| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.09 |
| Score | 0% | 62% |
Changes to an object's speed or direction of motion are caused by which of the following?
kinetic energy |
|
work |
|
power |
|
a force |
Force is applied to change an object's speed or direction of motion.
Which of the following temperatures is least like the others?
-273°C |
|
32°F |
|
0K |
|
absolute zero |
Absolute zero is the coldest possible temperature in the universe. In the Kelvin scale, absolute zero is 0K and in the Celsius scale it is -273°C.
In a eukaryotic cell, which organelles deal with proteins?
Golgi apparatus |
|
endoplasmic reticulum |
|
ribosomes |
|
all of these deal with proteins |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles. Ribosomes produce proteins, endoplasmic reticulum helps synthesize proteins and fats, and Golgi apparatus prepares proteins for use.
Convert 0C° to F°.
32 |
|
-32 |
|
0 |
|
16 |
To convert from C° to F° use:
\(F° = {9 \over 5}C° + 32\)
\(F° = {9 \over 5}(0) + 32\)
\(F° = 0 + 32 = 32\)
The two heart chambers that pump blood called:
valves |
|
aorta |
|
ventricles |
|
atria |
The heart is the organ that drives the circulatory system. In humans, it consists of four chambers with two that collect blood called atria and two that pump blood called ventricles. The heart's valves prevent blood pumped out of the ventricles from flowing back into the heart.