What does "invasive" mean?

• Harmless and easygoing

• Tending to spread harmfully or aggressively

• Hard to control

• Possess virus or bactery

Fill in the blank: A __________ species can disrupt entire ecosystems by dominating and harming native species.

• Invasive
• Lithic

• Keystone

• Substandard

"Keystone" refers to:

• A species that has a disproportionately large impact on its environment

• A type of rock

• Something insignificant

• A small part of a structure

Which of the following means to use something to maximum advantage?

• Overheat

• Leverage

• Sprawl

• Strain

Fill in the blank: Archaeologists studied __________ tools to understand early human life.

• Lithic
• Phony

• Keystone

• Nefarious

"Monoculture" refers to:

• A diverse system

• Growing a single crop or plant species in a field

• Multiple species working together

• None of the above

True or False: "Nefarious" describes actions that are wicked or criminal.

• True

• False, Benign

• False, Harmonious

Which word best describes a quick summary of something?

• Nutshell

• Overheat

• Strain

• Scarce

What does "overheat" mean?

• To cool down quickly

• To become too hot

• To maintain normal temperature

• To freeze

Fill in the blank: Explorers faced great __________ when crossing the dangerous mountains.

• Peril
• Pleas

• Stake

• Strain