STATES OF MATTER
Which state of matter has a definite shape and a definite volume?
A. Solid
B. Liquid
C. Gas
D. Plasma
A. Solid
QUESTION
Which three things make up the fire triangle?
A. Heat, fuel, and oxygen
B. Smoke, water, and heat
C. Fuel, ash, and carbon dioxide
D. Oxygen, water, and smoke
ANSWER
A. Heat, fuel, and oxygen
QUESTION
What does temperature measure?
A. The total number of particles
B. The average kinetic energy of particles
C. The mass of an object
D. The color of an object
ANSWER
B. The average kinetic energy of particles
QUESTION
Agree or disagree: Scientists should record observations before writing explanations.
ANSWER
Agree
What subject was Dr Jacob’s bachelor’s degree in?
A. Chemistry
B. Biology
C. Physics
D. Mathematics
B. Biology
Agree or disagree: Particles in a gas move freely and spread throughout their container.
ANSWER
Agree
QUESTION
Yes or no: A fire can continue if one part of the fire triangle is removed.
ANSWER
No
Which formula calculates the energy absorbed by water?
A. q = m × c × ΔT
B. q = m ÷ c
C. q = Tfinal + Tinitial
D. q = mass × volume
ANSWER
A. q = m × c × ΔT
Which statement is an observation?
A. The fire was intentionally started
B. The floor near the bed had deep damage
C. The suspect caused the fire
D. The investigator’s first idea was correct
ANSWER
B. The floor near the bed had deep damage
Which soccer club is Dr Jacob’s favorite team?
A. Chelsea
B. Liverpool
C. Arsenal
D. Manchester City
C. Arsenal
Which change of state occurs when a liquid becomes a gas?
A. Freezing
B. Condensation
C. Vaporization
D. Melting
ANSWER
C. Vaporization
Hot air and smoke rising above a flame provide an example of which type of energy transfer?
A. Conduction
B. Convection
C. Radiation
D. Freezing
ANSWER
B. Convection
QUESTION
How do you calculate temperature change?
A. Initial temperature minus final temperature
B. Final temperature minus initial temperature
C. Final temperature plus initial temperature
D. Mass divided by temperature
ANSWER
B. Final temperature minus initial temperature
QUESTION
Which statement is a scientific claim?
A. The thermometer read 42°C
B. The floor was black
C. The evidence suggests the fire began near the heater
D. Smoke was visible near the ceiling
ANSWER
C. The evidence suggests the fire began near the heater
Which martial arts rank has Dr Jacob earned?
A. Yellow belt in judo
B. Green belt in karate
C. Black belt in karate
D. Blue belt in taekwondo
ANSWER
B. Green belt in karate
QUESTION
A cold drink develops water droplets on the outside of its cup. What happened?
A. Water leaked through the cup
B. Water vapor condensed
C. The cup created new water
D. The liquid inside boiled
ANSWER
B. Water vapor condensed
QUESTION
You can feel a fire’s energy from the side without touching the fire. Which type of transfer explains this?
A. Conduction
B. Convection
C. Radiation
D. Condensation
ANSWER
C. Radiation
A candle heats water from 24°C to 42°C. What is the water’s temperature change?
A. 8°C
B. 18°C
C. 28°C
D. 48°C
ANSWER
B. 18°C
QUESTION
Why should investigators compare several pieces of evidence?
A. One observation may have more than one explanation
B. Evidence is never useful
C. The first idea is always correct
D. More evidence makes a fire hotter
A. One observation may have more than one explanation
Which pet does Dr Jacob have?
A. A bird
B. A dog
C. A rabbit
D. A cat
D. A cat
QUESTION
Two samples of water have the same temperature. One sample contains 50 mL, and the other contains 500 mL. Which sample usually has more total thermal energy?
A. The 50 mL sample
B. The 500 mL sample
C. They must have equal thermal energy
D. Temperature cannot be measured
ANSWER
B. The 500 mL sample
QUESTION
Investigators find heavy smoke damage in one room. Does this evidence automatically prove that the fire started in that room?
A. Yes, smoke always stays at the origin
B. Yes, the darkest room must be the origin
C. No, hot gases and smoke can travel
D. No, smoke is never useful evidence
ANSWER
C. No, hot gases and smoke can travel
QUESTION
A candle and a Bunsen burner heat equal masses of water for equal times. The Bunsen burner produces the larger temperature increase. Which conclusion is best supported?
A. The Bunsen burner transferred more energy to the water
B. The candle created more water
C. The Bunsen burner had less energy
D. The water stopped having particles
ANSWER
A. The Bunsen burner transferred more energy to the water
An investigator changes a conclusion after receiving new evidence. Is this good scientific practice?
A. No, conclusions can never change
B. No, the first prediction must remain
C. Yes, conclusions should respond to evidence
D. Yes, but only if the teacher gives the answer
ANSWER
C. Yes, conclusions should respond to evidence
How old was Dr Jacob when Dr Jacob learned to drive?
A. 16
B. 21
C. 30
D. 31
ANSWER
D. 30