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
   • Only Earth pulls on things
   • Only very big objects pull, like planets and stars
   • Objects pull only when they touch
2. 2.

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

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

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

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

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

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

5. 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.

6. 5.

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

   • On Mars
   • On the Moon
   • The same everywhere
   • On Jupiter
7. 6.

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

   • The same everywhere, since mass stays the same
   • On Jupiter
   • On the Moon
   • On Earth, its home planet
8. 7.

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

   • It becomes zero
   • It drops to about 0.5 kg
   • It stays 3 kg
   • It grows a little
9. 8.

   Tala's diagram shows the same two balls twice: close together with long arrows, and far apart with short arrows. What do the arrows show?

   • The pull is stronger when they are farther apart
   • The arrows show how big the balls are
   • Just one ball does the pulling
   • The pull is stronger when they are closer
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 small ball pulls harder
    • The arrows show distance, not pull
    • They pull on each other with equal force
    • The diagram is wrong; the big ball pulls harder
11. 10.

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

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