Science TEKS 5B and 5C

What determines the length of an Earth day?

• Earth`s tilt

• an orbit

• The moon

• a rotation

The girl in the picture has a model that is used to study one of Earth’s cycles.

Which cycle seen on Earth is the girl studying with this model?

• day and night

• the four seasons

• low tide and high tide

• the moon phases

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NGSS.MS-ESS1-1

Which term describes the force that pulls all objects towards Earth`s center?

• friction

• gravity

• buoyancy

• weight

A sign makes a shadow on the playground. Mary drew the shadow at 2:00 p.m. and 4:00 p.m.

Which of these explains the differences in the shadow at these two times?

• As Earth gets closer to the sun, shadows become shorter.

• The distance between Earth and the sun changes during the day.

• The angle between the sun and the signpost changes during the day.

• As the sun gets brighter, the size of the shadow made by the signpost increases.

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Kelly launches her toy rocket straight up into the air on a day that is not windy. How will gravity affect the toy rocket?

• Gravity will push the toy rocket up into space.

• Gravity will make the toy rocket fly level to the ground.

• Gravity will have no effect on the movement of the toy rocket.

• Gravity will pull the toy rocket down toward the center of Earth.

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NGSS.MS-PS2-4

The diagram shows Earth spinning on its axis.

What would happen if Earth spun on its axis faster than it does now?

• Earth would be hotter.

• A day would be shorter than 24 hours.

• A year would be longer than 365 days.

• There would be more than four seasons.

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Selena and Tony are in a lighthouse looking out toward the ocean. They see the top of a sailboat on the horizon. Tony walks down to the ocean shore. Selena remains in the lighthouse. What will Selena or Tony see of the boat after 5 minutes?

• Tony will not see the sailboat because the ocean is higher than the land.

• Tony will see all of the sailboat because his view is closer to the flat ground.

• Selena will not see the sailboat because she is higher off the ground and too far away from it.

• Selena will see the sailboat because she is higher off the ground and can see beyond the curve of Earth

Why do the length of shadows change throughout the day?

• because of the revolution of Earth around the sun

• because of the revolution of the moon around Earth

• because of the apparent rising and setting of the sun

• because of the apparent movement of stars in a circle

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Which of these is responsible for the apparent movement of stars in the sky during one night?

• Earth`s tilt

• Earth orbiting the sun

• Sunrise and sunset

• Earth rotating about its axis

The diagram shows the sun at different places in the sky during the summer. Where is the most likely location of the sun at 7:00 a.m.?

• Location 2

• Location 3

• between Locations 1 and 2

• between Locations 2 and 3

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