Science 8 Fall Semester 1.07 Quiz Review

Which of the following is the best example of a proper hypothesis?

• Orange popsicles taste sweeter than grape popsicles.
• Children who wear backpacks do better academically.
• If two objects are dropped at the same height, the heavier object will hit the ground first.
• I think there is no effect on hearing if you listen to loud music only three hours a day.

Which of the following is the best example of a proper hypothesis?

• Grapes taste better than apples because grapes are sweeter.
• Water will flow faster through tightly packed soil than through loosely packed soil.
• If different types of leaves are exposed to low temperatures, then they will change colors.
• A proper hypothesis includes independent and dependent variables of the experiment and is written as a testable statement.

James took two pea plants, placing one in a dark closet and the other on a sunny window sill. Both are located in air-conditioned rooms. He then measured the growth of the pea plants after a week. In this experiment, the dark closet is a(n)

• control
• dependent variable
• constant
• independent variable

James took two pea plants, placing one in a dark closet and the other on a sunny window sill. Both are located in air-conditioned rooms. He then measured the growth of the pea plants after a week. In this experiment, sunlight is a(n)

• independent variable
• dependent variable
• constant
• control

James took two pea plants, placing one in a dark closet and the other on a sunny window sill. Both are located in air-conditioned rooms. He then measured the growth of the pea plants after a week. The growth of pea plants in this experiment is a(n)

• independent variable
• dependent variable
• constant
• control

Kate gathered three boxes of the same size made of different materials: glass, clear plastic, and aluminum painted black. She placed them on a window sill in the sun for an hour and then measured the warmth of the air in each box. In this experiment, the types of box materials are a(n)

• independent variable
• dependent variable
• constant
• control

Kate gathered three boxes of the same size made of different materials: glass, clear plastic, and aluminum painted black. She placed them on a window sill in the sun for an hour and then measured the warmth of the air in each box.  In this experiment, the time of an hour is a(n)

• independent variable
• dependent variable
• constant
• control

Kate gathered three boxes of the same size made of different materials: glass, clear plastic, and aluminum painted black. She placed them on a window sill in the sun for an hour and then measured the warmth of the air in each box. In this experiment, the warmth of the air is a(n)

• independent variable
• dependent variable
• constant
• control

Kate gathered three boxes of the same size made of different materials: glass, clear plastic, and aluminum painted black. She placed them on a window sill in the sun for an hour and then measured the warmth of the air in each box. Which of the following best describes the purpose of the experiment?

• to relate the type of box material to the warmth of air within the box
• to relate the type of box material to the mass of the box
• to relate the size of the box to the warmth of air within the box
• to relate the amount of time a box is exposed to sunlight to the warmth of air within the box

James took two pea plants, placing one in a dark closet and the other on a sunny window sill. Both are located in air-conditioned rooms. He then measured the growth of the pea plants after a week. Which of the following best describes the purpose of this experiment?

• to determine the effect of air conditioning on plant growth
• to determine the effect of enclosed spaces on plant growth
• to determine the effect of sunlight on plant growth
• to determine the effect of lack of water on plant growth