| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.51 |
| Score | 0% | 70% |
Food is mixed with gastric acid and pepsin in the __________ to help break down protein.
mouth |
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stomach |
|
small intestine |
|
large intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
"An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force." This describes which of Newton's laws of motion?
first |
|
second |
|
third |
|
fourth |
Also known as the law of inertia, Newton's first law of motion states that An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
The connective tissue that connects bones to other bones at joints is called:
ligaments |
|
cartilage |
|
tendons |
|
knuckles |
Tough fibrous cords of connective tissue called tendons connect muscles to the skeleton while another type of connective tissue called ligaments connect bones to other bones at joints (elbow, knee, fingers, spinal column).
Generally, an atom has __________ negative electrons orbiting the nucleus as it does positive protons inside.
fewer |
|
double the number of |
|
equal numbers of |
|
more |
An electron is a subatomic particle that orbits the nucleus of an atom. It carries a negative electric charge. Generally, an atom has the same number of negative electrons orbiting the nucleus as it does positive protons inside.
Which of the following is not true of light waves?
can travel through a vacuum |
|
travel faster than sound waves |
|
are mechanical waves |
|
are electromagnetic waves |
Unlike mechanical sound waves that require a physical medium for propagation, light waves are electromagnetic and can travel through empty space. Light waves are also much faster, travelling at 186,000 m/s vs. 343 m/s for sound waves.