VOCABULARY
IS A FORCE OF ATTRACTION THAT PULLS AN OBJECT, BUT DOES NOT PUSH ON THEM.
WHAT IS GRAVITY?
IN WHICH DIRECTION DOES EARTH'S GRAVITY PULL?
TOWARD EARTH'S CENTER
ELLA WANTS TO TEST THE EFFECTS OF GRAVITY ON DIFFERENT OBJECTS. SHE DECIDES TO TEST THE EFFECTS OF GRAVITY ON OBJECTS THAT HAVE DIFFERENT WEIGHTS. SHE CHOOSES A PAPER CRANE, A GOLF BALL, AND A LARGE BOOK. SHE THEN DROPS THEM FROM THE SAME HEIGHT. WHAT WILL HAPPEN TO ALL THE OBJECTS?
ALL OBJECTS WILL FALL DOWN
THE STREAK OF LIGHT THAT A CHUNK OF ROCK FALLING FROM SPACE TOWARD EARTH PRODUCES
WHAT IS A METEOR?
THE FORCE OF GRAVITY BETWEEN TWO OBJECTS WILL INCREASE AS THEY
MOVE CLOSER
ERIK IS HEADING OUT ON A CAMPING TRIP WITH HIS FAMILYT. AT NIGHT, THE STARS LIGHT UP THE SKY. THEY SEE A BRIGHT LIGHT STREAK ACROSS THE SKY. HIS DAD SAYS, "THERE'S A SHOOTING STAR! MAKE A WISH!" ERIK MAKES A WISH BUT THEN EXPLAINS TO HIS DAD WHAT HE LEARNED IN CLASS ABOUT SHOOTING STARS. WHAT WOULD ERIK SAY? USE ONE SENTENCE.
SHOOTING STAR IS A TERM USED TO DESCRIBE THE STREAK OF LIGHT, THAT FOLLOWS ROCKS, OR METEORS PULL BY EARTH'S GRAVITY.
WHAT IS A METEORITE?
THE SUN'S GRAVITY IS STRONGER THAN EARTH'S BECAUSE THE SUN IS _______________ THAN EARTH.
BIGGER
AFTER THE CAMPING TRIP, ERIK'S PARENTS GIVE HIM A METEORITE AS A GIFT. HE DECIDES TO WEIGH THE METEORITE AT HOME, ON TOP OF A HILL, AND CLOSE TO THE SHORE. THE METEORITE WILL WEIGH...
THE SAME IN ALL LOCATIONS
A CURVED PATH THAT AN OBJECT MAKES AROUND ANOTHER OBJECT
ORBIT
IF YOU WENT TO THE MOON, YOU WOULD WEIGH LESS THAN YOU DO ON EARTH. THIS IS BECAUSE
THE MOON'S GRAVITY IS WEAKER THAN EARTH'S GRAVITY
RITA'S BROTHER, PAOLO, THINKS THE SUN IS IN ORBIT AROUND EARTH BECAUSE THE SUN LOOKS SMALLER THAN EARTH FROM WHERE THEY ARE STANDING. HOW COULD RITA SHOW PAOLO THAT THE SUN IS NOT IN ORBIT AROUND THE EARTH? WHAT MODEL WOULD YOU USE?
SHOW PAOLO THE SOLAR SYSTEM AND HOW ALL THE PLANETS ARE IN ORBIT AROUND THE SUN.
FROM EARTH, IT CAN LOOK LIKE A SHOOTING STAR
WHAT IS A METEOR?
THE SUN'S GRAVITY AFFECTS EARTH BY
HOLDING EARTH IN ORBIT
YOU'RE IN A ROCKET SHIP ON YOUR WAY TO THE MOON! BEACUSE IT CAN GET LONELY OUT IN SPACE, YOU ARE ALLOWED TO BRING YOUR PET DOG, SIRIUS. TO MAKE SURE SIRIUS STAYS HEALTHY, YOU WEIGHED HIM BEFORE YOU LEFT. NOW THAT YOU ARE ON THE MOON, YOU WEIGH HIM AGAIN. HOW WILL SIRIUS'S WEIGHT CHANGE?
SIRIUS WILL WEIGH LESS BECAUSE GRAVITY IS WEAKER ON THE MOON THAN IT IS ON EARTH.