Space
What is the name of our galaxy?
Milky Way
What pulls objects toward Earth’s center?
Gravity
What do we call it when animals change to survive in their environment?
True or False: Human actions can change the environment.
True
What is a wave?
A repeated vibration that transfers energy.
What force keeps planets orbiting the sun?
Gravity
What kind of force is a push or a pull?
Contact Force - a physical force exerted by one object on another when the two objects are in direct physical contact
- examples: push, pull
What are the remains or traces of ancient life called?
Fossils
What do humans use that comes from Earth (like water, oil, trees)?
Natural resources
What kind of wave lets us hear sounds?
Sound wave
What happens when an asteroid hits Earth?
Crater
When something speeds up, slows down, or changes direction, it's called...?
Acceleration
What is it called when species change slowly over a long time?
Evolution; species change over time
What happens when the human population keeps growing?
More resource use, pollution, habitat loss, etc.
What type of energy do waves carry?
Wave energy
- electromagnetic energy (light, radio waves, X-rays)
- mechanical energy (sound)
What’s the difference between a planet and a star?
A star produces its own light. A planet reflects light.
What keeps the moon in orbit around Earth?
Gravitational force
Name one cause of species extinction.
Asteroid impact, climate change, human activity, etc.
What do we call the variety of life on Earth?
Biodiversity
What happens when a wave hits a surface and bounces back?
Reflection
True or False: Galaxies can collide with each other.
True
What two things affect how strong gravity is between two objects?
Mass and distance
What process explains how the “fittest” survive and pass on traits?
Natural Selection
Give one example of human impact on Earth.
Pollution, deforestation, climate change, etc.
What do you call it when waves pass through or bend around things?
Wave interaction (reflection, absorption, refraction, diffraction, etc.)