Science STAAR Review

Changes to Land Sun, Earth, and Moon

Space

Changes to Land

• Wind, water, and ice can change Earth’s surface.1. Weathering is the breakdown of Earths crust into

smaller particles called sediment.2. Erosion carries away the sediment to another

location.3. Deposition is the building

up (depositing) of new land in a location

Changes to Land

• Sand dunes form when wind-blown sand builds up

• Deltas form when water-born sediments are deposited at the mouths of rivers.

Changes to Land

• Canyons form when moving water cuts through the Earth’s surface.

Properties of Soil

• Soil can be sorted based on particle size, texture, color, and capacity to retain water.

Properties of Soil

Patterns on Earth

• We can collect and analyze data to predict patterns of change observable on Earth.

• Shadows are caused by objects blocking light.• Tides are caused by the tug of the

Moon’s gravitational pull on the oceans as the Moon moves around Earth.

Patterns on Earth

• Seasons occur when the Earth revolves around the Sun once a year and the tilt of the Earth on its axis

Patterns on Earth

• The Moon’s appearance changes in the same pattern each month and can be predicted.

• Takes about 30 days to complete one cycle.

Water Cycle/ Hydrologic Cycle

• The Sun provides the energy that evaporates water on Earth.

• Water that evaporates from the ocean does not contain salt.

Earth’s Rotation

• The day and night cycle occurs every 24 hours due to the rotation of the Earth.

• We can demonstrate that the rotation of the Earth causes the day/night cycle.

Earth’s Rotation

• The Sun appears to move across the sky each day due to the rotation of the Earth.

• The apparent path of the Sun changes with the seasons.

Earth, Sun, and Moon

The Sun is made of gases, while the Earth and Moon are made largely from rock.

Earth, Sun, and Moon

Earth, Sun, and Moon

Earth, Sun, and Moon

Earth, Sun, and Moon

• The Sun and Earth have very different atmospheres, while the Moon does not have an atmosphere, and only the Earth has liquid water.

Planets

• Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.