Gravity, Planets and
food that has a lot of water in it will weigh more than other foods. One of the
heaviest and most nutritious water-bearing kind of foods is an orange. Since an
orange also kind of, sort of looks like another planet in our solar system,
peel and eat one for today's snack. Tastes great with a glass of another kind
of fruit juice - maybe apple or white grape.
Bathroom scale | scratch paper and
Did you know that, because of gravity, things weigh
a LOT more or a LOT less in outer space than they do here on Earth?
For example, on our moon, a person
who weighs 110 pounds here on Earth weighs only about 18 pounds up there! The
moon's gravitational pull is only about one-sixth as much as the Earth's.
You can either weigh yourself on a
bathroom scale right now, or if you know your weight, just use that number. You
can also use the weight of a favorite pet if you wish. To figure out how much
YOU or a favorite pet would weigh on the moon, multiply that weight times one-sixth,
which in decimals is .1667.
How about weight differences between
Earth and the other planets in our solar system? Here's a chart that can help
you find out. Take your weight, or the weight of a favorite pet, and multiply
it times the gravity factor of each of these planets. They are in decimals, so
that will give you some practice multiplying decimals as well.
Just to give you an example, let's
say you weigh 88 pounds. To find out how much you would weigh on Jupiter,
multiply 88 x 2.53. Answer: 223 pounds! Hey! You could be in the NBA at that
Use scratch paper and fill it this
chart to show how much you or a favorite pet would weigh because of the
differences in gravity:
Planet Gravity Factor x Weight =
Mercury .38 ________ ________
Venus .88 ________ ________
Mars .38 ________ ________
Jupiter 2.53 ________ ________
Saturn 1.19 ________ ________
Uranus .91 ________ ________
Neptune 1.13 ________ ________
Pluto .06 ________ ________
On which planet would you weigh the
most? On which planet would you weigh the least? What's the difference between
those two numbers?
On which planet do you like your weight number the best?
Most people say Earth. Guess that's why they say: There's no place like home!