Physical & Chemical Properties
The ability of an object to resist being scratched.
Hardness
A brick wall is _______ because it blocks all light from passing through it. ( Translucent/ Opaque )
Opaque
It is a measure of the mass of a substance per unit volume.
Density
Elements that are good conductors of heat and electricity are called......... ( Ductile / metal? )
Metal
Classify the following questions as either chemical or physical properties: Question: Burns in air
Chemical
Degradation of a metal due to a reaction with its environment.
Corrosion
Wax paper or a frosted window allows some light to pass through, but you cannot see clearly through it. This is called _______.
Translucence
The property of a substance that enables it to change its length, volume, or shape and to recover its original...
Elasticity
Are car keys insulator or conductor?
Conductor
Anything that takes up space and has mass is the definition of _________.
Matter
Classify the following questions as either chemical or physical CHANGES: Question: Mixing vinegar and baking soda to generate bubbles
Chemical Change
Put a pencil in a glass of water. It will appear bent or shifted at the surface. It is because of
Reflection or Refraction?
Refraction
What strength of steel wire rope indicates how much force a rope can handle before breaking.
Tensile strength
Which is not an insulator? Steel or wool?
Steel
Which of the following is a mixture?
Air
Salt
Water
Sulfur
Air
Which of the following is a physical change?
a. Melting ice cubes
b. Burning paper
c. Rusting iron
a. Melting ice cubes
Reflection
Which is the highest thermal conductive material?
Diamond
Material that can be pulled into long wires is considered to be _______?
(Malleable/ Ductile )
Ductile
Which measurement would be different if you were on the Moon versus on Earth?
Mass or Weight?
Weight
Describe how the particles are arranged in a solid, liquid, and gas.
Solid: __________
Liquid: _________
Gas: ___________
Solid: Particles are tightly packed
Liquid: Particles are close together but can slide past each other.
Gas: Particles are far apart and move freely in all directions
A road often has reflectors in the middle to help people see the center line. How does the reflectors work?
1. It refracts light rays
2. It bounces light back
3. It absorbs light shined on it
It bounces light back
Steel is often used in buildings because it has high
1. Strength to mass ratio
2. Strength to weight ratio
Strength to weight ratio
Why are insulators important in an electrical circuit?
1. They make the circuit safe to touch
2. Electricity will only flow through insulators
1. They make the circuit safe to touch
Calculate the density of a rock that has a mass of 454g and a volume of 100 cubic centimeters.
4.54g/ml