Scientific Method
What is a hypothesis in the scientific method?
A hypothesis is your educated prediction of what you think will happen and why, and it must be testable.
Anything that takes up space is called
Matter
Why does a heavy stone sink in a pond while a wooden stick floats?
The stone is more dense than the stick.
To find the volume of a regular object you use the formula:
L x W x H
Elements have ___ atom
1
When recording data and doing an experiment, why is it important to write down clear and exact step-by-step procedures (directions)?
Detailed procedures allow other scientists to run the exact same test.
Solid
How tightly packed the particles are in an object is called____.
density
What does the volume of an object tell us?
How much space the object takes up
Elements are found on the __ __
Periodic Table
What should you do while conducting an experiment?
Take notes, track data, make observations
In a ____, particles are slightly spaced apart and move around some. (They take the space of the container)
Liquid
What is the formula for density?
Density = Mass ÷ Volume
We measure volume in cm3. Why do we use the exponent 3?
LxWxH
(there are 3 sides or 3D)
A ___ is a pure substance composed of two or more elements that are chemically bonded.
Compound
At the end of an investigation, you state whether your data supports or does not support your initial prediction. What is this step called?
The conclusion
In a _____ , particles move around freely/quickly and don't stay in one place.
Gas
You can find the volume of an oddly shaped object (like a rock or a small toy) that sinks in water. This method is called:
Water displacement
L = 1
W= 2
H= 3
What is the total volume?
6
A _____ mixture is a mixture that has parts that are mixed unevenly, and you can see the different pieces.
heterogeneous
These are steps of the _____ _____.
1. Make an Observation
2. Ask a Question
3. Form a Hypothesis
4. Conduct an Experiment
5. Analyze and Conclude
Scientific Method
When you change a solid to a liquid it's called ___.
Melting
When you're calculating volume for water displacement, what math operation do you use?
Subtraction
Cylinder 1: Volume of just the water was 40ml
Cylinder 2: Volume of the water with a toy in it is now 50ml
What is the volume of the toy?
10ml
A ____ mixture is a mixture that is mixed evenly throughout. These mixtures are called solutions because the dissolved materials are uniform throughout the mixture.
homogeneous