On this first day of the 3rd quarter, we began applying the basics of fractions by using it to solve adding and subtraction problems with the same denominator.
With my second block, I went ahead and covered subtraction by converting to an improper fraction.
In science, students took notes on both parts of the unit since this unit is shorter in duration than the others. Below are the notes:
Rotation – the turning or spinning of an object on its axis
Axis – an imaginary straight line through an object in which it spins. The Earth tilts and spins at an axis of 23.5°
The rotation of the Earth causes night and day. The side of Earth that is away from the sun and faces outer space is at night. The side of Earth facing the sun is at daytime.
Sunrises and sunsets are caused by the rotation of the Earth.
The rotation of the Earth causes changes in the length of shadows.
Shadows are longest in early morning and evening
Shadows are shortest at noon when the sun is directly overhead
The Earth takes about 24 hours (23 hours and 56 minutes) to make one complete rotation.
The Earth’s rotation speed determines the length of days
The Earth’s tilt on its axis causes the changing of the seasons as it revolves around the sun
Revolution – the movement of an object around another object. One complete circle is a revolution (Orbit)
Season – periods in a year marked by changes in weather and temperature. They are caused by the tilt of the Earth’s axis.
The Earth takes 365 ¼ days for a revolution around the sun (1 year)
Hemisphere - half of a spherical body such as a planet.
Lunar Cycle – the moon’s continuous orbit around the Earth approximately every 28 days
Phase – the changes in the moon’s appearance from Earth due to the moon’s position in its orbit
Waxing – the moon’s appearance is getting larger
Waning – the moon’s appearance is getting smaller
New Moon – the moon cannot be seen from Earth
Full Moon – the maximum amount of the moon’s surface that can be seen from Earth
Gibbous – the moon’s appearance is “sea shell-shaped”
First Quarter –waxing phase where only about 25% or ¼ of the moon is visible from Earth (“light on the right”)
Last Quarter –waning phase where only about 25% or ¼ of the moon is visible from Earth (“light on the LEFT”)
Far side of the moon – the side of the moon that is never seen from Earth due to it rotating at the same speed as the Earth.
Tides – the daily, or twice daily rise and fall of the oceans of the world caused by the gravitational pull of the moon and sun, mostly the moon.
· The moon rotates at the same rate as the Earth so that is why we only see one side (near side) from the Earth
· The moon takes roughly 28 days to make a complete revolution (orbit) around the Earth
· The moon is visible due to it reflecting the sun’s light