CDT Study Set #1 Questions with Detailed
Verified Answers
A container of liquid water was placed in a freezer. After several hours, all of the
liquid water became solid ice. Which statement best describes the change that
occurred in the liquid water? Ans: The movement of the water particles decreased
Which change most likely occurs as liquid water becomes a solid? Ans: The
temperature of the water decreases.
Use the equation below to answer the question. Photosynthesis CO2 + H2 O sunlight
O2 + glucose 1. Kelp is a seaweed that grows in shallow coastal waters and uses
photosynthesis to make its own food. Which substance is a product of photosynthesis?
Ans: glucose
A box is moved past a compass causing the compass needle to move. Which object is
most likely inside the box? Ans: a circuit with a flowing current
Which statement best describes the motion of steam particles as they condense? Ans:
The speed of the particles decreases.
Which statement best describes how electromagnetism is different from gravity? Ans:
Only electromagnetism can attract objects as well as repel objects.
Which statement best explains the mechanical advantage of using a lever to lift a heavy
object? Ans: The lever reduces the force required to lift an object.
Which statement best describes why evaporation is a physical change? Ans: The type
of molecule stays the same.
A student wrapped a wire around a nail. The two ends of the wire were then attached
to a battery. What will happen when the student moves steel paper clips close to the
nail? Ans: The steel paper clips will move toward the nail because electricity flowing
through the wire makes the nail magnetic.
Verified Answers
A container of liquid water was placed in a freezer. After several hours, all of the
liquid water became solid ice. Which statement best describes the change that
occurred in the liquid water? Ans: The movement of the water particles decreased
Which change most likely occurs as liquid water becomes a solid? Ans: The
temperature of the water decreases.
Use the equation below to answer the question. Photosynthesis CO2 + H2 O sunlight
O2 + glucose 1. Kelp is a seaweed that grows in shallow coastal waters and uses
photosynthesis to make its own food. Which substance is a product of photosynthesis?
Ans: glucose
A box is moved past a compass causing the compass needle to move. Which object is
most likely inside the box? Ans: a circuit with a flowing current
Which statement best describes the motion of steam particles as they condense? Ans:
The speed of the particles decreases.
Which statement best describes how electromagnetism is different from gravity? Ans:
Only electromagnetism can attract objects as well as repel objects.
Which statement best explains the mechanical advantage of using a lever to lift a heavy
object? Ans: The lever reduces the force required to lift an object.
Which statement best describes why evaporation is a physical change? Ans: The type
of molecule stays the same.
A student wrapped a wire around a nail. The two ends of the wire were then attached
to a battery. What will happen when the student moves steel paper clips close to the
nail? Ans: The steel paper clips will move toward the nail because electricity flowing
through the wire makes the nail magnetic.
