Matter and Its Properties
Density & Measurements
States of Matter & Phase Changes
Temperature & Energy
Mixtures & Pure Substances
Scientific Calculations
Real-World Applications
100
What is the phase of matter that has a definite volume but takes the shape of its container?
Liquid
100
What is the formula for density?
Density = Mass/Volume
100
What phase of matter has the lowest kinetic energy?
Solid
100
What temperature scale is most commonly used in science?
Celsius
100
What type of mixture is salt water?
Mixture or Solution
(100 Extra pts for homogeneous)
100
What is the formula for weight?
(Weight = Mass × Gravity)
100
What temperature scale is used for weather reports in the U.S.?
Fahrenheit
200
What is the term for the amount of space occupied by an object?
Volume
200
An object has a mass of 40 g and a volume of 80 cm³. What is its density?
0.5 g/cm³
200
What is the freezing point of water in Celsius?
0°C
200
Convert 25°C to Kelvin.
298 K
200
What type of substance is carbon dioxide?
Pure and Compound
200
Becky has a mass of 30 kg. What is her weight on Earth if gravity is 10 m/s²?
300 N
200
Why do ice cubes float in a glass of water?
Ice cubes are less dense than liquid water.
300
What type of change occurs when a yellow, cloudy substance forms after mixing two clear liquids?
Chemical Change; Precipitate Formation
300
If the density of a solid is 0.25 g/cm³, what is the mass of 40 cm³ of this solid?
10 g
300
On a heating curve, what does a plateau represent?
Phase Change
300
Convert 100°C to Fahrenheit.
212°F
300
What type of mixture has particles that do not settle but are evenly distributed?
Colloid
300
Anastasia weighs 500 N on Earth. What is her weight on Jupiter if gravity is 26 m/s²?
1300 N
300
How does a hot air balloon rise?
Heating the air inside the balloon decreases its density.
400
A rusting bicycle is an example of what type of change?
Chemical Change
400
Two samples of pure gold have different volumes. Do they have the same density?
Use an example from class (or lab) to support your answer
Yes, density is an intrinsic property.
400
What phase change requires an absorption of energy?
Melting
400
What happens to the kinetic energy of particles as temperature increases?
The kinetic energy of particles increases as temperature rises.
400
A solution is always ___________ (homogeneous or heterogeneous)?
Homogeneous
400
How do you calculate percent error in an experiment?
Measured Value - Theoretical Value) / Theoretical Value × 100%)
400
Why does sweating cool you down?
Evaporation absorbs heat energy.
500
Which phase of matter is characterized by charged particles and extremely high temperatures?
Plasma
500
What measurement tool is best used to determine the volume of an irregularly shaped object?
Graduated Cylinder with Water Displacement Method
500
What phase change happens when a solid turns directly into a gas?
Sublimation
500
If a heating curve shows kinetic energy changing, what is happening?
The temperature is increasing.
500
Draw and describe a heterogeneous mixture at the microscopic level.
500
Using the graph, identify in which section kinetic energy is highest.
Gas
500
How do submarines use density to rise and sink?
Because of buoyancy—ships are designed with hollow spaces filled with air, which decreases their overall density to be less than water.