Look at the 3-D objects and answer the questions.

Here are the answers to the questions about 3-D objects:

What determines whether an object will roll or slide?
An object's ability to roll or slide is determined by its surfaces. Objects with curved surfaces tend to roll, while objects with flat surfaces tend to slide. Objects with both flat and curved surfaces can both roll and slide.

1. Look at the 3-D objects and answer the questions.

• a)

  • i. Name this object.
    • Answer: $\boxed{\text{Sphere}}$
  • ii. Does it have a flat or curved surface?
    • Answer: $\boxed{\text{Curved surface}}$
  • iii. Can a 3-D object with a curved surface roll or slide?
    • Answer: $\boxed{\text{Roll}}$

• b)

  • i. Name the objects.
    • Answer: $\boxed{\text{Cubes and Square-based pyramid}}$
  • ii. Do they have flat or curved surfaces?
    • Answer: $\boxed{\text{Flat surfaces}}$
  • iii. Can a 3-D object with a flat surface roll or slide?
    • Answer: $\boxed{\text{Slide}}$

• c)

  • i. Name the objects.
    • Answer: $\boxed{\text{Cone and Cylinders}}$
  • ii. Do they have flat or curved surfaces?
    • Answer: $\boxed{\text{Flat and curved surfaces}}$
  • iii. Can a 3-D object with a curved and flat surface roll or slide?
    • Answer: $\boxed{\text{Roll and slide}}$

Match the words with the objects:

• Rectangular prism: First object (left)
• Sphere: Second object
• Cylinder: Third object
• Square-based pyramid: Fourth object
• Cone: Fifth object (right)