Liceo Santa Clara Grado Noveno Actividad 1
3
Copyright ©2012 K12Reader - http://www.k12reader.com What is Gravity Cross-Curricular Focus: Physical Science You may have seen pictures of astronauts. They oat fl around in space. They y fl in a space shuttle. Have you ever wondered why they oat? fl Your feet stay rmly on the fi ground. Why don’t theirs? When you drop something, why does it fall? The answer to these questions is something called gravity. It affects everything we do. Many years ago, a man named Sir Isaac Newton wondered about gravity, too. He watched and tested the way things move and fall on Earth. He wrote his ideas down. Scientists today use a lot of his ideas. Those ideas are now considered laws of science. Gravity is a force that makes all objects attracted to each other. The bigger the object is, the more it attracts things. Since nothing on Earth is bigger than planet Earth itself, all the things and people on Earth are attracted by Earth. Everything is pulled toward the center of the planet. That is why things fall to the ground. It is also why people and things stay on the ground instead of oating fl around in space. Earth is even large enough to attract our moon. That’s why we can see it in our sky!
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Present simple, present perfect
Transcript of Liceo Santa Clara Grado Noveno Actividad 1
Copyright ©2012 K12Reader - http://www.k12reader.com
What is GravityCross-Curricular Focus: Physical Science
You may have seen pictures of astronauts. They float around in space. They fly in a space shuttle. Have you ever wondered why they float? Your feet stay firmly on the ground. Why don’t theirs? When you drop something, why does it fall? The answerto these questions is something called gravity. Itaffects everything we do.
Many years ago, a man named Sir Isaac Newton wondered about gravity, too. He watched and tested the way things move and fall on Earth. He wrote his ideas down. Scientists today use a lot of his ideas. Those ideas are now considered laws of science.
Gravity is a force that makes all objects attracted to each other. The bigger the object is, the more it attracts things. Since nothing on Earth is bigger than planet Earth itself, all the things and people on Earth are attracted by Earth. Everything is pulled towardthe center of the planet. That is why things fall to the ground. It is also why people and things stay on the ground instead of floating around
in space. Earth is even large enough to attract our moon. That’s why we can see it in our sky!
Copyright ©2012 K12Reader - http://www.k12reader.com
Cross-Curricular Reading Comprehension Worksheets: B-9 of 36
Name:
Answer the following questions based on the reading passage. Don’t forget to go back to the passage whenever necessary to find or confirm your answers.
1) Why do your feet stay on the ground instead of floating?
2) Who was the scientist who did experiments with gravity and motion many years ago?
3) Why are things and people attracted to Earth?
4) What can we see in the sky because of gravity?
5) What would it be like if there were no gravity on Earth?
CLASSIFY INTO THE CHART THE VERBS IN PRESENT, PAST AND PRESENT PERFECTCLASIFIQUE EN LOS CUADROS LOS VERBOS EN PRESENTE, PASADO Y PRESENTE PERFECTO
PRESENT PAST PRESENT PERFECT
Exercise 2
Present Tense
Fill in the spaces with the correct form of the verb in simple present perfect tense.
Then, indicate whether the past participle is regular or irregular.
Example: Ida (look) has looked all morning for her glasses. She still can’t
find them. (regular / irregular)
Example: The wind (blow) has blown our patio furniture away. Let’s go get it.
Copyright ©2012 K12Reader - http://www.k12reader.com
(regular / irregular)
1) Charity (break) _______ ________ her leg on the ski slope. Please dial 911.
(regular / irregular)
2) The city (allow) _______ ________ residents to shoot off fireworks each year on the
Fourth of July. (regular / irregular)
3) The lake (freeze) _______ ________ solid. Now we can go skating. (regular /
irregular)
4) The sun (rise) _______ ________. It’s time to get up. (regular / irregular)
5) The army (battle) _______ ________ the enemy for two weeks. The soldiers are
exhausted. (regular / irregular)
