This is what we call it when there are many different people or things that come together. We have a lot of this at BHS.
What is diversity?
The middle of an atom (contains protons and neutrons).
What is a nucleus?
The two types of bonds that stick atoms together.
(C_______ bonds and I______ bonds)
Humans are made of roughly this percentage of water.
What is 70%?
This is the most ACIDIC substance on this chart.
When you heat up water it does this:
When you cool down water it does this:
Boil
Freeze
According to the video we watched, a nucleus would be this big if you made an atom the size of a football stadium.
What is a marble?

Two atoms form an ionic bond. One atom gives up an electron and takes on a proton. It is this charge (positive or negative)
What is positive.
When water freezes, it does this. (expands and gets less dense or contracts and gets denser)

If a substance's pH is this number, we consider it neutral.
What is 7?
The smallest particle of a substance. An example is a group of atoms like H2O.
What is a molecule?
Of all of the subatomic particles, this one is the SMALLEST.
What is an electron?
Air filters use ions to catch allergen particles when air flows through them. If the filter is negatively charged, it will pick up allergens with this charge.
What is positive.
When a substance HATES water, we call it this.
What is hydrophobic?
This is the most basic substance on this chart.

What is lye?
Anything that has mass and takes up space.
What is matter?
An atom has 5 protons, 5 neutrons, and 8 electrons. It has this charge. (positive or negative)
What is negative?
In this image, the covalent bond shares this subatomic particle.
What is an electron?
What is hydrophilic.
All acids will burn your skin (true or false).
What is false?
Density, color, boiling point, and freezing point are all examples of a substance's ___________ property.
What is physical?
List the three subatomic particles and their respective charges.
Protons: Positive charge +
Neutrons: No charge 0
Electrons: Negative charge -
This is a molecule of what substance?
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What is water?
Water bugs are able to walk on water because of this water property.
What is hydrogen bonds or surface tension.
This is the word for the substance that keeps our blood's pH from getting too acidic or too basic when we eat foods.
What is a buffer?