Bio chapter 2

the two basic components of the physical universe are

• energy and matter

• matter and mass

• energy and life

• power and matter

Pure substances that cannot be broken down into simpler substances by ordinary chemical means are called

• molecules

• protons

• elements

• atoms

anything that occupies space and has mass

• energy

• solid

• liquid

• matter

an atom has all the characteristics of and is the smallest unit of a/an

• compound

• molecule

• element

• chemical bond

The subatomic particles found in the nucleus of an atom are

• electrons and protons

• protons and neutrons

• neutrons and electrons

• protons and neutrinos

an atom having a negative or a positive charge is called a/an

• compound

• proton

• electron

• ion

When put together, an acid and a base neutralize each other forming

• water and pH

• water and salt

• mixtures

• soda and water

A physical change is illustrated by

• boiling water

• mixing sugar and water

• chilling gelatin

• all of these

When the person lights the wick of a kerosene lamp, the energy in the kerosene

• changes from potential to kinetic

• changes from kinetic to potential

• remains kinetic

• remains potential

The smell of a candle spreading through the room is an example of

• activation

• osmosis

• dispersion

• diffusion