ôn tập cháu sâu

Pushes and pulls are examples of forces.

• True

• False

Force cannot start or stop things moving and cannot make objects move faster or slower.

• True

• False

Objects move ________on a rough surface.

• faster

• slower

• higher

• lower

When friction is happened?

• It happens when two

  surfaces rub together.

• It happens when two

  surfaces push together.

• It happens when two

  surfaces pull together.

Magnetism is a _________ force

• non-contact

• contact

What is the function of skeleton?

• The skeleton supports our bodies

• Helps us move.

• protects important organs inside our bodies.

• Helps us to grow

Arms and legs have __________single bone.

• more than one

• only one

• no

• three

Why magnet can move the coin?

• because the

  coin is magnetic.

• because the

  coin is rub together

• because the

  coin can repel magnetic.

humerus và ulna là xương ở đâu?

• Tay

• Chân

• cột sống

femur and tibia là xương ở đâu

• tay

• chân

• cột sống