Why does a balloon inflate when you blow air into it? (think matter)

Tiny matter particles fill the space by spreading out
inside the balloon.
What is the role of a decomposer?
A decomposer breaks down dead animals and plants, returning nutrients to the soil.

What pulls objects toward the center of the Earth?
Gravity, Gravitational Force/Pull
What are the 4 spheres of the Earth?
Geosphere, Hydrosphere, Biosphere, Atmosphere

If ice melted to water, what would happen to the matter?
Matter stays the same. (It can't be created or destroyed)

In Yellowstone, grass grows using sunlight, air, and water. An elk eats the grass, gaining energy and materials. Later, a wolf eats the elk.
What is the BEST statement about where the elk gets the energy and materials that make up its body?
A. The elk made its energy from soil and water
B. The elk got both energy and materials from the grass it ate
C. The elk got energy directly from the sun
D. The elk did not need food for growth
B. The elk got both energy and materials from the grass it ate.

Why does the sun appear brighter than the other stars?
The sun is closer to the Earth.

What happens when wind and clouds in the atmosphere interact with land?
They create weather patterns.

Name one property that can help identify a material?
Color, magnetism, mass, texture, size
A pond has fish, frogs, insects, and plants. Everyone has enough food, water, and space. Then, people add a new kind of fish that eats most of the insects. Soon, frogs begin to disappear.
What is the BEST explanation?
A. The pond has too much sunlight
B. The frogs forgot how to find food
C. The new fish upset the balance
D. The plants stopped growing
C. The new fish upset the balance, so frogs couldn’t meet their needs.

What is the definition of a star?
It's an exploding ball of hot gas that is held together by gravity.
Where is most of Earth’s water found?
Bonus: Where is most of Earth's fresh water found?
The ocean.
Ice. Mostly at the poles.

When baking soda and vinegar are mixed, how can you tell a new substance may be forming?
Bonus question: What kind of change is that?
Bubbling/fizzing
(chemical change)
A rabbit eats grass, and then a fox eats the rabbit. What source does the energy the fox gets start from?

The Sun
What causes day and night? How long does it take the Earth to ROTATE?
Earth's rotation, 24 hours

How do humans harm Earth’s environment?
Pollution; destroying animal habitats; overfishing/hunting; farming; using too many resources (minerals and water)
