science grade 4 3rd quarter review

1. A kilo of nails needs more force for it to be lifted than a kilo of cotton balls

• TRUE

• FALSE

2. When you slide a heavy wooden box across a rough floor, it will:

• move a shorter distance

• move a longer distance

• move continuously

• break due to your force

3. Pushing a refrigerator requires less force than pushing a bicycle

• TRUE

• FALSE

4. Speed is the amount of force applied to an object

• TRUE

• FALSE

5. All kinds of materials are magnetic.

• TRUE

• FALSE

6. Nickel is another popular magnetic metal with ferromagnetic properties

• TRUE

• FALSE

7. The strongest part of a magnet is concentrated at the poles.

• TRUE

• FALSE

8. A horseshoe shape is considered the strongest and can be very useful to create if you want to lift heavy objects or want to make a bar magnet stronger because The strongest part of a magnet is concentrated at the poles.

• TRUE

• FALSE

9. The arrows always start at the magnet's north pole and point towards its south pole. When two like-poles point together, the arrows from the two magnets point in OPPOSITE directions and the field lines cannot join up. So the magnets will push apart (repel)

• TRUE

• FALSE

10. ______________ are items with poles and a magnetic field.

• Forces

• Magnets

• speed

• motion