Matter & Its Interactions
What are the three common states of matter?
Solid, liquid, gas
What three things do plants needs to make their own food?
Sunlight, water, carbon dioxide.
What causes day and night?
Earth's rotation.
What is the closest star to Earth?
The sun
What is the first step in the engineering design process?
Ask (identify the problem)
What happens to water when it freezes?
It changes from a liquid to a solid.
What is a producer in an ecosystem?
An organism that makes its own food, like a plant.
What is the water cycle?
The movement of water through evaporation, condensation, precipitation.
what causes the Moon to appear to change shape?
Its phases based on the Sun's light and Moon's orbit
What does a prototype help engineers do?
Test their design ideas
True or false: Mass changes when an object changes shape.
False
Name one example of a food chain (with at least three parts).
Grass --> rabbit --> fox
Name three natural resources
Water, soil, coal, sunlight, etc.
How long does it take Earth to orbit the Sun?
One year (about 365 days)
What is a constraint in engineering?
A limitation, like time, cost, or materials.
Name a way you can separate a mixture
Filtration, evaporation, magnetism, etc.
What role do decomposers play in an ecosystem?
They break down dead matter and return nutrients to the soil.
What causes erosion?
Wind, water, ice, gravity
What causes seasons on Earth?
Earth's tilt and its orbit around the Sun
Why do engineers redesign their projects?
To improve solutions based on test results.
What is a physical change?
A change that doesn't form a new substance (e.g., melting, cutting).
How can environmental changes affect animal populations?
Changes like drought or pollution can reduce or shift populations.
How do volcanoes change the Earth's surface?
They add new land and change landscapes with lava and ash.
Name all the planets in our solar system
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
How do models help scientists and engineers?
They represent systems or ideas to test and explain.