Dissolving salt in water is a ______________
A straight piece of wire is coiled to form a spring. What type of change?
Chewing food to break it down into smaller particles represents a _________ change, but the changing of starch into sugars by enzymes in the digestive system represents a ___________change.
In a fireworks show, the fireworks explode giving off heat and light. What type of change?
True or False. Changing the size and shapes of pieces of wood would be a chemical change.
True or False. When ice cream melts, a chemical change occurs.
Liquid water particles boiling and turning into a gas (water vapor). Physical or Chemical?
You blow dry your wet hair. What type of change?
You forgot to dry the bread knife when you washed it and reddish brown spots appeared on it. (Rust)
_______________ changes happen when atomic bonds are broken or created during chemical reactions.
You step on a soda can and crush it. Why is this a physical change?
Which of the following is evidence of a chemical change?
baking soda + vinegar → gas + white solid Which of the following is a reactant in the equation?
Which of the following is NOT a chemical change?
Scientists study the characteristics of substances to better understand the natural world. Which of the following is not a chemical or physical characteristic of a substance?
What kind of chemical change might be observed in cars driven in coastal areas or in areas that use salt to treat icy roads?
Which of the following is an example of a chemical change?
In a chemical equations, the compounds or elements on the left side of the arrow are called the _________________________.
Which of the following is a physical change?
Which of the following is NOT a physical change?
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