8th Grade Science Midterm Exam

Front

What did the Rutherford Experiment demonstrate about atoms?

Back

Atoms are made up of mostly empty space.

Front

What is defined as anything that has mass and takes up space?

Back

Matter.

Front

How do you calculate the density of a substance?

Back

Density = Mass/Volume.

Front

What is the density of mercury if it weighs 306.0 g and occupies 22.5 mL?

Back

13.6 g/mL.

Front

Which atom is the simplest?

Back

Hydrogen.

Front

What do you call two or more elements bonded together?

Back

Molecule.

Front

What is the smallest unit of matter?

Back

Atom.

Front

What is the term for a substance made of only one type of atom?

Back

Element.

Front

What is the difference between a mixture and a compound?

Back

A mixture is a physical combination of substances, while a compound is a chemical combination of elements.

Front

What is the term for the center of an atom?

Back

Nucleus.