1. Measuring Up Lesson 35 pps
Measuring Up Lesson 35 pps Interactions of the Earth and Moon Objective 4
At the end of this lesson you will should understand characteristics about the moon and how it interacts with the Earth
TEKS
5.5B Describe some interactions that occur in a simple system.
5.6A Identify events and describe changes that occur on a regular basis.
5.12C Identify the physical characteristics of the Earth and compare them to the phusical characteristics of the moon.
5.12D Identify gravity as the force that keeps the moon in orbit around the Earth.

2. Vocabulary p. 188 Moon: Phases: Gravity:
A natural satellite that orbits a planet
Phases:
The different shapes the moon appears during the lunar cycle
Gravity:
The force that causes attraction between objects that have mass

3. Guided Questions pps
How many planets in the solar system have moons?
six
What are some phases of the moon?
New moon, quarter moon, full moon, etc.
Is the force of gravity a push or a pull?
pull
What are some of the differences between Earth and the moon?
The moon is much smaller than Earth, The moon does not have an atmosphere. The moon also does not have any oceans.

4. Short Answer p. 189 Which two planets do not have moons?
Mercury and Venus
During what phase of the lunar cycle can we see the entire sunlit part of the moon?
During a full moon

5. Short Answer p. 189 Why do we see only one side of the moon?
Because the moon slowly rotates as it revolves around the Earth
Name two differences between the moon and Earth
Earth ahs an atmosphere, the moon does not; Earth has oceans and the moon doesn’t; Earth’s gravity is stronger than that of the moon.

6. Short Answer p. 189 What keeps the moon from shooting out into space?
Earth has more mass than the moon so the gravitational attraction between them keeps the moon close to Earth.
If you weigh 60 pounds on Earth, about how much would you weigh on the moon?
10 pounds

7. Apply the TEKS p. 190
During what two decades did astronauts visit the moon?
The 1960s and 1970s
Why would a compass be useless on the moon?
The moon has no magnetic field
Why are oxygen tanks and spacesuits needed to explore the moon?
The moon has no atmosphere, so it has no air to breathe. The moon has extremes in temperatures.

8. Apply the TEKS p. 190
Pluto is about 19,700 km from its moon, Charon. How much farther is it from Earth to our moon?
380,000 km-19,700km=360,000km
The moon’s gravity is about one-sixth that of Earth. Explain whether a spaceship would need more or less energy to take off from the moon than from Earth.
It would need less energy to take off from the moon because there is less gravity to overcome.

9. TAKS Practice p. 178
Link to TAKS Practice