| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.56 |
| Score | 0% | 71% |
A subatomic particle found in the nucleus of an atom. It carries no electric charge. This desribes which of the following?
atom |
|
neutron |
|
electron |
|
proton |
A neutron is a subatomic particle found in the nucleus of an atom. It is neutral as it carries no electric charge.
Which of the following is the primary difference between a comet and an asteroid?
asteroids contain frozen water |
|
comets orbit the Sun |
|
asteroids have a coma |
|
comets have an atmosphere |
A comet is a loose collection of ice, dust, and small rocky particles that, in contrast to an asteroid, has an extended atmosphere surrounding the center. When passing close to the Sun, this atmosphere warms and begins to release gases forming a visible coma or tail.
__________ and __________ pair to strengthen bones.
calcium, vitamin A |
|
iron, calcium |
|
vitamin D, magnesium |
|
vitamin D, calcium |
Vitamin D helps calcium strengthen bones while also aiding muscle, nerve, and immune system function.
An element in the physical state of __________ maintains a constant volume and shape.
solid |
|
liquid |
|
gel |
|
gas |
An element in a solid state has atoms or molecules that are constricted and do not move freely. Solids maintain a constant volume and shape and exist at a lower temperature than liquids or gases.
The brain and spinal cord make up the __________ nervous system.
autonomic |
|
central |
|
peripheral |
|
somatic |
The nervous system consists of the brain and spinal cord (central nervous system) and the peripheral nervous system which is the network of nerve cells (neurons) that collect and distribute signals from the central nervous system throughout the body.