Ecosystems
What is an ecosystem?
A community of living and nonliving things that interact.
What is the star at the center of our solar system?
The Sun
What is matter?
Anything that has mass and takes up space.
What is energy?
The ability to do work or cause change.
What is motion?
A change in position over time.
What are the two parts of an ecosystem?
Living things and nonliving things.
How many planets are in our solar system?
Eight
What are the three main states of matter?
Solid, liquid, and gas.
What is the main source of energy for Earth?
The Sun
What force pulls objects toward Earth?
Gravity
Give an example of an ecosystem.
Forest, desert, ocean, pond, or grassland.
Which planet is known as the Red Planet?
Mars
Which state of matter has a definite shape and volume?
Solid
What type of energy is stored in food?
Chemical energy
What do we call how fast an object is moving?
Speed
How do living things depend on nonliving things in an ecosystem?
They need water, air, sunlight, and soil to survive.
What force keeps planets in orbit around the Sun?
Gravity
What state of matter takes the shape of its container but has a definite volume?
Liquid
What type of energy is produced by moving objects?
Kinetic energy
What is needed to change the motion of an object?
A force
What could happen to an ecosystem if one species disappears?
The balance of the ecosystem could change, affecting other plants and animals.
What galaxy contains our solar system?
The Milky Way Galaxy
What state of matter has no definite shape or volume?
Gas
What is the energy stored in an object because of its position called?
Potential energy
What happens to an object's motion when a force pushes or pulls it?
It can speed up, slow down, stop, or change direction.