Earth

Unit Review Sheet

Facts and Definitions

Lesson 1: Our Planet Earth

• The world's oceans are the Atlantic, Pacific, Indian, Arctic, and Southern. (The Southern Ocean was declared the fifth ocean in 2000. It encircles the continent of Antarctica.)

Lesson 2: Matter on the Planet

• An adjective is a word that describes a person, place, thing, or event.

Lesson 3: Digging Into Dirt

• Particles are tiny pieces that come together to form a substance.
• Many animals live beneath the Earth's surface.

Lesson 4: From the Earth

• The Law of Conservation of Matter explains that matter cannot be created nor destroyed.
• All matter is a natural resource or is made from natural resources.

Lesson 5: Rocks

• Minerals are the building blocks of rocks.
• A geologist is a scientist who studies rocks and minerals.

Lesson 6: Water, Water Everywhere

• The ocean has salt water.
• Lakes, rivers, and ponds have fresh water.
• A model is a simple example of a more complex object.

Lesson 7: Taking Care of the Earth

• Recycling is when materials like paper, glass, and plastic are collected and processed into new items.
• Pollution is when waste from humans is left in the environment.

Final Project: Earth Exhibit

• [none]