Chemistry
Which of the following is a compound?
A. Cl
B. Ag
C. NaOH
D. Sc
C. NaOH
What type of change occurs when an egg is scrambled?
A. Physical change only
B. Chemical change only
C. Both chemical and physical change
D. Neither chemical nor physical change
C. Both chemical and physical change
What causes ocean basins to form at tectonic plate boundaries?
<---------Ocean--------->
A. Plate collision
B. Plate separation
C. Erosion
D. Deposition
B. Plate separation
In hydra budding, how does the offspring compare to the parent?
Hydra reproduce asexually through budding. a processing which a bud breaks off an adult hydra and floats away.
A. Has different genes
B. Is genetically identical
C. Has half the genes
D. Has mixed genes
B. Is genetically identical
Explain Distance vs Time graph what is happening when a graph looks like the following:
-----------------------------------
Not moving, Distance stays the same, speed is 0
What is the best definition of an element?
A. A substance made of two different types of atoms
B. A substance made of one type of atom only
C. A mixture of different compounds
D. A solution of different substances
B. A substance made of one type of atom only
In a salt water solution, what is the solvent?
A. Salt
B. Water
C. The mixture
D. The container
B. Water
What best describes crust formation at divergent boundaries?
A. Crust is destroyed
B. Crust is created
C. Crust remains unchanged
D. Crust melts completely
B. Crust is created
How is energy handled in ecosystems?
A. It is recycled completely
B. It flows in one direction
C. It is stored permanently
D. It moves randomly
B. It flows in one direction
Explain what is happening when a graph looks like
/
Moving away from start, Increasing distance, constant speed.
In the chemical formula C₂H₃O₂, how many total atoms are present?
A. 5
B. 3
C. 7
D. 4
C. 7
On a frictionless surface, what happens to a moving ball when pushing stops?
A. It stops immediately
B. It continues at constant speed
C. It speeds up
D. It changes direction
B. It continues at constant speed
What is the main cause of water pollution in lakes far from cities?
A. Direct dumping
B. Runoff
C. Rain
D. Evaporation
B. Runoff
Which best describes watershed contamination?
A. Through evaporation
B. Through surface runoff
C. Through precipitation
D. Through wind
B. Through surface runoff
What causes harmful algae blooms in lakes?
A. Agricultural runoff
B. Oil spills
C. Overfishing
D. Natural causes
A. Agricultural runoff
Which formula is correct?
Sodium 1 Hydrogen 1
Nitrogen 3 Oxygen 3
A. NaHN₃O₃
B. MgN₃O₃
C. NaCl
D. FeMO₃
A. NaHN₃O₃
How do you calculate average speed?
A. Distance × Time
B. Distance ÷ Time
C. Time ÷ Distance
D. Time × Distance B. Distance ÷ Time
B. Distance ÷ Time
What causes harmful algae blooms in lakes?
A. Agricultural runoff
B. Oil spills
C. Overfishing
D. Natural causes
A. Agricultural runoff
What is the main cause of water pollution in lakes far from cities?
A. Direct dumping
B. Runoff
C. Rain
D. Evaporation
B. Runoff
How is energy handled in ecosystems?
A. It is recycled completely
B. It flows in one direction
C. It is stored permanently
D. It moves randomly
B. It flows in one direction
Which represents a chemical change?
A. Ice melting
B. Wood burning
C. Sugar dissolving
D. Water evaporating
B. Wood burning
What is net force?
A. The largest force only
B. The sum of all forces in all directions
C. The smallest force only
D. The average of all forces
B. The sum of all forces in all directions
What is Subduction Zone, and how does the plate boundaries look like.
When the plate are going colliding and one plate goes underneath another plate
What happens to salt's solubility as temperature increases?
A. Decreases steadily
B. Remains constant
C. Increases steadily
D. Fluctuates randomly
C. Increases steadily
Explain the following graph.
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Moving towards the start, Decreasing distance, constant speed.