The correct statement about air pressure is:
A. Air pressure decreases as altitude increases.
As altitude increases, the density of air decreases, leading to lower air pressure.
Air is made up of gas particles. These particles exert pressure on every object they collide against. This pressure is known as air pressure. Which of the following statements about air pressure is true?(1 point) Responses A. Air pressure decreases as altitude increases. A. Air pressure decreases as altitude increases. B. Warm air tends to have a higher air pressure than cold air. B. Warm air tends to have a higher air pressure than cold air. C. The atmosphere's air pressure does not vary. C. The atmosphere's air pressure does not vary. D. Air pressure increases as altitude increases.
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The atmosphere is made up of several layers of air. The bottom two layers are the troposphere and the stratosphere. How does the troposphere differ from the stratosphere? (1 point) Responses A. The troposphere has a lower air pressure than the stratosphere. A. The troposphere has a lower air pressure than the stratosphere. B. The troposphere contains less moisture than the stratosphere. B. The troposphere contains less moisture than the stratosphere. C. The troposphere is much warmer than the stratosphere. C. The troposphere is much warmer than the stratosphere. D. The troposphere contains more ozone molecules than the stratosphere. D. The troposphere contains more ozone molecules than the stratosphere. Skip to navigation
The correct statement about how the troposphere differs from the stratosphere is:
C. The troposphere is much warmer than the stratosphere.
In general, the troposphere (the layer closest to the Earth's surface) experiences a decrease in temperature with altitude, while the stratosphere (above the troposphere) tends to have a more constant or increasing temperature with altitude due to the presence of ozone, which absorbs UV radiation from the sun.
Select each correct answer. More than one answer may be correct. Which of the following objects exerts a gravitational force (1 point) Responses the Moon the Moon the Sun the Sun a basketball a basketball an apple an apple the Earth
All the objects listed exert a gravitational force. Therefore, the correct answers are:
- the Moon
- the Sun
- a basketball
- an apple
- the Earth
Every object with mass exerts a gravitational force, though the strength of that force depends on the mass of the object and the distance between the objects.
Which of the following is true about magnetic poles?(1 point) Responses A. Magnetic poles attract all other magnetic poles. A. Magnetic poles attract all other magnetic poles. B. Magnetic poles repel all other magnetic poles. B. Magnetic poles repel all other magnetic poles. C. Opposite poles attract each other, while like poles repel each other. C. Opposite poles attract each other, while like poles repel each other. D. Opposite poles repel each other, while like poles attract each other.
The correct statement about magnetic poles is:
C. Opposite poles attract each other, while like poles repel each other.
In magnetism, North poles attract South poles, while North poles repel North poles and South poles repel South poles.
The force of attraction between any two objects is known as _______.(1 point) Responses A. friction A. friction B. gravity B. gravity C. magnetism C. magnetism D. electricity D. electricity
The force of attraction between any two objects is known as B. gravity.
The gravitational force between which two objects would be the most difficult to notice? (1 point) Responses A. the Moon and a water particle A. the Moon and a water particle B. the Moon and the Earth B. the Moon and the Earth C. the Earth and the Sun C. the Earth and the Sun D. a water particle and an air particle
The gravitational force between the following two objects would be the most difficult to notice:
D. a water particle and an air particle.
While all masses exert gravitational force on each other, the force between very small objects like a water particle and an air particle is extremely weak and difficult to detect compared to the other options listed, which involve much larger masses.
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