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What is matter?

Anything that occupies space

What are the two standard units of measurement scientist use to measure matter?

metric system and Customary System

Examples of Metric?

cm,m,dm,km

Examples of Customary System?

in, ft, yd

What is the difference between mass and weight of an object?

Mass is the amount of matter the object has and weight is the pull of gravity on an object.

Examples of measuring mass?

g, kg, mg

Examples of measuring weight?

oz, lb, Ton

Physical Change

The physical properties vary but they are still the same substance

Chemical Change

one form of matter changes into another

Example of physical Change

two rocks grinding together and spit apart

Example of Chemical Change

glow stick, steel wool rusting, formation of stalactite in a cave

What are three states of matter?

solid, liquid, gas

What is a solid?

Molecules are tightly packed so vibrate don't move

What is a liquid?

Molecules are not packed as tightly so move more freely

What is a gas?

Molecules are far apart and bounce off each other

What evidence of a chemical change did you observe in either the steel wool or your glow stick?

Steel wool: changed in texture because the reaction caused it to crumble, reaction caused a new matter
Glow Stick: the hydrogen peroxide in the glass tube reacted with the chemical (phenyl Oxalate Ester)in the plastic tube when you bend the stick which causes the glass tube to break mixing the two chemicals and causing a glowing chemical reaction

What is an atom?

smallest bits of matter

What are three main parts of an atom?

electron, protons, neutrons

What is the charge of a electrons?

negative

What is the charge of a proton?

positive

What is the charge of a neutron?

neutral

When drawing up an atomic model, where are the protons, neutrons , and electrons?

Protons and neutrons are in the middle and electrons circle them on the outside

Groups of atoms are called?

molecules

Pure elements are made of one or more than one types of atom or molecules?

only one kind

If the atoms in molecule are different it is called?

compound

What does the symbol stand for on the periodic chart?

THe short way to write the name of the atom

Carbon and Oxygen become?

Carbon dioxide

Iron and oxygen become?

Iron Oxide

Calcium chloride become?

Calcium + chlorine

Hydrogen iodide become?

Hydrogen + iodine

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