What is Venus sometimes called Earth's twin? | Venus and Earth are similar in size and density |
| Name one factor that makes life possible on Earth? | liquid water on surface |
| How do scientists think oceans formed? | Millions of years of rainfall |
| What is the largest planet in our solar system? | Jupiter |
| What causes the moon phases? | the positions of the moon, Earth and sun |
| What does a planet with a large orbit have? | long period of revolution |
| What layer of the Earth is the center-most layer? | Core |
| Why do active planets show fewer impact sites than our moon? | Geological activity removes their effects |
| What is the current theory about the origin of our moon? | a large body impacted Earth and blasted some of its mantle into space to form the moon |
| How are gas giants different from terrestrial planets? | they are made mostly of gas |
| What number planet is Saturn and Venus? | Saturn is 6 Venus is 2 |
| Between which two planets is the asteroid belt located? | 4 & 5 |
| What is a nebula? | a large cloud of gas and dust |
| What gas is added to the atmosphere during photosynthesis? | oxygen |
| What is a sunspot? | a cooler area of the photoshere that may affect the climate |
| When you plant a garden, where do we get the soil from? | crust |
| Our solar system was formed from this... | a cloud of dust called the Solar Nebula. |
| What layer of the sun do we see? | photosphere |
| What kind of rotation does Venus have....which means it appears to go clockwise direction? | retrograde |
| What are satellites? | natural or artificial bodies that orbit larger bodies |
| What do some scientists call the dirty snowball? | comets |
| What do we call a counterclockwise spin of a planet? | prograde |
| In relation to the moon phases...what do waxing and waning mean? | waxing - the lit size is getting larger waning - the lit size is getting smaller |
| Know how to label the phases of the moon. | |
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