What makes the pull of gravity stronger or weaker

Grade 6 Science Worksheet - Building Confidence

Circle the best answer.

1. 1.

   Ari wonders which objects pull on each other with gravity. Which answer is right?

   • Every pair of objects with mass, even two balls
   • Objects pull only when they touch
   • Only Earth pulls on things
   • Only very big objects pull, like planets and stars
2. 2.

   An apple falls from a tree toward Earth. Does the apple pull on Earth too, by Bo's notes?

   • Yes, and the apple pulls harder on Earth than Earth pulls
   • Yes, with an equal pull; Earth just barely moves
   • No; apples have no mass
   • No; just Earth does the pulling
3. 3.

   Is there any gravity out where the Moon orbits, about 384,000 km from Earth, by Kira's reading?

   • No; gravity stops at the clouds
   • Yes; Earth's gravity reaches it and holds it in orbit
   • Yes, but it comes from the Moon alone
   • No; space has no gravity
4. 4.

   Pull-arrow diagram: the same two balls 1 m apart (Pair C) and 3 m apart (Pair D); arrows not drawn. Pair C is two equal balls 1 meter apart. Pair D is the same two balls 3 meters apart. Which pair pulls more strongly, by Luz's thinking?

   • The same, since the masses match
   • Pair D, farther apart
   • Neither, since they sit on Earth
   • Pair C, closer together
5. 5.

   Which pulls harder on Milo: Earth, from below, or a big boulder right beside Milo?

   • Neither pulls on people
   • Earth, because it has far more mass
   • They pull the same
   • The boulder, because it is closer

6. Read this first

   Table (NASA Planetary Fact Sheet), with columns World and Gravity, m/s², surface gravity in m/s²

   Earth 9.8; Moon 1.6; Mars 3.7; Jupiter 23.1.

7. 6.

   Using the NASA gravity table, where would Noah's backpack weigh the least?

   • On Mars
   • On Jupiter
   • On the Moon
   • The same everywhere
8. 7.

   Using the same table, where would Pia's backpack weigh the most?

   • On Earth, its home planet
   • The same everywhere, since mass stays the same
   • On Jupiter
   • On the Moon
9. 8.

   Ren imagines taking a 3 kg ball to the Moon. What happens to the ball's mass there?

   • It grows a little
   • It drops to about 0.5 kg
   • It stays 3 kg
   • It becomes zero
10. 9.

    In Zee's diagram, a big ball and a small ball have pull arrows of equal length pointing at each other. Why are the arrows equal?

    • The arrows show distance, not pull
    • They pull on each other with equal force
    • The diagram is wrong; the big ball pulls harder
    • The small ball pulls harder
11. 10.

    Esme doubles the mass of one ball and keeps the distance the same. What happens to the pull arrows?

    • They both get shorter
    • Just that ball's arrow grows
    • Nothing changes
    • Both arrows get longer, since the pull is stronger