SCIENCE Reviewer

Which force pulls objects toward the center of the Earth?

• Thrust

• Gravity

• Friction

• Drag

What does the formula w=m×g calculate?

• Speed

• Power

• Weight

• Work

Which force resists motion when two surfaces are in contact?

• Gravity

• Inertia

• Friction

• Thrust

Which of the following can decrease friction?

• Sandpaper

• Oil

• Rough surface

• Rubber mat

Which combination of forces helps an airplane stay in the air?

• Gravity and Friction

• Lift and Drag

• Lift, Gravity, Thrust, Drag

• Thrust and Inertia

What is energy?

• The ability to grow

• The ability to do work

• The speed of an object

• The weight of an object

What kind of energy does food contain?

• Light

• Chemical

• Mechanical

• Thermal

Which of the following is an example of energy transformation?

• A book on a table

• A moving car stops

• A flashlight turning chemical energy to light

• A mirror reflecting light

Which device transforms electrical energy into sound?

• Toaster

• Speaker

• Refrigerator

• Blender

A solar panel changes sunlight into what kind of energy?

• Chemical

• Electrical

• Mechanical

• Magnetic