| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.52 |
| Score | 0% | 70% |
Small rocks shed by asteroids and comets that reach the earth are called:
meteors |
|
shooting stars |
|
meteoroids |
|
meteorites |
Smaller rocks shed by asteroids and comets are called meteoroids. When these rocks reach Earth's atmosphere, they burn up in the mesosphere and become meteors. If a meteor manages to reach the Earth, it is called a meteorite.
Saturated fats can __________ LDL ("bad") cholesterol while unsaturated fats can __________ it.
decrease, raise |
|
decrease, stabilize |
|
raise, decrease |
|
stabilize, raise |
Saturated fats can raise LDL ("bad") cholesterol while unsaturated fats can decrease it.
Changes to an object's speed or direction of motion are caused by which of the following?
power |
|
a force |
|
kinetic energy |
|
work |
Force is applied to change an object's speed or direction of motion.
Respiration is the process by which __________ absorb oxygen and eliminate carbon dioxide.
bronchioles |
|
capillaries |
|
blood cells |
|
diaphragms |
The respiratory system manages respiration which is the process by which blood cells absorb oxygen and eliminate carbon dioxide.
What part of the food chain serves only as food for other organisms?
secondary consumers |
|
decomposers |
|
producers |
|
primary consumers |
Producers (autotrophs) serve as a food source for other organisms. Typical producers are plants that can make their own food through photosynthesis and certain bacteria that are capable of converting inorganic substances into food through chemosynthesis