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18 Cards in this Set

  • Front
  • Back
Mercury is the closest planet to what?
the sun
In what ways are comets similiar to asteroids?
Both orbit the sun.
Which body orbits a planet?
a moon
What causes a solar flare?
an eruption on the sun's surface
Scientists think the number of sunspots are affected by ________________.
the temperature on Earth
Which planet in the solar system has the most rings surrounding it?
The part of the planet that points away from the sun is called the __________________.
How do scientists think planets were formed?
The planets formed from a cloud of gas and dust.
The sun's core produces large amounts of heat and ______________.
In which way does a telescope change how objects look?
It makes distant objects look nearer.
One rotation of a planet is equal to ______________.
a day
Most of the sun's mass is made up of __________________ gas.
Which two gases make up most of Earth's atmosphere?
oxygen and nitrogen
A meteorite is a meteroid that has _________________.
landed on Earth
What type of information is most likely to be collected by a space probe?
surface temperatures and atmospheres of planets
One revolution of Earth takes _____________.
1 year
Which feature can be seen only during an eclipse of the sun?
the sun's corona
The surface of Venus is ____________________.
hotter than Earth's