Vocabulary from Buehler Challenger & Science Center

Mars is the ______ planet from the Sun.

• fourth

• second

• fifth

• third

Phobos is the larger of Mars' two ______.

• moons

• planets

• stars

• comets

Deimos is the smaller of Mars' two ______.

• moons

• rings

• volcanoes

• craters

An asteroid is a small rocky body orbiting the ______.

• sun

• moon

• earth

• mars

Ejecta is material that is forced or thrown out, especially as the result of volcanic eruption, meteoritic impact, or stellar ______.

• explosion

• implosion

• formation

• collapse

An expedition is a journey or voyage undertaken by a group of people with a particular purpose, especially that of exploration and scientific ______.

• research

• discovery

• adventure

• tourism

Extremophiles are organisms that can live in extreme conditions, including extremes of temperature, exposure to radiation, salinity or ______ level.

• pH

• oxygen

• carbon dioxide

• nitrogen

Humidity is the amount of water vapor in the atmosphere or a ______.

• gas

• liquid

• solid

• plasma

A joule (abbreviated J) is a measure of energy or work equivalent to the amount of electricity needed to run a 1-watt device for 1 second, for example a 100 W lightbulb would burn 100 J per ______.

• second

• minute

• hour

• day

Minerals are natural substances of definite chemical composition and usually of clearly defined crystal ______.

• structure

• color

• weight

• density