End of Year Vocab Week 1

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances

Front

Which of the following is an example of a compound? Gold (Au), Nitrogen (N2), Oxygen (O2), Water (H2O)

Back

Water (H2O)

Front

What defines a pure substance?

Back

It has a definite and constant composition

Front

Which of the following is a mixture? Options: Water (H2O), Table salt (NaCl), Saltwater, Pure gold

Back

Saltwater

Front

Epidemic

Back

A sudden increase in disease cases in a specific area

Front

Pandemic

Back

A widespread outbreak of a disease affecting many countries

Front

Mutualism

Back

A relationship where both organisms benefit

Front

Parasitism

Back

A relationship where one organism benefits and the other is harmed

Front

What is competition in an ecosystem?

Back

Organisms fighting for the same limited resources

Front

Index fossil

Back

A fossil of an organism that lived for a short period and was widespread