| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.42 |
| Score | 0% | 68% |
The heat from the Sun traveling to Earth is an example of which of the following?
radiation |
|
convection |
|
conduction |
|
electricity |
Radiation occurs when electromagnetic waves transmit heat. An example is the heat from the Sun as it travels to Earth.
An endoskeleton (internal skeleton) is a charateristic of __________ animals, including humans.
spiny |
|
arthropod |
|
vertebrate |
|
sentient |
An endoskeleton (internal skeleton) is a charateristic of vertebrate animals, including humans.
Which of blood component allows blood to clot?
white blood cells |
|
red blood cells |
|
plasma |
|
platelets |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.
During the water cycle, water enters the atmosphere as a gas through which process?
both evaporation and transpiration |
|
precipitation |
|
evaporation |
|
transpiration |
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.
Velocity is the rate at which an object changes position. What is the formula for velocity?
\(\vec{v} = \vec{d}t \) |
|
\(\vec{v} = { t \over \vec{d} } \) |
|
\(\vec{v} = { \vec{d} \over t } \) |
|
none of these |
Velocity is the rate at which an object changes position. Rate is measured in time and position is measured in displacement so the formula for velocity becomes \(\vec{v} = { \vec{d} \over t } \)