The _______ is a universal system of measurement based on the number ten.
What is the metric system?
100
The international system of measurement is often referred to as ____________.
What is SI?
100
In most animal cells, a _____________ forms the outside boundary of the cell.
What is a cell membrane?
100
A ______________ is an ectothermic vertebrate that has lungs and scaly skin; the eggs, skin, and kidneys of these animals are adapted to conserve water.
What is a reptile?
100
The most common kind of precipitation is _________, which are at least 0.5 millimeters in diameter.
What is rain?
200
One tool used to measure mass is a ________________.
What is a triple beam balance?
200
The axis on a graph that runs horizontally is the ____________________.
What is X-Axis?
200
The ____________ is the control center that directs the cell's activities and contains information that determines the cell's characteristics.
What is the nucleus?
200
____________ are mammals whose young are born at a very early stage of development and who continue to develop in a pouch on their mother's body.
What are marsupials?
200
Long periods of unusually low precipitation are called ___________.
What is a drought?
300
A plant grows toward the light; this is an example of a _______________.
What is a response?
300
The formula used to calculate distance is ______________.
What is S=D/T?
300
_____________ carries messages back and forth between the brain and every other part of the body, directing and controlling the body.
What is nervous tissue?
300
The skin of most echinoderms is supported by a spiny internal skeleton called an ________________.
What is an endoskeleton?
300
____________ forms when raindrops freeze on a cold surface.
What is freezing rain?
400
A scientist would use a ________________ to identify an organism.
What is a taxonomic key?
400
There are several paths for a current to take in a ___________________________.
What is a parallel circuit?
400
An ___________________ is an animal whose body regulates its own temperature by controlling the internal heat it produces using adaptations such as sweat glands, feathers, or fur to maintain body temperature.
What is an endotherm?
400
An __________________ is an animal such as fishes, amphibians, and reptiles whose body temperature is close to the temperature of their environment.
What is an ectotherm?
400
During each ice age, huge sheets of ice called ___________ covered large parts of the Earth's surface.
What is a glacier?
500
The first word in an organism's scientific name is its ______________________.
What is genus?
500
The transfer of electrical charges without touching is ___________________.
What is induction?
500
___________________ tissue covers the surfaces of your body.
What is Epithelial tissue?
500
An organism that does not make its own food is a _________________________.
What is a heterotroph?
500
________________________ are short term changes in the tropical Pacific Ocean caused by changes in ocean currents and prevailing winds.