Modeling
Matter
Matter
Two or more substances combined but not chemically changed.
A Mixture
This type of organism, usually a plant, makes its own food using sunlight.
A producer
The Sun seems to travel across the sky each day because Earth is doing this.
rotating
Wind, water, or ice can move rock or soil from one place to another. This process is called this.
erosion
Name the animal — then make the sound — of the creature that wakes everyone up at sunrise.
rooster
When you stir sugar into water, it seems to disappear because its tiny particles spread out evenly among the water particles.
dissolves
the prey population grows too large, which leads to fewer plants and an unbalanced food web. This describes what happens when this event occurs.
The loss of a top predator
This happens because Earth spins on its axis, giving us periods of light and darkness.
day and night
All the water on Earth—oceans, lakes, rivers, and even clouds—belongs to this sphere.
hydrosphere
Make the sound of something you hear when the microwave finishes heating your snack.
Beep, beep, beep
Filtering, evaporation, magnetism, and sorting are all examples of this process used to take apart different materials that are mixed together.
separating a mixture
Water, sunlight, and soil are all examples of this type of nonliving part of an ecosystem.
An abiotic factor
As Earth orbits the Sun, our nighttime view changes, which is why we see different ones of these in different seasons.
constellations
Plants help stop erosion because their roots do this to the soil.
hold it in place
Make the sound you hear when someone steps on a chip without meaning to.
crunch
A color change, a temperature change, gas bubbles, or the formation of a brand‑new substance are all clues that this has happened.
A chemical reaction
When pollution enters a lake or river, it harms the water quality, making it harder for many fish to survive. This explains why their population might do this after pollution.
decrease
Throughout the month, we see different amounts of the Moon’s lit side, causing these changes.
the Moon's phases
During a rainstorm, water from the air falls onto the land. Which two Earth systems are interacting?
Biosphere & geosphere
Atmosphere & hydrosphere
atmosphere and hydrosphere
Make the sound of something you hear when a basketball bounces on the gym floor over and over.
thump-thump-thump
When you bake a cake, the ingredients mix and heat up to form brand‑new substances that you can’t change back. This is why baking a cake is an example of this kind of change.
A chemical reaction
In every ecosystem, living things rely on one another for food, shelter, reproduction, and survival. These connections explain how all organisms do this within their environment.
depend on each other
Even though it’s just a star like many others, this one looks bigger because it is much closer to Earth.
the sun
Plants grow in soil and animals dig in the ground. Which two Earth systems are interacting?
geosphere and biosphere
Hydrosphere and atmosphere
geosphere and biosphere
Make the sound of something you hear when a giant crowd cheers loudly at a championship game.
YAAAAAY!