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Eberhard Sci. Ch. 4
Eberhard Science Ch. 4 Space
| Question | Answer |
|---|---|
| What is a fair test? | an investigation in which only one factor is changed so that you can tell if that factor affected the results |
| What does rotate mean? | to spin on its axis |
| How long does it take Earth to rotate one time? | 24 hours |
| Why do we have night and day? | Because Earth rotates, only the side of Earth facing the Sun is lit and has day; the side not facing the Sun has night. |
| Explain how the Earth revolves. | The Earth moves around the Sun in an oval-shaped orbit. |
| How long does it take for the Earth to revolve one time? | a year (365 days) |
| Why do planets have years of different lengths? | A planet closer to the Sun has a shorter orbit, so its year is shorter. A planet farther from the Sun has a longer orbit and a longer year. |
| Why do we have seasons? | The Earth is tilted on its axis, so as it revolves around the Sun, the Northern or Southern hemispheres receives more direct sunlight, causing it to have summer while the other hemisphere has winter. |
| When does the Northern hemisphere have summer? | when the Northern hemisphere is tilted toward the Sun |
| When does the Earth have Spring or Fall? | when neither part of Earth is pointed directly toward or away from the Sun |
| What is the Earth's axis? | the imaginary straight line through the center of the Earth around which the Earth rotates |
| What do shadows look like in the morning and in the evening? | long |
| What do shadows look like at noon? | very short |
| What does the Sun produce? | heat and light |
| What causes weather conditions on Earth? | the Sun's energy |
| What causes the water cycle on Earth? | the Sun's energy |
| What are fossil fuels? | coal, oil, and natural gas that formed from organisms that died long ago, storing the Sun's energy |
| What is the Sun? | a star, a large ball of glowing gases that is very hot |
| Where is the Sun in our solar system? | in the center |
| What is a manipulated variable? | the variable in an investigation that is changed |
| What is a responding variable? | the variable in an investigation that changes as a result of the manipulated variable |
| What is the Moon? | a natural satellite that orbits the Earth |
| What is the surface of the Moon like? | rocky, dusty, many craters, no water or atmosphere |
| Why can we see the Moon? | it reflects light from the Sun |
| Why does the Moon appear to change shapes? | because of the position of the Sun, Moon, and Earth |
| What are phases? | the changing shapes of the Moon |
| Describe a full Moon. | the entire side facing Earth is lighted |
| Describe a quarter Moon (half moon). | half of the side facing Earth is lighted, the other half is dark; the Moon looks like a half circle |
| Describe a new Moon. | the entire side facing Earth is dark |
| How long does it take for the Moon to go though all its phases? | about one month ("moonth") |
| What causes ocean tides? | the Moon's pull (gravity) on the Earth makes the surface level of the ocean rise and fall. |
| What are tides? | the change in the ocean's surface level |
| Describe high tide. | When the ocean water level is the highest |
| Describe low tide. | When the ocean water level is the lowest |
| How many high and low tides are there each day? | 2 high and 2 low tides |
| What are quantitative observations? | Observations that use numbers, amounts, or measurements |
| What are qualitative observations? | observations are made using only the senses |
| What are planets? | natural satellites that orbit the Sun |
| What are the rocky planets? | the four planets closest to the Sun; Mercury, Venus, Earth, and Mars |
| What are the gas giants? | the four planets beyond Mars that are made up mostly of gases; Jupiter, Saturn, Uranus, and Neptune |
| Describe Earth as a planet | the fourth planet from the Sun, it has oxygen in its atmosphere and liquid water |
| Why do scientists use telescopes? | to study objects in outer space |
| How does a telescope work? | It gathers more light than the eye, so it makes faraway objects seem brighter and closer. |
| Name the planets in order from the Sun. | Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune |
Created by:
betheb
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