Matter
This process changes a solid into a liquid.
What is melting?
This organism makes its own food using sunlight.
What is a producer
This is the basic unit of life.
What is a cell?
Harmful substances in the environment are called this.
What is pollution?
This is the main source of Earth’s energy.
What is the sun?
This is how much space an object takes up.
What is volume?
his is the path of energy from one living thing to another.
What is a food chain?
A group of cells working together is called this.
What is tissue?
These include coal, oil, and natural gas.
What are fossil fuels?
Heat transfer between objects that are touching is called this.
What is conduction?
This is a mixture where one substance dissolves into another.
What is a solution?
Plants need these four things to survive.
What are sunlight, water, Carbon Dioxide, and nutrients?
These help the body move.
What are bones and muscles?
This is energy that will not run out.
What is renewable energy?
The equator is warmer because it receives this.
What is more direct sunlight?
Most substances do this when heated.
What is expand?
When organisms fight for the same resource, this happens.
What is competition?
These make food for the plant using sunlight.
What are leaves?
This turns food and plant waste into soil.
What is composting?
This gas makes up most of the atmosphere.
What is nitrogen?
This type of change creates a new substance.
What is a chemical change?
This might happen if a top predator disappears.
What is prey overpopulation or food chain disruption?
This organ brings oxygen in and removes carbon dioxide.
What are the lungs?
An increase in this gas traps heat in Earth’s atmosphere.
What is carbon dioxide?
This is the average weather over a long period of time.
What is climate?