Science Unit

What is the force that keeps everything on Earth's surface?

• Electricity

• Gravity

• Magnetism

• There isn't one.

Tags

NGSS.MS-ESS2-4

Why do people on opposite sides of the Earth not feel upside down?

• They wake up on the right side of the bed.

• The force of gravity pulls us down and the sky is always up no matter where you are.

• The Earth spins so we eventually feel right side up.

Why do all people on Earth feel as if the Earth is beneath them, regardless of where they are?

• They feel this way because there is a force pulling everything to the center of the Earth.

• The Earth is flat, so they all have the ground below them.

• The wind pushes them down.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Which of the following could you do to demonstrate to someone why Earth appears flat?

• Have the person hold a golf ball in front of his or her face and look across the top of the ball.

• Have a person hold a marble in front of his or her face and look across the top of it.

• Have the person hold a large beach ball in front of his or her face and look across the top of the ball.

• Have the person hold a baseball in front of his or her face and look across the top of the ball.

Which of the following is evidence that Earth is a sphere? Choose all that apply.

• Higher elevations allow you to see around the curve of Earth's horizon.

• You see only the top part of a ship as it sails over the horizon.

• The sun and stars travel across the sky from east to west.

Choose the correct answer. You are standing on a beach watching a ship sailing across the ocean. What could you do to be able to watch the shop longer before it disappears over the horizon?

• Walk north across the beach.

• Wade out into the water.

• Climb to the top of a building.

• Lie down and look across the surface of the water.

What is the best definition of "down?"

• The direction towards one feet.

• The direction towards the center of the Earth.

• The direction facing downhill.

The most accurate way to describe an upward direction is to say that "up" is _____________.

• The direction toward the sun.

• The direction away from Earth's center.

• The direction towards your fingers if you hold your arms above your head.

Evidence showing that Earth has a ​ (a)   shape includes the ability to see farther when you climb ​ (b)   .

• round
• up high
• flat
• down low

Which image correctly shows a model of Earth and the direction of the force of gravity?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-5