Front

What type of event occurs at tectonic plate boundaries?

Back

Earthquake, Volcano Eruption, Tornado, Mountain Building.

Front

Water boiling is a _______ change.

Back

Physical Change.

Front

How many Hydrogen atoms are in 4H₂O?

Back

8.

Front

How many grams of NaNO₃ are soluble in 100 g of water at 10 ºC?

Back

80 grams.

Front

Rust on a bike is an example of what type of change?

Back

Chemical change.

Front

What is a physical change?

Back

A change that does not alter the chemical composition of a substance.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What is the formula for water?

Back

H₂O.

Front

What is the process of water turning into vapor called?

Back

Evaporation.

Front

What is the pH level of pure water?

Back

7 (neutral).