Earth and Space Science Flashcards
5 cards from real AZSCI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 5 Earth and Space Science flashcards as text
What causes the seasons on Earth?
Answer: The tilt of the Earth's axis
The Earth's axis is tilted at approximately 23.5 degrees relative to its orbital plane around the Sun. As the Earth revolves, this tilt causes different hemispheres to receive more direct sunlight at various times of the year. This variation in solar intensity and daylight hours is the primary reason for the changing seasons.
Which of the following best describes the Earth's inner core?
Answer: It is a solid layer of iron and nickel.
The Earth's inner core is the planet's innermost layer, characterized by extremely high temperatures and immense pressure. Despite temperatures reaching thousands of degrees Celsius, the overwhelming pressure prevents the iron and nickel from melting, keeping them in a solid, dense state. This solid metallic sphere is distinct from the molten outer core.
Which of the following best explains the phenomenon of a lunar eclipse?
Answer: The Earth casts a shadow on the Moon.
A lunar eclipse occurs when the Earth passes directly between the Sun and the Moon, aligning in a straight line. During this alignment, the Earth blocks the Sun's light from reaching the Moon, casting a shadow on its surface. This causes the Moon to appear dim or take on a reddish hue.
What is the primary source of energy for the Earth's weather systems?
Answer: The Sun
The Sun is the ultimate source of energy that drives nearly all of Earth's weather systems. Solar radiation heats the Earth's surface unevenly, creating temperature differences that lead to atmospheric pressure variations. These pressure differences generate winds, drive the water cycle through evaporation, and power the formation of clouds and precipitation, all integral parts of weather.
Which layer of the Earth's atmosphere contains the ozone layer?
Answer: Stratosphere
The stratosphere is the second major layer of Earth's atmosphere, situated above the troposphere. This layer is crucial because it contains the ozone layer, a region with a high concentration of ozone molecules. The ozone layer absorbs most of the Sun's harmful ultraviolet (UV) radiation, protecting life on Earth from its damaging effects.