Covalent network crystals contain what?
A. The melting point of molecular crystals is higher than that of ordinand molecular crystals.
B. The melting point of molecular crystals is lower than that of other molecular crystals.
C. It is a discrete molecule linked through Vander Waals forces.
D. hydrogen bonding
The discharge tube’s created glow is the color:
A. It depends on the pressure in the discharge tube.
B. It depends on the metal used as an anode.
C. Depends on the gas used in the discharge tube.
D. It does not depend on the nature of the gas used in the discharge tube.
A solution’s concentration can be expressed in one of the following ways without regard to temperature: It is_________
A. Molarity
B. Molality
C. Normality
D. Formality
A chemical that boosts a catalyst’s effectiveness is referred to as:
A. Promoter
B. Activator
C. Retarder
D. Super catalyst
The amount of energy needed by kids between the ages of one and three is
A. 300 kilocalories
B. Calories
C. 900 kcal
D. 1200 kcal/day
What does “equinox” mean?
A. The longest day
B. The shortest day
C. The month-long day of the sun
D. Equal duration of day and night
How many minutes’ time difference does the longitude distance represent?
A. 10 minutes
B. 4 minutes
C. 15 minutes
D. 1 minute
Because of what does the season change?
A. The moon is revolving around the Earth.
B. The Earth is revolving around its axis.
C. Earth is revolving around the sun.
D. The sun is drawn to the planet Mars.
What is a wind that seasonally reverses called?
A. Trade
B. Cyclonic
C. Monsoon
D. Polar
A canyon is a significant example of what?
A. Dry Valley
B. Gorge
C. Pediment
D. Badland