S1 exam

Front

What is a sign that a chemical reaction has occurred?

Back

Formation of a gas.

Front

How many feet are in 60 inches?

Back

5 feet.

Front

What is true about all atoms of a given element?

Back

They all have the same number of protons.

Front

What is the first step in the scientific method?

Back

Observe a problem.

Front

What is the scientific notation for the number 455000?

Back

4.55 x 10^5.

Front

What is a chemical reaction?

Back

A process that leads to the transformation of one set of chemical substances to another.

Front

What is the definition of scientific notation?

Back

A way of expressing numbers that are too big or too small to be conveniently written in decimal form.

Front

What is the formula for converting inches to feet?

Back

Feet = Inches ÷ 12.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a hypothesis?

Back

A proposed explanation for a phenomenon, to be tested through experimentation.