# Science

## Science Test

### The Scientific Method

• Problem or Question
Step 1
• Hypothesis
An educated guess about what you think will happen
• Experiment
A way to test your hypothesis
• Gather & Record Data
• Conclusion
Summary that you create after interpreting your data

### States of Matter

A brick is a

Car exhaust is a

Orange juice is a

### Scientific Investigation

• Observation
What you notice with your 5 senses
• Results/ Data
What you record once you finish an experiment
• Hypothesis
An educated guess of what you think will happen
• Dependent Variable
The part of the experiment that changes as you change the independent variable
• Independent Variable
The part of the experiment that a person changes. What you test.
• Procedure
Steps you use to complete an experiment
• Constant
The part of the experiment that always stays the same in order for an experiment to be fair
• Purpose
Why you are doing the experiment
• Materials
All the things you need for the experiment
• Conclusion
The results and why the results happened

### States of Matter

• Mass is the amount of space and object takes up
• A LIQUID has molecules that move freely and bounce off each other
• Volume is the amount of gas an object has
• A SOLID has molecules that are very close together and hold on to each other
• A GAS has molecules that are close together but do not hold onto each other
• Molecules are the tiny particles that make up matter

### Solids

#### Solids have

• Definite Shape
• Definite Volume
• Neither/ Unknown

### Liquids

#### Liquids have

• Definite Shape
• Definite Volume
• Neither/ Unknown

### Gases

#### Gases have

• Definite Shape
• Definite Volume
• Neither/ Unknown

### Matter and Changes in State

• Weight
How strongly gravity pulls on an object
• Buoyancy
An object's resistance to sinking
• Mass
How much matter an object has
• Volume
How much space an object takes up
• Melting point
The temperature at which a substance melts
• Boiling point
The temperature at which a substance boils
• Freezing point
The temperature at which a substance freezes
• Matter
Anything that takes up space and has mass
• Element
Has only 1 ingredient
• Compound
Made of 2 or more elements that can ONLY be separated chemically
• Mixture
Made of 2 or more elements mixed together, but each elements stays the same and does not change.