Science NCFE Review

A dog runs for 2 seconds without stopping.  After 1 second, the dog travels 6 meters.  By the end of the next second, the dog has traveled an additional 4 meters.  Which best describes the motion of the dog during the two seconds? 7.P.1.1

• The dog slows down.
• The dog speeds up.
• The dog moves with a constant speed.
• The dog changes directions.

Which best describes how forces must interact for a kite to sail up into the air? 7.P.1.2

• The force of gravity must be equal to the force of the wind.
• The force of gravity must be greater than the force of the wind.
• The force of the wind must be greater than the force of gravity.
• The force of the person flying the kite must be equal to the force of the wind.

If the motion of an object increased, which type of mechanical energy was gained by the object? 7.P.2.1

• chemical energy
• gravitational potential energy
• kinetic energy
• electromagnetic energy

Which statement is true about the work done in lifting a box? 7.P.2.3

• Energy is transferred to the box from the lifter.
• Energy is transferred to the lifter from the box.
• The energy of the box remains constant.
• The energy of the lifter remains constant.

Simple Machine 1 is determined to have a greater mechanical advantage than Simple Machine 2  when moving an object.  What can be concluded from this statement? 7.P.2.4

• Simple Machine 1 can move the object further than Simple Machine 2 can.
• Simple Machine 1 can lift heavier objects further than Simple Machine 2.
• Simple Machine 1 uses more force to move the object than does Simple Machine 2.
• Simple Machine 1 uses less force to move the object than does Simple Machine 2.

Why is the Mesosphere colder than the Troposphere? 7.E.1.1

• Because the Mesosphere is closer to the ground.
• Because the Mesosphere contains ozone.
• Because the molecules in the Mesosphere are spaced farther apart.
• Because the molecules of the Troposhpere are spaced farther apart.

Which statement is false when a cold front collides with a warm front? 7.E.1.3

• The front would stop, and the temperature would drop.
• The cold front would force the warm air mass upward producing thunderstorms.
• The warm air would move overtop of the cold air producing light rain showers.
• The cold air would push the warm air further to the south.

How do materials move in and out of plant cells and animal cells? 7.L.1.2

• Plant cells and animal cells have cilia.
• Plant cells and animal cells have a cell wall.
• Plant cells and animal cells have a flagella.
• Plant cells and animal cells have a cell membrane.

How do the lungs function within the excretory system? 7.L.1.4

• The lungs exchange oxygen and carbon monoxide.
• The lungs absorb carbon dioxide from the air.
• The lungs help to release carbon dioxide while absorbing nutrients.
• The lungs exchange oxygen and carbon dioxide and release waste products in cells.

What is most likely occurring if the land temperature near the beach is rising more rapidly than the ocean temperature? 7.E.1.4

•  A low pressure air mass is forming over the land while a high pressure air mass is forming over the ocean.
• Differences in air pressure over land and ocean are causing a sea breeze to occur.
• A land breeze is forming and wind speed and direction is changing.
• The humidity is increasing because more condensation is occurring over land.