Vocabulary
Two or More substances mixed together
mixture
Scientists use ____________________ to make observations
their senses
Matter is anything that has ____________ and takes up ______________.
mass (or weight)
space
If you put a Lego brick into a graduated cylinder, and the water level rises 10 milliliters, you have just found the Lego brick's _______________.
volume
What color did the Statue of Liberty used to be?
copper/gold
something that can affect the outcome of an experiment or investigation
variable
Which state of matter has these properties?
-Has a definite volume
-Takes the shape of its container
liquid
True or false?
Solids and liquids can exert a force. Gases cannot.
When a chemical reaction takes place, a new material is formed, but ______ will not change.
mass (or weight)
A parachute works, because ___________ applies a ___________ and pushes upward on the parachute and fills up the space inside the parachute. This slows the parachutist down.
air
force
when matter changes, and a new material is made
chemical change
What is an observation you will make when mixing vinegar with baking soda?
bubbles/fizzing
Which state of matter has particles that are very tightly packed together and can barely move at all?
solid
When making clay, adding more water would make the clay ______, while adding flour would make the clay less _______.
runny, sticky
Why was there a new material all over the science lab after the earthquake?
Some of the substances in the lab mixed together, and a chemical reaction took place. It made something new.
a physical characteristic we can use to describe matter
property
Name 2 properties that a metal might have.
Examples: opaque, waterproof, hard, magnetic, electrical conductivity, thermal conductivity
Particles in this state of matter take the shape of their container, but keep the same volume.
What are the two types of changes a substance can go through?
chemical and physical
When you made clay, did a physical change take place or a chemical change?
chemical
when a solid seems to "vanish" in a liquid
dissolve
How can you tell the difference between salt and sugar if you're not allowed to taste them?
Heat test
-Sugar melts, bubbles, and turns brown and sticky. Salt doesn't react.
Particles in a ____________ move the most freely.
Name three ways we can determine if a new substance is created by a mixture.
Examples: bubbling, color change, temperature change, state change, new properties, giving off light, change in odor
Greg claims that making a piece of toast is just a physical change, because it is still just a piece of bread. Do you agree? Why or why not?
No, because a chemical change took place. The change is not reversible. There's a color change, an odor change, and a taste change. It also becomes harder, which is another new property.