Test 7: Celestial Objects, gravity and Space Expolration
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| The celestial ____ that is the center of our solar system, around which every object orbits is the Sun. | body
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| Between the orbits of Mars and _____ is where most of the asteroids in our solar system are located. | Jupiter
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| The composition of the Sun is best described as being _____ and composed of hot gases. | dense
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| All of the inner planets are _____ and terrestrial. | rocky
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| A _____ is a visible streak of light which shows the path of a rocky object which has entered Earth's atmosphere. | meteor
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| Planets in the _____ system follow an orbital path which is most accurately describes as more or less elliptical. | solar
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| The Earth rotates around the Sun and the _____rotates around the Earth. | moon
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| Planets vary as they get farther from the Sun. Generally the farther a planet's orbit from the Sun, the longer it takes to ______ the Sun. | orbit
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| The _____ of all the planets in our solar system is more or less the same. | shape
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| _____ governs the motion of our solar system. | Gravity
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| A _____ has a tail and is generally composed of ice, rock, and frozen gases. | comet
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| Gravity can be defined as the _____ of attraction between two or more masses. | force
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| Mass and _____ affects the strength of the gravitational pull on two objects. | distance
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| To have the _____ gravitational attraction between two masses, they will have the largest distance between them and the largest difference in mass. | smallest
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| The _____ between the motion of the bodies and gravitational forces determines the orbital paths of objects in our solar system. | balance
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| The _____ is a scientific tool that has allowed humans to see better and farther into space. | telescope
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| Some scientists are planning a manned space mission to a rock planet slightly farther from the Sun than Earth. The planet is known as _____. | Mars
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| A supply of _____ for the astronauts, is an important requirement for a manned spacecraft traveling through space. | oxygen
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| Astronauts wear space suits, which provide oxygen, protection, and ______. | communication
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| The International Space Station helps scientists learn how to solve _____ of living in space. | problems
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| A space probe, a _____, and a manned rocket can all communicate with people on Earth. | satellite
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| Until technology discovers a way, _____ to the closes star in another solar system is not possible for a human crew due to the relatively short human life spans and slow travel speeds. | travel
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| The advantage of using telescopes launched into space is the _____ are usually clearer because they do not have to look through our atmosphere. | images
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| Rockets must have enough _____ to overcome Earth's gravity, so humans may explore space. | thrust
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