| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.73 |
| Score | 0% | 55% |
Water freezing or boiling is an example of which of the following?
heating |
|
phase transition |
|
sublimation |
|
cooling |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.
Meteoroids, meteors and meteorites are categorized based on which of the following?
their size |
|
their density |
|
their location |
|
their temperature |
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.
Which of the following temperatures is least like the others?
32°F |
|
absolute zero |
|
0K |
|
-273°C |
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.
What kind of weather front is likely to create clouds and storms?
cold front |
|
stationary front |
|
warm front |
|
temperate front |
A warm front is the boundary between warm and cool (or cold) air when the warm air is replacing the cold air. Warm air at the surface pushes above the cool air mass creating clouds and storms.
Which of these does not contain oxygenated blood?
right atrium |
|
aorta |
|
left ventricle |
|
pulmonary vein |
To provide oxygen to the body, blood flows through the heart in a path formed by the right atrium → right ventricle → lungs → left atrium → left ventricle → body. When blood enters the right side of the heart it is deoxygenated. It enters the left side of the heart oxygenated after traveling to the lungs.