| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.22 |
| Score | 0% | 64% |
Molecules and atoms that are inputs to a chemical reaction are known as which of the following?
products |
|
fuel |
|
reactants |
|
components |
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).
The first step in the water cycle is:
infiltration |
|
precipitation |
|
reclamation |
|
evaporation |
The water (hydrologic) cycle describes the movement of water from Earth through the atmosphere and back to Earth. The cycle starts when water evaporates into a gas from bodies of water like rivers, lakes and oceans or transpirates from the leaves of plants.
This skeletal system is common in arthropods like insects, spiders, and crustaceans.
exoskeleton |
|
vertebrate |
|
bone |
|
endoskeleton |
An exoskeleton (external skeleton) is common in arthropods like insects, spiders, and crustaceans.
Which of the following is the formula for power?
\(P = {w \over t}\) |
|
\(P = w t\) |
|
\(P = {\vec{w} \over t}\) |
|
\(P = \vec{w}t\) |
Power is the rate at which work is performed or work per unit time: \(P = {w \over t}\) and is measured in watts (W).
The __________ nervous system controls voluntary actions.
autonomic |
|
central |
|
somatic |
|
peripheral |
Part of the peripheral nervous system, the somatic nervous system is made up of nerve fibers that send sensory information to the central nervous system and control voluntary actions.