6.1 guided reading

The study of matter and how Matter changes is called _____?

Chemistry

What is matter?

-Anything that has mass and takes up space

Chemical property

-how it can be observed: by changing one substance into another -ex./ ability to burn

Physical property

-how it can be observed: without changing one substance into another -ex./ color

If you detect a change in the color of a material, why does this indicate that a chemical reaction might have occurred?

-matter's property of color has changed to another

What are the two main kinds of changes that you can observe when chemical reactions occur?

-changes in the properties —reactants turn into products

A change in matter that produces one or more new substances is a ____?

-chemical change

Suppose you mix two clear liquids together and bubbles form. What type of change might this indicate? Explain.

-chemical change as the 2 liquids are having a reaction with each other causing bubbles to form (breaking bonds and creating new ones)

Endothermic reaction

-energy is absorbed -ex./ mixing baking soda and vinegar

Exothermic reaction

-energy is released -ex./ burning wood

What are some examples of physical change?

-flattening/pulling on a marshmallow -tearing a paper

Bending a straw and braiding hair are examples of what?

-physical changes in matter

A solid that forms during a chemical reaction is called a ______?

-precipitate

Why does a change in temperature indicate that a chemical reaction may have occurred?

-sign of a chemical reaction is that one or more new substances are produced -ex./ when water boils, gas bubbles rise

What happens to the bonds between atoms when chemical changes occur?

-the bonds break apart and bond with new atoms to create new outcomes

What are some examples of a chemical change?

-toasting a marshmallow -making/baking bread

True or false? A physical change never alters the form or appearance of a substance?

False

True or false? A change in energy occurs during a chemical reaction.

True

True or false? Endothermic reactions always result in a decrease in temperature?

True