| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.46 |
| Score | 0% | 69% |
The gravitational interaction of Earth and the Moon is responsible for which of these?
tides |
|
the northern lights |
|
seasons |
|
day and night cycle |
Tides are caused by the gravitational interaction of Earth and the Moon.
The energy posessed by a thrown baseball is an example of what kind of energy?
gravitational |
|
transitional |
|
potential |
|
kinetic |
Kinetic energy is the energy posessed by a moving object. Potential energy is stored energy in a stationary object based on its location, position, shape, or state.
Food is mixed with gastric acid and pepsin in the __________ to help break down protein.
mouth |
|
stomach |
|
large intestine |
|
small intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
The pitch of the siren of an approaching ambulance changes as it approaches you. This is an example of which of the following?
refraction |
|
reflection |
|
Doppler effect |
|
sound radiation |
The Doppler effect occurs when the source or listener (or both) of sound waves is moving. If they're moving closer together, the listener perceives the sound with a higher pitch and, when they're moving apart, the listener perceives the sound with a lower pitch.
Which of the following describes the Earth's outer core?
primarily solid |
|
makes up most of the Earth's volume |
|
solid |
|
liquid |
The Earth's core is divided into the liquid outer core (1,430 miles or 2,300 km radius) and the solid inner core (745 miles or 1,200 km radius).