Grade 7 Science: Structures: Form and Function

When Jeremy Hansen travels from Earth to the Moon, which of the following changes due to the difference in gravity pull?

• Mass

• Weight

• Pounds

• Balance

Torsion force is

• Pulling
• Compression
• Twisting
• Bend or pull in opposite directions

Tension force is

• Pulling
• Compression
• Twisting
• Bend or pull in opposite directions

Tension stress can be useful. How?

• Reduces stress
• Crushing a pop can
• Strings on a guitar play music
• Increases stress

Beams are improved by:

• Making an I or L shape inside

• Having less of them when possible

• Putting them only outside the building

• Beams cannot be improved

_____ is the point that gravity acts on. 

• Base point
• Checkpoint
• Weight of gravity
• Center of gravity

A structure that resists falling over is said to be ________________.

• Aesthetic

• Cost efficient

• Stable

• Design flawed

In order for a structure to be stable, the center of gravity must be...

• high
• low
• in the middle
• on the outside

Which of the following shapes is the strongest?

• triangle
• square
• arch
• ovals

If you are making a container to hold something, you would want a ________ structure.

• Frame
• solid
• shell
• combination