Physical & Chemical Reactions
Breaking a glass is a ____________reaction.
What is Physical reaction
Earth takes this long to complete one rotation.
What is: 24 hours
Organisms that make their own food using sunlight.
What are: Producers
Anything that takes up space and has mass.
What is: Matter
These elements are shiny and good conductors.
What are: metals
Baking a cake is a __________reaction.
What is: Chemical reaction
Shadows are longest at this time of day.
What is: morning or evening
This habitat has very little rainfall and extreme temperatures.
What is: a desert
What type of matter is mustard?
What is: liquid
Elements are arranged by this number on the periodic table
What is: atomic number
Dissolving salt into water is a _________reaction.
What is: Physical Reaction
This causes shadows to move during the day.
What is: Earth's Rotation
This adaptation helps animals blend into their surroundings.
What is: Camouflage
Name an chemical compound that transitions from solid to liquid to gas on a daily basis.
What is: Water, or H2O
Gold’s chemical symbol is this.
What is: Au
A type of change that forms a new substance is a _______reaction?
What is: Chemical reaction.
These are giant balls of hot gas that give off light and heat.
What are: Stars
This large ecosystem includes all living things and environments on Earth.
What is: The biosphere
In this state of matter, molecules are tightly packed together and vibrate in place.
What is: A solid
This is the smallest unit of an element.
What is: an atom
A chemical reaction gives off clues. Name 3 clues that a chemical reaction has occured.
What is: Smell, Light, Heat, Gas, Color Change, Can't be undone.
A system that includes a star and objects orbiting it.
What is: a solar system
Burning fossil fuels increases this gas in the atmosphere.
What is: Carbon Dioxide
How would you describe the molecules in a gas ?
What is: Spread out
These particles have a negative charge.
What are: Electrons