States of Matter
What are the three most common states of matter?
Solid, Liquid, Gas
Is melting ice a physical or chemical change?
Physical change
What is the first stage of the material lifecycle?
Extraction of raw materials
What is one negative effect of deforestation?
Loss of animal habitats, increased CO2 levels, soil erosion
What state of matter has no definite shape or volume?
Gas
What is the name of the process when a liquid turns into a gas?
Evaporation
Name one sign that a chemical change has occurred.
Color change, gas production, temperature change, formation of a new substance
What happens to most plastic waste if it is not recycled?
It goes to landfills or the ocean
What type of pollution happens when factories release harmful gases?
Air pollution
What process turns a gas into a liquid?
Condensation
Name a substance that naturally exists in all three states of matter on Earth.
Water
Why is burning wood a chemical change?
It creates new substances like ash, carbon dioxide, and heat
What is the correct order of the material lifecycle?
Extraction → Manufacturing → Use → Disposal
How does air pollution from factories affect the environment?
It releases harmful gases that can cause smog, acid rain, and make the air unsafe to breathe.
Name a natural example of sublimation.
Name a natural example of sublimation.
What happens to the particles in a solid when it melts?
They move faster and spread apart
What happens when you dissolve sugar in water—is this a physical or chemical change?
Physical change
Why is recycling important for the environment?
It reduces pollution, saves energy, and conserves natural resources
What happens when too much plastic waste enters the ocean?
It harms marine life and pollutes the water
Why is water considered a unique substance in terms of its states of matter?
Water is the only natural substance that exists in all three states—solid (ice), liquid (water), and gas (water vapour)
What is the term for when a solid turns directly into a gas?
Sublimation
What is the difference between a chemical change and a physical change?
A chemical change creates a new substance, while a physical change does not
What is one way companies can reduce the environmental impact of manufacturing products?
Using recycled materials, reducing waste, using renewable energy, or creating biodegradable packaging
Name one thing individuals can do to reduce their environmental impact.
Reduce plastic use, recycle, compost, conserve water, use reusable bags
What is an example of an everyday chemical reaction?
Baking a cake, rusting, burning wood, digesting food