EV3 Level2

Why do apples fall from trees?

• The wind blows them down.

• Gravity pulls them toward the ground.

• The tree lets them go.

• They are too heavy to stay up.

What helps flowers grow?

• Water, sunlight, and soil.

• Rocks and wind.

• Sand and shadows.

• Snow and ice.

Which part of a flower makes seeds?

• Petals.

• Stem.

• Pistil.

• Leaves.

What happens when two gears are connected?

• They make noise.

• They change color.

• They spin together.

• They stop moving.

What happens when a big gear turns a small gear?

• The small gear spins slower.

• The small gear spins faster.

• The small gear stops.

• The small gear turns the same way.

What is the First Law of Motion?

• Objects move faster when you push them harder.

• Heavy things fall faster than light things.

• Everything moves in a circle.

• Objects stay still or keep moving unless something changes that.

How do birds fly?

• By flapping their wings and using air to lift them.

• By jumping very high.

• By running fast.

• By using jetpacks.

What helps birds stay in the air?

• Their feet.

• Their beaks.

• Their tails only.

• Their feathers and wings.

What does “degree of freedom” mean in robots?

• How fast a robot can move.

• The different ways a robot can move.

• The color of the robot’s parts.

• How strong a robot is.

A robot arm can move up and down and side to side. How many degrees of freedom does it have?

• 1

• 2

• 3

• 4