| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.30 |
| Score | 0% | 66% |
The four planets closest to the Sun are called terrestrial. What does terrestrial mean?
the planets have water |
|
the planets are Earth-like |
|
the planets have magnetic fields |
|
the planets have moons |
The four planets closest to the Sun (Mercury, Venus, Earth, and Mars) are called terrestrial (Earth-like) planets because, like the Earth, they're solid with inner metal cores covered by rocky surfaces.
Respiration is the process by which __________ absorb oxygen and eliminate carbon dioxide.
bronchioles |
|
blood cells |
|
capillaries |
|
diaphragms |
The respiratory system manages respiration which is the process by which blood cells absorb oxygen and eliminate carbon dioxide.
Which is the proper order of Earth's atmospheric layers from the surface up to space?
stratosphere, troposphere, mesosphere, thermosphere |
|
thermosphere, mesosphere, stratosphere, troposphere |
|
mesosphere, thermosphere, stratosphere, troposphere |
|
troposphere, stratosphere, mesosphere, thermosphere |
The troposphere is the closest layer to Earth, followed by the stratosphere, mesosphere, and finally the thermosphere which borders space.
Blood is created in:
bone marrow |
|
red blood cells |
|
the liver |
|
the heart |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.
Which of the following is not one of the outer planets?
Neptune |
|
Venus |
|
Jupiter |
|
Uranus |
In contrast to the solid terrestrial planets, the outer planets (Jupiter, Saturn, Uranus, and Neptune) consist of hydrogen and helium gas and water.