Science 6 Quarter Exam

Joy is cleaning outside when she suddenly heard her cellular phone ringing repeatedly. She rushed inside their house and answered it immediately, realizing her mom is calling. When Joy uses her cell phone, what form of energy is the stored energy in the battery transformed into?

• Chemical Energy

• Electrical Energy

• Light Energy

• Nuclear Energy

You need to open a jar of pickles that is very tightly sealed. Comparing the safety and practicality of using a jar opener versus a rubber band and a cloth, which statement is most accurate?

• A jar opener is generally safer and more practical for this task because it provides a better grip and leverage.

• Using a rubber band and a cloth is generally safer and more practical for this task because it requires less effort and is more readily available.

• Both methods offer comparable safety and practicality for this task, depending on the size and shape of the jar.

• Neither method is suitable for opening a tightly sealed jar; you need to ask someone stronger.

You need to move a heavy box across your garage floor. Comparing using a wheelbarrow to using a long

You need to move a heavy box across your garage floor. Comparing using a wheelbarrow to using a long board as a lever, which statement is most accurate?

• A wheelbarrow is better for moving the box a long distance because it reduces the effort needed for continuous movement.

• A long board (lever) is better for short distances and provides more control for precise positioning.

• Both methods offer similar advantages for moving the box across the garage.

• Neither method is suitable for moving a heavy box; you should ask for help.

You need to move a heavy piece of furniture (like a couch) up a set of stairs in your house. Which combination of simple machines would be most effective for both moving and securing the furniture?

• Use a pulley system to lift the furniture and then a wedge to secure it in place.

• Use a ramp (inclined plane) to move the furniture up the stairs and then a trolly (wheel and axle) to maneuver it into position.

• Use a lever to lift the furniture and then a screw to secure it to the floor.

• Use a wedge to help move the furniture up the stairs and then a pulley system to lift it into place.

Xena wants to reduce friction on the ramp to make it easier for materials to slide down. Which material should she use to cover the surface of the ramp?

• Carpet

• Polished metal

• Rubber

• Sandpaper

Compare the effects of gravity on a heavy object and a light object sliding down the same ramp. Which statement is correct?

• Gravity will pull the heavy object down the ramp faster than the light object.

• Gravity will pull both objects down the ramp at the same rate, but friction may affect them differently.

• The light object will slide down faster due to less gravitational pull.

• Both objects will remain stationary due to friction.

Evaluate the effectiveness of adding wheels to the materials being transported down the ramp. How would this modification impact the effects of friction and gravity?

• Adding wheels would increase friction and slow down the materials.

• Adding wheels would reduce friction and allow gravity to pull the materials down more smoothly and quickly.

• Adding wheels would negate the effects of gravity.

• Adding wheels would have no impact on friction or gravity.

Compare the effects of friction on a car traveling on a dry road versus on a wet road. Which statement is correct?

• Friction is greater on a wet road due to increased surface contact.

• Friction is less on a wet road due to reduced surface contact.

• Friction remains the same regardless of road conditions.

• Friction does not affect the movement of a car.

Compare the effects of incline angle on the motion of sliding objects. Which statement is correct?

• Objects slide faster on steeper inclines due to increased friction.

• Objects slide slower on steeper inclines due to increased gravitational force.

• The incline angle does not affect the speed of sliding objects.

• Objects slide at the same speed regardless of the incline angle.