| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.70 |
| Score | 0% | 74% |
Which of the following is not a base unit in the metric system?
liter |
|
gram |
|
degree Fahrenheit |
|
meter |
The Fahrenheit scale is used for measuring temperature in the British system. The metric system uses the Celsius scale.
What is the body's largest artery?
aorta |
|
arteriole |
|
vena cava |
|
capillary |
The aorta is the body's largest artery and receives blood from the pulmonary vein via the left ventricle. From there, blood is circulated through the rest of the body through smaller arteries called arterioles that branch out from the heart. Finally, blood is delivered to bodily tissues through capillaries.
During digestion, the kidneys filter substances from the blood. Which of the following is not filtered by the kidneys?
minerals |
|
water |
|
fats |
|
salt |
Chemical waste like excess water, minerals, and salt are filtered from the blood by the kidneys and secreted into the urine. Urine is transported from the kidneys to the bladder through ureters.
In the food chain, bacteria and fungi convert the organic matter in the dead bodies of plants and animals into simple nutrients. Bacteria and fungi are:
decomposers |
|
producers |
|
primary consumers |
|
scavengers |
Decomposers (saprotrophs) are organisms such as bacteria and fungi that break down the organic matter in the dead bodies of plants and animals into simple nutrients.
Which of the following is not a characteristic of the Sun?
formed 2.6 billion years ago |
|
is a yellow dwarf star |
|
is composed of hydrogen and helium |
|
makes up over 99% of the mass of the solar system |
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.