Astronomy A ( fall 2015) Flashcards
All objects are attracted to each other by the force of
gravity
Which motion causes day and night on a planet
a. Revolution
b. Rotation
Rotation
What date is the Fall Equinox?
September 21st each year
What date is the Spring Equinox?
March 21st each year
What date is the Winter Solstice?
December 21st each year
What date is the Summer Solstice?
June 21st each year
The highlands on the Moon’s surface are______
mountainous areas created when the moon cooled.
In science we never trust the work of individual scientists. They could be making a mistake. Other scientists must review the methods and results in a process called:
Peer review
Our Earth is not a perfect sphere. It’s real shape is called
An oblate sphere
True or False, Facts need to be testable, observable and measurable in an experiment
True
The melting of the sea ice in the arctic ocean is changing the planets reflectively. Less ice means the planet will get?
a. colder by reflecting the heat back into space.
b. warmer because less sunlight is reflected back into space
c. warmer because ice is cold.
d. colder because Polar Bears feed on the ice.
b. warmer because less sunlight is reflected back into space
The temperature of the moon’s surface varies greatly from day to night because the moon has_______
no atmosphere
How long is the Earths rotation?
about 24 hours
How long is the Earths Revolution?
365.24 days
How long is the wobble of the Earths axis?
26,000 years
What is a solar eclipse?
When the moon comes between the Earth and the sun
What is a Lunar eclipse?
When the Earth comes between the sun and the moon
What motion causes day and night on a planet?
Rotation
Which branch of science studies stars?
Astronomy
Because the moon rotates once for each revolution around earth,_____
a. you see some phases more than others
b. the far side of the moon is visible only during a full moon phase
c. you never see the far side of the moon
d. a different side of the moon faces Earth each day.
c. You never see the far side of the moon
What are the steps of the scientific method, in order
- State the problem
- Gather information
- State the hypothesis
- Design an experiment
- Conduct the experiment
- Analyze the results
- State your conclusions
What is it called when a scientist studies modern rivers and their sediments to determine how ancient buried river sediments were deposited?
uniformitarianism
Is it safe to look at the sun during an eclipse?
no- you need special filters to protect your eyes
Maria on the Earths surface are_________
lava flows that cooled long ago
Earths rotation takes about
a. 6 months
b. 1 month
c. 365 days
d. 24 hours
d. 24 hours
A hypothesis that has been tested repeatedly and found to be true in every case is now called a
theory
What causes the seasonal change in temperature between July and December
The rotational axis of the Earth is tilted 23.5 degrees
Which has a shorter period of rotation, the earth or the moon
moon
How long does it take for the Earth to make one complete revolution around the sun
one year
Craters on the moon are caused by______
blast pits for the impacts of meteoroids
What moon phase is neede for an eclipse
new moon for a solar eclipse
full moon for an lunar eclipse
which eclipse is more rare?
solar eclipse
The shape of the orbit of the earth is called
an ellipse
