# Name - East Hanover Schools Online ```Name: _________________________________ Date: _____________ Period: ____
Chapters 2 and 3 Test
Test: Wednesday, 10/24
Chapter 2
1. Know the differences between mass and weight
Mass: stays constant, measured in grams, measurement of amount of matter in an
object
Weight: can change, measured in Newtons, measurement of gravitational force
2. Know how to calculate density and know what units to use. Know if something
will float in water.
Density = mass divided by volume
Units: g/cm3 or g/mL
Water has the density of 1.00 g/cm3. If the object is less dense (less than 1) it will float.
3. Know where the densest layer in a graduated cylinder would be.
The densest layer would be at the bottom. The least dense would float on top.
4. Know the physical and chemical properties of matter.
Physical: Solubility, thermal conductivity, malleability, volume, mass, weight, density,
ductility
Chemical: flammability, reactivity
5. Be able to identify a physical change vs. a chemical change. Know at least four
examples of physical changes.
Physical changes: matter retains its identity (ripping, crumpling, freezing, melting,
changing container
Chemical change: permanent change
6. Know the 6 signs of a chemical change.
Gas produced (bubbles), odor, temperature change, permanent color change,
substance disappears, solid is formed
7. Know the procedure for measuring the volume of an irregular solid.
Take a graduated cylinder and fill it with an amount of water, measure the volume of
water.
Place irregular solid in the water and measure the difference. The difference is the
volume of the irregular solid.
Chapter 3
1. Know what has to happen to the particles in a solid to become a liquid; a liquid
to a gas; solid to a gas; liquid to a solid; gas to a liquid
Solid to liquid, liquid to gas, solid to gas  add energy
Liquid to solid, gas to liquid  take away energy
2. Know how atoms/molecules interact.
Atoms and molecules are constantly moving and colliding with each other. They are
also attracted to each other.
3. Be able to discuss why liquids can flow (hint: talk about their particles)
Their particles can slide past each other, unlike in a solid.
4. Know what needs to happen to slow or speed up particles of matter.
You must add energy or increase temperature to speed up particles
You must take away energy or decrease temperature to slow down particles.
5. Know Boyle’s and Charles’ Laws and what they explain.
Boyle’s Law: volume is inversely related to pressure (when one goes up, the other will
decrease)
Charles’ Law: temperature and volume are directly related (when one increase, the
other will also increase)
6. Know the relationship between the volume and pressure of a gas.
When the volume increases, the pressure decreases. When the volume decreases, the
pressure increases.
7. USE NOTES, VOCABULARY, HOMEWORK, DO NOWS and LABS to study!
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