Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
43 Cards in this Set
- Front
- Back
|
Q.How long does Earth’s rotation take? |
A.24 hours |
|
|
Q.How long does it take Earth to complete one revolution around the sun? |
A.1 year |
|
|
Q.Why does Earth have seasons? |
A.Because Earth’s axis is tilted as it moves around the sun. |
|
|
Q.When the north end of Earth’s axis is tilted toward the sun, describe the sunlight and day length in North America. |
A.More direct rays and longer days |
|
|
Q.What does the moon phase we see from Earth depend on? |
A.how much of the sunlit side of the moon faces Earth |
|
|
Q.How must the Earth, sun and moon be ordered to experience a solar eclipse? |
A.the moon must be directly between Earth and the sun |
|
|
Q.What did Galileo see on the moon’s surface? |
A.round pits called craters |
|
|
Q.How do scientists think the moon was formed? |
A.a large object struck Earth, and ejected material from the collision combined |
|
|
Q.Describe the position of the Earth during an equinox. |
A.neither end of Earth’s axis is tilted toward or away from the sun |
|
|
Q.When does the moon appear to be cut in half? |
A.first quarter and third quarter phase |
|
|
Q.What law says that all objects are attracted to each other? |
A.the force of gravity |
|
|
Q.What event began the Space Race? |
A.The Soviet Union launched Sputnik I |
|
|
Q.Who was competing in the Space Race? |
A.the United States and the Soviet Union |
|
|
Q.What is the space shuttle? |
A.A reusable spacecraft that can be used many times to carry astronauts into orbit |
|
|
Q.What do both reflecting and refracting telescopes do with visible light? |
A.gather and focus visible light |
|
|
Q.What characteristics are used to classify stars? |
A.size, brightness, temperature, color, composition |
|
|
Q.When nuclear fusion starts, what is happening to a star? |
A.it is dying |
|
|
Q.What does the lifetime of a star depend on? |
A.it’s mass |
|
|
Q.What is a supernova? |
A.the explosion of a dying high-mass star |
|
|
Q.What type of galaxy is the Milky Way? |
A.spiral galaxy |
|
|
Q.What is the name of the theory that scientists believe formed the universe? |
A.Big bang theory |
|
|
Q.What did the solar system form from? |
A.a giant cloud of gas and dust |
|
|
Q.What happens to Earth in a heliocentric system? |
A.Earth revolves around the Sun |
|
|
Q.What do all of the inner planets have in common? |
A.They all are small and have rocky surfaces |
|
|
Q.Where is the asteroid belt located in the solar system? |
A.between Mars and Jupiter |
|
|
Q.Where do meteoroids come from? |
A.comets or asteroids |
|
|
Q.What are the conditions necessary for life on Earth? |
A.liquid water |
|
|
Q.What are the reasons that scientists think that Mars once may have had life? |
A.evidence that liquid water was once present |
|
|
Q.What are Saturn’s rings made mostly of? |
A.chunks of ice and rock |
|
|
Q.Why is Uranus different from most other planets? |
A.rotates on its side |
|
|
Q.Why is Jupiter unique? |
A.It is the largest and most massive planet |
|
|
Q.What causes day and night? |
A.Earth’s rotation on its axis |
|
|
Q.What are the flat areas on the moon’s surface? |
A.maria |
|
|
Q. Because galaxies are moving away from each other, what can be said about the universe? |
A.it is expanding |
|
|
Q.What is the minimum number of stars in a star system? |
A.2 |
|
|
Q.What model shows Earth as the center of the solar system? |
A.geocentric |
|
|
Q.Where is the Great Red Spot found? |
A.Jupiter |
|
|
Q. Why can the moon be seen from the Earth? |
A.because sunlight reflects off the moon’s surface |
|
|
Q.When a shuttle returns from a mission, how does it land? |
A.like an airplane |
|
|
Q.Stars begin as a large cloud of gas and dust. What is this called? |
A.nebula |
|
|
Q.Draw a picture of and name each of the 8 moon phases in the order that they occur. |
A.New Moon: H Full Moon: BWaxing Crescent: A Waning Gibbous: FFirst Quarter: E Third Quarter: CWaxing Gibbous: G Waning Crescent: D |
|
|
Q.How much time passes between a new moon and a full moon? |
A.about 15 days |
|
|
Q.Draw the two gibbous moons. |
A.Waxing Gibbous Waning Gibbous |
