Since Unit Lesson

Which of the following could you do to demonstrate to someone why Earth appears flat? Select the best answer.

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

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

• 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? Select all the answers that apply.

• Higher elevations let you see more of Earth’s surface.

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

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

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

• 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.

The most accurate way to describe what a downward direction means is to say that “down” is the direction _____.

• toward Earth's center

• away from Earth's center

• to the right of Earth's center

The most accurate way to describe what an upward direction means is to say that “up” is the direction

• toward Earth's center

• to the right of Earth's center

• away from Earth's center

Which of the following are true about gravity? Select all the answers that apply.

• Gravity is a force.

• There is no gravity in the Southern Hemisphere.

• Gravity affects all matter on Earth.

• Gravity is caused by air pushing down on things.

Tags

NGSS.5-PS2-1

Evidence that shows that Earth is _____

includes the ability to see farther when you ____.

• round, climb down low

• round, climb up high

• flat, climb down low

• flat, climb up high

Which image correctly shows a model of Earth and the direction of the force of gravity? Select the best answer.

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Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5