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6th Science Ch 6
| Question | Answer |
|---|---|
| One complete revolution of earth around the sun takes about | one year |
| Earth has seasons because | its axis is tilted as it moves around the sun |
| In the southern hemisphere, the summer solstice occurs when the sun is | farthest south |
| All objects are attracted to each other by the force of | gravity |
| The strength of the force of gravity depends on | the masses of the objects and the distance betrwen them |
| A pattern or grouping of stars imagined by people to represent a figure is a | constellation |
| The tendency of a moving object to continue moving in a straight line or a stationary object to remain | inertia |
| The phase of the moon you see depends on | how much of the sunlit side of the moon faces earth |
| When a meteoroid enters earth’s atmosphere, it produces a streak of light called a(n) | meteor |
| The constellations seem to move as the seasons on earth change. What causes this? | as earth revolves around the sun, we have a different view of the stars |
| Earth’s rotation takes avout | 24 hours |
| Day and night are caused by | earth’s rotation on its axis. |
| An equinox occurs when | neither hemisphere is tilted toward or away from the sun |
| The two factors that combine to keep earth and the moon in their orbits are | gravity and inertia |
| From new moon phase to full moon phase, you see | an increasing amount of the lit side of the moon |
| Because the moon rotates once for each revolution around earth, | you never see the far side of the moon from Earth |
| The amount of the lit side of the moon you can see is the same during | first quarter and third quarter phase |
| The different shapes of the moon seen from Earth are called | phases |
| For a solar eclipse to occur | the moon must be directly between Earth and the sun |
| During what phase of the moon can a lunar eclipse occur? | full moon |
| You are less likely to see a total solar eclipse than a total lunar eclipse because | the moon's umbra only covers a small area on Earth's surface |
| A total solar eclipse is visible from | only within the moons umbra |
| During ta total lunar eclipse the moon is in Earth’s | umbra |
| When are tides highest? | when the sun, Earth, and the moon are nearly in a line |
| Tides are caused mainly by | differences in how much the moon and the sun pull on different parts of earth |
| When do neap tides occur? | when the sun’s pull is at right angles to the moon’s pull |
| Maria on the moon’s surface were formed by ancient | lava flows |
| Galileo saw that much of the moon’s suface is covered with round pits called | craters |
| How large is the moon compared to Earth? | about ¼ the diameter of earth |
| The temperature of the moon’s surface varies greatly from day to night because the moon has | no atmosphere |
| Where might water be found on the moon? | near the poles |
| The times when day and night are of equal | equinoxes |
| length are called The force that pulls the moon toward Earth is called | gravity |
| If you are in a car that stops suddenly, your body keeps moving because it has | inertia |
| The darkest part of the moon's shadow is called the | umbra |
| A tide with the least distance between low and high tides is called a(n) _____tide | neap |
| The sun and moon seem to move across the sky each day because of Earth's ____on its axis | rotation |
| Earth rotates on its axis about once every ___hours | 24 |
| Seasons on Earth are caused by the ___ of Earth's axis as Earth revolves around the sun | tilt |
| The tendency for an object in motion to remain in motion is called _____ | inertia |
| The lit half of the moon faces away from Earth during the _____ phase of the moon | new |
| The moon can be seen from Earth because ___ reflects off the moon's surface | sun light |
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