This Grade 5 gravity worksheet uses sentence correction, fill-in-the-blank, and short answer questions to compare weight on Earth, Mars, and the Moon. Students practice the rule that a 100-pound child weighs about 38 pounds on Mars and 17 pounds on the Moon while mass stays the same. The activity reinforces NGSS 5-PS2-1 ideas in a clear and friendly Grade 5 format.
Style:
Gravity
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
A student that weighs 100 pounds on Earth weighs 100 pound on Mars too.
Rewrite: A student who weighs 100 pounds on Earth weighs only 38 pounds on Mars.
2. Fix the sentence:
On the Moon, a 100-pound child weigh almost the same as on Earth.
Rewrite: On the Moon, a 100-pound child weighs only about 17 pounds.
3. Fix the sentence:
Mass and weight is the same thing on every planet you visit.
Rewrite: Mass stays the same everywhere, but weight changes with each planet's gravity.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. A 100-pound student on Earth would weigh about 38 pounds on Mars.
2. On the Moon, that same 100-pound student would weigh close to 17 pounds.
3. The amount of matter in your body is called your mass.
4. Gravity always pulls objects toward the center of a planet, an action called attraction.
Part C: Short Answer
Answer each question in one or two complete sentences.
1. Why does an astronaut weigh less on the Moon than on Earth?
The Moon has much less mass than Earth, so its gravity is weaker. Weaker gravity pulls on the astronaut with less force, making the astronaut weigh about one-sixth of Earth weight.
2. Explain how a 100-pound Grade 5 student would feel on Mars compared to Earth.
On Mars the student would weigh only about 38 pounds, so jumping and lifting things would feel much easier. Mars gravity is weaker than Earth gravity, but it still pulls the student down.
Gravity
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
A student that weighs 100 pounds on Earth weighs 100 pound on Mars too.
Rewrite: A student who weighs 100 pounds on Earth weighs only 38 pounds on Mars.
2) Fix the sentence:
On the Moon, a 100-pound child weigh almost the same as on Earth.
Rewrite: On the Moon, a 100-pound child weighs only about 17 pounds.
3) Fix the sentence:
Mass and weight is the same thing on every planet you visit.
Rewrite: Mass stays the same everywhere, but weight changes with each planet's gravity.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) A 100-pound student on Earth would weigh about 38 pounds on Mars.
2) On the Moon, that same 100-pound student would weigh close to 17 pounds.
3) The amount of matter in your body is called your mass.
4) Gravity always pulls objects toward the center of a planet, an action called attraction.
★ Part C: Short Answer
Answer each question in one or two complete sentences.
1) Why does an astronaut weigh less on the Moon than on Earth?
The Moon has much less mass than Earth, so its gravity is weaker. Weaker gravity pulls on the astronaut with less force, making the astronaut weigh about one-sixth of Earth weight.
2) Explain how a 100-pound Grade 5 student would feel on Mars compared to Earth.
On Mars the student would weigh only about 38 pounds, so jumping and lifting things would feel much easier. Mars gravity is weaker than Earth gravity, but it still pulls the student down.
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9 Questions
15-20 minutes
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