| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.14 |
| Score | 0% | 63% |
In the heart, the __________ artery and vein manage blood flow to the lungs.
aorta |
|
atrial |
|
pulmonary |
|
capillary |
The two largest veins in the body, the venae cavae, pass blood to the right ventricle which pumps the blood to the lungs through the pulmonary artery. Blood picks up oxygen in the lungs and returns it to the left atrium via the pulmonary vein.
Which of the following represents the largest value?
1 mL |
|
1 ML |
|
1 kL |
|
1 cL |
Mega (M) is 106, kilo (k) is 103, centi (c) is 10-2, milli (m) is 10-3 so 1 ML represents the largest value.
I biome is made up of naturally occurring flora and fauna. Fauna is which of the following?
minerals |
|
habitats |
|
plants |
|
animals |
A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).
The envelope of gases surrounding the planet is called the:
geosphere |
|
hydrosphere |
|
lithosphere |
|
atmosphere |
The biosphere is the global ecological system integrating all living beings and their relationships. This includes their interactions with the lithosphere (the rigid outer part of the earth, consisting of the crust and upper mantle), hydrosphere (all surface water), and atmosphere (the envelope of gases surrounding the planet).
Which of the following is not a characteristic of the Sun?
makes up over 99% of the mass of the solar system |
|
formed 2.6 billion years ago |
|
is a yellow dwarf star |
|
is composed of hydrogen and helium |
The Sun is a G-type main-sequence star (G2V) but is informally known as a yellow dwarf star. Composed of 73% hydrogen and 25% helium, the hot plasma that makes up the Sun reaches 9,900°F (5,505°C) at the surface. It formed approximately 4.6 billion years ago and makes up 99.86% of the mass in the solar system.